Course Taught

• M.Sc.  Semester I: (i) Magnetochemistry (ii) Spectra and Electronic Structure of co-ordination compound.
• Semester II: (i) Inorganic Photochemistry (ii) X-Ray crystallography (iii) Inorganic Spectroscopy (iv)Inorganic Chemistry Practical
• PhD Course Work: (i) X-Ray crystallography (ii) Inorganic Spectroscopy (iii) Research Methodology and Research and Publication Ethics

Professional Experiences

• Associate Professor: North-Eastern Hill University, Shillong, Meghalaya, India: Since July, 2023.
• Assistant Professor: North-Eastern Hill University, Shillong, Meghalaya, India: May, 2013-July 2023.
• Fast Track Scientist: Indian Association for the Cultivation of Science, Kolkata, India (2012-2013)
• Alexander von Humboldt (AvH) Fellow: Universität Siegen, Germany (2009-2011).
• BK21 Postdoctoral Fellow: Korea Advanced Institute of Science and Technology (KAIST), South Korea (2007-2009).

Research Interest

Dr. Khatua’s research group at NEHU spans a broad spectrum of chemical sciences, integrating inorganic, organic, biological, supramolecular, and materials chemistry. Currently, our primary focus is on developing luminescent transition metal complexes for diverse applications, including chemical sensing, bioimaging, and photo- and electrocatalysis.

Our research scholars work extensively with d⁶ transition metals, such as Ruthenium(II) and Iridium(III) as well as d¹⁰ systems like Copper(I) polypyridine complexes and organic dye molecules. Group members gain hands-on expertise in monitoring photophysical properties using UV-Vis and luminescence spectrophotometry. Additionally, researchers receive comprehensive training in solid-state and solution-phase structural elucidation utilizing X-ray crystallography, HRMS, and advanced 1D/2D NMR techniques (including COSY, HSQC, and HMBC).

Our core research areas include:

• Inorganic Photochemistry, Sensing and Bioimaging
• Photoactive Supramolecular Assembly
• Photodynamic therapy
• Metal Complex-Based photo and electrocatalyst

Awards and Fellowships

• CRSI Bronze medal award for 2027, Chemical Research Society of India
• CSR Bronze Medal Award 2024, Vidyasagar University, West Bengal
• Alexander von Humboldt (AvH) Fellowship, Bonn, Germany: July, 2009.
• BK21 (Brain Korea) postdoctoral fellowship, KAIST, South Korea: July, 2007.
• Junior Research Fellowship (JRF), IIT Kharagpur, India: 2002
• Senior Research Fellowship (SRF), IIT Kharagpur, India: 2004

Fellow and Membership

• Fellow of the Indian Chemical Society (FICS), Calcutta.
• Life member (Membership no LM 2431) of the Chemical Research Society of India (CRSI), Bangalore.
• Life member of Chirantan Rasayan Sangstha (CRS), West Bengal.

Administrative responsibilities undertaken: 

• Warden of Undergraduate (B.Tech) hostel (Hostel No 19, NEHU, 2017-2025).

Academic affiliations:

1. Member of the Departmental Research Committee, Dept. of Chemistry, NIT, Meghalaya (2016-2019).
2. Member of the School Board of Chemistry (2017 to 2019).
3. Member of the BOS of the Statistics Department (from 2020-2023).
4. Member of the BOS of the Chemistry Department (from 2020-2023).
5. Member of the School Board of Life Science (2020-2023).
6. Member of the MOOCs technical committee, NEHU (from 2022-2024).
7. Member of the IPR cell, NEHU (from 2022-2023)
8. University SWAYAM Coordinator (from 2023)
9. Member, Institutes Innovation Council (IIC), NEHU (from 2023)
10. Member, Anveshan, NEHU (from 2023)
11. Member of Doctoral Research Committee, Dept. of Chemistry, SRM INSTITUTE OF SCIENCE AND TECHNOLOGY, Chennai (2023).

Collaboration/Consultancy:

1. Prof. Kripamoy Aguan, NEHU
2. Prof. Alakananda Hajra, Visva-Bharati University, India
3. Prof. P. K. Iyer, IIT, Guwahati
4. Dr. Susnata Pramanik, SRM Institute of Science and Technology (SRMIST)
5. Dr. Subrata Kundu, CSIR-CECRI, Karaikudi

Technical Responsibilities 

• In-charge of Waters HRMS instrument (Chemistry Dept., NEHU)
• Co- in-charge of Single crystal XRD instrument (Chemistry Dept., NEHU)
• In-charge of Cyclic Voltammetry instrument (Chemistry Dept., NEHU)

Other Assignments

1. Reviewer of ACS, RSC, Wiley and Elsevier/Springer journals.

Research Guidance

• Ph.D. Student: Degree Awarded: 7; Working: 3 
• M.Sc. Project Student Supervised: 37

Research Projects

1. DST (Department of Science & Technology, India) FAST track project on “Chemosensors for cation and anion” (PI). (2014-2017)
2. Assessment of climate change impact on soils and various water basins of Meghalaya using existing and newer techniques (Co-PI); DST, India, (SPLICE-Climate change programme), (30.03.2019 to 29.03. 2022)
3. Development of triplet emitting d⁶-metal complexes containing substituted polypyridine ligands for sensing and catalytic application (15.03.2024-14.03.2027) SERB, India

Publications

Publications and Research Accomplishments

Publication in Journal 

76. Rabha, M.; Baruah, K.; Lyngkhoi, D. L.; Khamrang, T.; Srithar, R.; Pramanik, S.; and Khatua, S.* Effect of Aryl Substituents in Pyridyl-Imidazopyridine Ligands on the Aggregation-Induced Emission of Organoiridium(III) Complexes: Implications of ³MLCT and ³ILCT Excited States, Organometallics, 2026;  https://doi.org/10.1021/ acs.organomet.6c00217

75. Lyngkhoi, D. L.; Baruah, K.; Khamrang, T; and Khatua, S.* AIE-active bis-heteroleptic ruthenium(II) complexes featuring aryl-substituted pyridylimidazopyridine ligands for highly efficient detection of picric acid in aqueous media, Dalton Trans., 2026, 55 (36), 13147–13161

74. Baruah, K.; and Khatua, S.*A Heteroleptic Cu(I) Complex-based Probe for Selective Luminescent Light-up Detection of Phosgene, Analyst, 2026, 151, 4589 - 4593

73. Kashyap, N.; Baruah, K.; Gogoi, J.; Patra, S. K.; Barman, P.; Bhabak, K. P.; and Khatua, S.* Aggregation Induced Emission Active Organoiridium(III) Complex Based on Piperazine-substituted 1,10-phenanthroline Ligand as pH-Responsive Probe, Chemistry-An Asian Journal, 2026, 21: e70772

72. Lyngkhoi, D. L.; Baruah, K.; Patra, S. K.; and Khatua, S.* A Seven-membered Heterocycle Containing Coumarin-Based Probe for Selective Detection of Chemical Warfare Agent Phosgene in Solution and Gas Phase. New J. Chem. 2026, 50, 8498 – 8509.

71. Sen, B,; Gogoi, J.; Aguan, K.; and Khatua, S.* Lighting Up Hypochlorous Acid through C(sp²)–H Hydroxylation with a Solvatochromic Organoiridium(III) Complex-based Probe, Analyst, 2026, 151, 2390-2400.

70. Khatua, S.* Kashyap, N.; Sen, B.; Baruah, K.; Rabha, M.; and Kalita, D. J. A Solvatochromic Luminescence Color Switchable Iridium(III) Complex of a Click-generated Ligand for Nitroaromatic Explosive Detection, CrystEngComm, 2026, 28, 2403-2414.

69. Gogoi, J.; Nagappan, S.; Khatua, S.* and Kundu, S.* Heteroleptic Ruthenium(II) Complexes of Phenanthroline-based Ligands as Efficient Electrocatalyst for Oxygen Evolution Reaction, ACS Applied Energy Materials, 2026, 9, 2755−2765 

68. Patra S. K.; Gogoi, J.; Rabha, M.; Khatua, S.* A Dual-Phase Luminescent Phosgene Sensor Based on an AIE-Active Ruthenium(II) Polypyridine Complex, Dalton Trans., 2026, 55, 4215-4225  

67. Baruah, K.; Gogoi, R.; Iyer, P. K.; Khatua, S.* Aggregation-Induced Emission and Thermally Activated Delayed Fluorescence in Sterically Encumbered Copper(I) Complexes of Diphosphine and Substituted Phenanthroline Ligand, Inorg. Chem., 2026, 65, 1, 79-94

66. Kashyap, N.; Neogi, S.; Gogoi, J.; Khatua, S.* and Hajra, A.* AIE-Active Cyclometalated Iridium(III) Complex-based Photocatalyst for Three-Component Sulfoximidotrifluoromethylation of Alkenes, Inorg. Chem., 2025, 64, 50, 24987–24997 

65. Rabha, M.; and Khatua, S.* An Organoiridium(III) Complex-Based Bifunctional Probe for Light-Up Detection of Phosgene and Nerve Agent Mimic Diethyl Chlorophosphate by Accessing the Suitable ³MLCT Excited State, Analytical Chemistry, 2025, 97, 48, 26770–26780  

64. Gogoi, J.; Rabha, M.; and Khatua, S.* An organoiridium(III) complex-based probe for rapid and highly selective dual channel detection of cyanide ions. New J. Chem., 2025, 49, 16778-16786  

63. Lyngkhoi, D. L.; and Khatua, S.*A Seven-membered Heterocycle Containing Coumarin Derivative with Aggregation Induced Emission Property, Prayogic Rasayan 2025, 9(1), 07 - 14  (Invited Article) (Cover page article)

62. Bhandari, S.; Sen, B.; Khatua, S.; Singh, L. R.; Parihar, V. S.; and Mahato M.*   Ruthenium complex based nanocomposite film with enhanced and selective electrochemical sensing of bifenthrin pesticide, RSC Advance, 2024, 40, 29542-29558 

61. Khatua, S.* Patra, S. K.; Rabha, M.; Lyngkhoi, D. L.; Gogoi, J.; and Sen, B.: A Dual State Emission Luminogen based on 1,3,3-trimethylindoline and chroman-2,4-dione Conjugate for Highly Selective Dual Channel Detection of Cyanide Ion. Sensors & Diagnostics 2024, 3, 1689–1698.

60. Lyngkhoi, D. L.; and Khatua, S.*: A coumarin containing hemicyanine-based probe for dual channel detection of cyanide ion. Inorganica Chimica Acta. 2024, 572,122300 (Invited Article for a special issue)

59. Kashyap, N.; Rabha, M.; Patra, S. K.; Sen, B.; Sheet, S. K.; Baruah, K.; and Khatua, S.*: Cyclometalated Iridium(III) Polypyridine Complexes for Luminescent Detection of Chlorinated Solvents. Cryst. Growth Des. 2024, 24, 3615−3631

58. Khatua, S.*; Rabha, M.; Nagappan, S.; Sen, B.; Baruah, K; and Kundu, S.* An Efficient Oxygen Evolution Reaction by Ru(II) Polypyridyl Complex-based AIEgen, Inorg. Chem. Front., 2024, 11, 1048-1060.  Cover Article (This article is part of the themed collection: 2024 Inorganic Chemistry Frontiers HOT articles)

57. Rabha, M.; Lyngkhoi, D. L.; Patra, S. K; Khatua, S.* AIE-active cyclometalated iridium(III) complexes for the highly efficient picric acid detection in aqueous media, Inorg. Chem. Front., 2024, 11, 1434–1449.

56. Kumar, N.; Lyngkhoi, D. L.; Gaikwad, S.; Samanta, J.; Ahamed, R.; Khatua, S.;* and Pramanik, S.* Excitation wavelength-dependent multi-coloured and white-light emissive pyrene-based hydrazones: suppression of Kasha's rule, Chem. Commun, 2023, 59, 14122-14125 

55. Kumar, N.; Lyngkhoi, D. L.; Gaikwad, S.; Samanta, D.; Khatua, S.; * and Pramanik, S.* Effect of Substituents on the Aggregation-Induced Emission of 9, 10-Phenanthraquinone-Hydrazones,  New J. Chem., 2023, 47, 15066–15075.

54. Rabha, M.; Sheet, S. K.; Sen, B.; Konthoujam, I.; Aguan, K.; Khatua, S.* Ruthenium(II) Complex-based Highly Specific Luminescence Light-up Probe for Detecting HOCl via C(sp²)-H Chlorination ChemistrySelect, 2023. 8, e20220464.

53. Patra, S. K.; Rabha, M.; Sen, B.; Aguan, K.; Khatua, S.*: Aggregation Induced Emission Active Bis-heteroleptic Ruthenium(II) Complex for Luminescent Light-up Detection of Pyrophosphate Ion. Dalton Trans., 2023, 52, 2592-2602.

52. Rabha, M.; Sen, B.; Sheet, S. K.; Aguan, K.; Khatua, S.*: Cyclometalated Iridium(III) Complex of a 1,2,3-Triazole-based Ligand for Highly Selective Sensing of Pyrophosphate Ion. Dalton Trans., 2022. 51, 11372–11380.

51. Kalita, G.; Khatua, S.; Chatterjee, P. N.: A Brønsted Acid Catalyzed Easy Access to Conjugated Diene-­Diones from Tertiary Propargyl Alcohols and 1,3-Dicarbonyl ­Compounds. Synlett 2023; 34(07), 815-822.

50. Bhunia, A.; Zangrando, E.; Khatua, S.; Manna, S. C.: Synthesis, crystal structure, electrochemistry and thermal analysis of an oxalato bridged Cr(III)-Pb(II) heterometallic coordination compound. J. Mol. Struct., 2022, 1267, 133562.

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49. Patra, S. K.; Sen, B.; Rabha, M.; Khatua, S.*: An aggregation-induced emission-active bis-heteroleptic ruthenium(II) complex of thiophenyl substituted phenanthroline for the selective “turn-off” detection of picric acid. New J. Chem., 2022, 46, 169-177.

48. Sen, B.; Patra, S. K.; Khatua, S.*: Ruthenium(II) Polypyridine Complex-Based Aggregation-Induced Emission Luminogen for Rapid and Selective Detection of Phosgene in Solution and in the Gas Phase. Inorg. Chem., 2021, 60, 19175–19188.

47. Sen, B.; Rabha, M.; Sheet, S. K.; Koner, D.; Saha, N.; Khatua, S.*: Bis-heteroleptic Ru(II) polypyridine complex-based luminescent probes for nerve agent simulant and organophosphate pesticide. Inorg. Chem. Front., 2021, 8, 669-683.

46. Sheet, S.K.; Rabha, M.; Sen, B.; Patra, S. K.; Aguan, K.; Khatua, S.*: Ruthenium(II) Complex-Based G-quadruplex DNA Selective Luminescent ′Light-up′ Probe for RNase H Activity Detection. ChemBioChem, 2021, 22, 2880-2887.

45. Sen, B.; Patra, S. K.; Rabha, M.; Sheet, S. K.; Aguan, K.; Samanta, D.; Khatua, S.*: Luminescence Detection of Ag+ and Phosphate Ions by a Ruthenium(II) Complex-based Multianalyte Probe: A Combined Spectroscopic, Crystallographic and Theoretical Approach. Eur. J. Inorg. Chem., 2021, 3549–3560.

44. Dutta, A.; Patra, S.K.; Khatua, S.; Nongkhlaw R.: Visible-light-mediated synthesis of 3, 4, 5-trisubstituted furan-2-one derivative via bifunctional based organo photocatalyst. New J. Chem., 2021, 45, 19329-19337.

43. Basu Baul, T. S.; Chaurasiya, A.; Rabha, M.; Khatua, S.; Ly??ka, A.; Schollmeyer, D.; Jurkschat, K.: Diorganotin Compounds Containing α-Aminoacidato Schiff Base Ligands Derived from Functionalized 2-Hydroxy-5-(aryldiazenyl)benzaldehyde. Syntheses, Structures and Sensing of Hydrogen Sulfide. Eur. J. Inorg. Chem., 2020, 1803–1813.

42. Kalita, G.; Paul, D.; Khatua, S.; Chatterjee, P. N.: para-Toluenesulfonic Acid Catalyzed Synthesis of Indenes via a Tandem Friedel–Crafts Alkylation/Hydroarylation of Tertiary Propargylic Alcohols with Electron Rich Arenes. Cat. Lett., 2020, 150, 2132–2139.

41. Sen, B.; Sheet, S. K.; Patra, S. K.; Koner, D.; Saha, N.; Khatua, S.*: Highly Selective Detection of Hypochlorous Acid by a Bis-heteroleptic Ru(II) Complex of Pyridyl-1,2,3-triazole Ligand via C(sp2)–H Hydroxylation. Inorg. Chem., 2019, 58, 9982−9991.

40. Paul, D.; Borah, A.; Khatua, S.; Chatterjee,: P. N.: para-Toluenesulfonic Acid-Catalyzed, Ultrasound-Promoted, One-Pot, Three-Component Coupling of Aldehydes, β-Dicarbonyls/Amides, and Electron-Rich Arenes. Asian J. Org. Chem., 2019, 8, 1870-1878.

39. Paul, D.; Khatua, S.; Chatterjee, P. N.: A facile iron-catalyzed dual C–C bond cleavage: an approach towards triarylmethanes. New J. Chem., 2019, 43, 10056.

38. Sawkmie, M. L.; Paul, D.; Khatua, S.; Chatterjee, P. N.: Active bismuth mediated allylation of carbonyls/N-tosyl aldimines and propargylation of aldehydes in water. J Chem Sci., 2019, 131.

37. Sheet, S. K.; Sen, B.; and Khatua, S.*: Organoiridium(III) Complexes as Luminescence Color Switching Probes for Selective Detection of Nerve Agent Simulant in Solution and Vapor Phase. Inorg. Chem., 2019, 58, 3635−3645. (Top 10 most downloaded article during March-April, 2019)

36. Paresh Nath Chatterjee, P. N.; Paul, D.; Sawkmie, M. L.; Sinha, A. K.; Khatua, S.: Synthesis, characterization of active Sn(0), and its application in selective propargylation of aldehyde at room temperature in water. Can. J. Chem., 2019, 97, 29-36.

35. Kharbani, D.; Khatua, S.; Soh, C.; Rymmai, E.K.: Uncoordination mode of ??0-Janus scorpionate with La(III) and Ce(III) complexes: Synthesis, characterization, thermolysis and crystal structure determination. J. Mol. Struc., 2019, 1176, 128-132.

34. Paul, D.; Khatua, S.; Chatterjee, P. N.: Iron-Catalyzed Tandem C-N and C–C bond Cleavage in Diaryl Methanamines: Use of Electron-Rich Arenes as Leaving Group to Generate Triaryl Methanes. Chem. Select., 2018, 3, 11649– 11656.

33. Patra, S. K.; Sen, B.; Sheet, S. K.; Banerjee, B.; Saha, N.; Khatua, S.*: Single molecular dualanalyte thio-urea based probes for colorimetric Hg2+ and fluorometric AcO− detection and its’ application in bioimaging. Inorg.Chim. Acta, 2019, 492, 119-130.

32. Bhattacharjee, D.; Sheet, S. K.; Khatua, S.; Biswas, K.; Joshi, S. R.; Myrboh, B.: A reusable magnetic nickel nanoparticle based catalyst for the aqueous synthesis of diverse heterocycles and their evaluation as potent anti-bacterial agent. Bioorg. & Medi. Chem., 2018, 26, 5018–5028.

31. Paul, D.; Rudra, S.; Rahman, P.; Khatua, S.; Pradhan, M.; Chatterjee, P. N.: Synthesis and characterization of Pd-γ-Fe2O3 nanocomposite and its application as a magnetically recyclable catalyst in ligand-free Suzuki-Miyaura reaction in water. J. Organom. Chem. 2018, 871, 96-102.

30. Sheet, S. K.; Sen, B.; Aguan, K.; Khatua, S.*: A cationic organoiridium(III) complex-based AIEgen for selective light-up detection of rRNA and nucleolar staining. Dalt. Trans., 2018, 47, 11477-11490.

29. Sheet, S. K.; Sen, B.; Patra, S. K.; Rabha, M.; Aguan, K.; Khatua, S.*: Aggregation-Induced Emission-Active Ruthenium(II) Complex of 4,7-Dichloro Phenanthroline for Selective Luminescent Detection and Ribosomal RNA Imaging. ACS Appl. Mater. Inter., 2018, 10, 14356−14366.

28. Patra, S. K; Sheet, S. K.; Sen, B.; Aguan, K.; Roy, D.R.; Khatua, S.*: Highly Sensitive Bifunctional Probe for Colorimetric Cyanide and Fluorometric H2S Detection and Bioimaging: Spontaneous Resolution, Aggregation, and Multicolor Fluorescence of Bisulfide Adduct. J. Org. Chem., 2017, 82, 10234−10246. (Top most downloaded article during Sept.-Oct., 2017)

27. Sheet, S. K.; Sen, B.; Thounaojam, R.; Aguan, K.; Khatua, S.*: A Ruthenium(II) Complex-Based Luminescent Bifunctional Probe for Ag+ and Phosphate Ions: Ag+ Assisted Detection and Imaging of rRNA. Inorg. Chem., 2017, 56, 1249−1263.

26. Sheet, S. K.; Sen, B.; Thounaojam, R.; Aguan, K.; Khatua, S.*: Highly selective light-up Al3+ sensing by a coumarin based Schiff base probe: Subsequent phosphate sensing DNA binding and live cell imaging. J. Photochem. & Photobio A: Chemistry, 2017, 332, 01–111.

25. Sen, B.; Sheet, S. K.; Thounaojam, R.; Jamatia, R.; Pal, A. K.; Aguan, K.; Khatua, S.*: A coumarin based Schiff base probe for selective fluorescence detection of Al3+ and its application in live cell imaging. Spectro. Acta Part A: Mole. & Biomol. Spect., 2017, 173, 537–543.

24. Nandi, S.; Islam, M. M.; Saha, M.; Mitra, S.; Khatua, S.; Pal, A. K.: Regioselective Synthesis of Functionalized [1,6]-Naphthyridines by KF/Basic Alumina as a Recyclable Catalyst and a Brief Study of Their Photophysical Properties. Synth. Comm., 2016, 46, 1461-1476.

23. Chowdhury, B.; Dutta, R; Khatua, S.; Ghosh, P: A Cyanuric Acid Platform Based Tripodal Bis-heteroleptic Ru(II) Complex of Click Generated Ligand for Selective Sensing of Phosphates via C-H anion Interaction. Inorg. Chem., 2016, 55, 259-271.

22. Chowdhury, B.; Khatua, S.; Dutta, R; Chakraborty, S; Ghosh, P: Bis-Heteroleptic Ruthenium(II) Complex of a Triazole Ligand as a Selective Probe for Phosphates. Inorg. Chem., 2014, 53, 8061-8070.

21. Sinha, A.; Khatua, S.; Bhattacharjee, M.: Synthesis and Structure of [Ru(PPh3)2(bipy)(MeCN)Cl][BPh4] and it's Catalytic Property towards Regioselective and Stereoselective Allylation of Phenols. J. Organomet. Chem., 2014, 770, 116-120.

20. Khatua, S.*; Schmittel, M.: A Single Molecular Light-up Sensor for Quantification of Hg2+ and Ag+ in Aqueous Medium: High Selectivity toward Hg2+ over Ag+ in a Mixture. Org. Lett., 2013, 15, 4422-4425.

19. Khatua, S.; Samanta, D.; Bats, J. W.; Schmittel, M.*: Rapid and Highly Sensitive Dual-Channel Detection of Cyanide by Bis-heteroleptic Ruthenium(II) Complexes. Inorg. Chem. 2012, 51, 7075–7086.

18. Khatua, S.; Kang, J.; Kim, K.; Huh, J. O.; Lee, J.; Hong, C. S.; Churchill, D. G*: Crystal Structures and Magnetic Properties of Newly Synthesized Mono- and Dinuclear CuII Schiff-Base Complexes. Eur. J. Inorg. Chem. 2010, 5018–5026.

17. Egorova, O. A.; Tsay, O. G.; Khatua, S.; Meka, B.; Maiti, N.; Kim, M.; Kwon S. J.; Huh, J. O.; Bucella, D.; Kang, S.; Kwak, J.; Churchill, D.G.*: Synthetic, Cyclic Voltammetric, Structural, EPR, and UV−Vis Spectroscopic Studies of Thienyl-Containing meso-A2B-cor(CrV???O) Systems: Consideration of Three Interrelated Molecular Detection Modalities. Inorg. Chem. 2010, 49, 502–512.

16. Khatua, S.; Kang, J.; Kim, K.; Huh, J. O.; Lee, J.; Hong, C. S.; Churchill,D. G*: Synthesis, Structure, and Magnetic Properties of Closely Related Mono- and Di-Cu(II) Schiff Base Complexes: Formation of Water Clusters and Hydrogen-Bonded Networks. Cryst. Growth Des. 2010, 10, 327–334.

15. Jun, T.; Ha, Y.; Kang, J.; Khatua, S.; Churchill, D. G.*: Mechanochemical versus sol–gel silica loading of phenolate- and acetate-bridged dizinc complexes: toward instant and inexpensive hybrids for controlled binding and release of Zn2+ in pure water. New J. Chem., 2010, 34, 2197-2204.

14. Khauta, S.; Kang, J.; Churchill, D. G.*: Direct dizinc displacement approach for efficient detection of Cu2+ in aqueous media: acetate versus phenolate bridging platforms. New J. Chem., 2010, 34, 1163-1169.

13. Khatua, S.; Kim, K.; Kang, J.; Huh, J. O.; Hong, C. S.; Churchill, D. G.*: Synthesis, Structure, Magnetic Properties and Aqueous Optical Citrate Detection of Chiral Dinuclear CuII Complexes. Eur. J. Inorg. Chem., 2009, 3266–3274.

12. Egorova, O. A.; Tsay, O. G.; Khatua, S.; Huh, J. O.; Churchill, D. G.*: A Chiral meso-ABC-Corrolatochromium(V) Complex. Inorg. Chem., 2009, 48, 4634–4636.

11. Khatua, S.; Choi, S. H.; Lee, J.; Kim, K.; Do, Y.; Churchill, D. G.*: Aqueous Fluorometric and Colorimetric Sensing of Phosphate Ions by a Fluorescent Dinuclear Zinc Complex. Inorg. Chem., 2009, 48, 2993–2999.

10. Khatua, S.; Choi, S. H.; Lee, J.; Huh, J. O.; Do, Y.; Churchill, D. G.*: Highly Selective Fluorescence Detection of Cu2+ in Water by Chiral Dimeric Zn2+ Complexes through Direct Displacement. Inorg. Chem., 2009, 48, 1799–1801.

9. Choi, S. H.; Kim, K.; Jeon, J.; Meka, B.; Bucella, D.; Pang, K.; Khatua, S.; Lee, J.; Churchill, D. G.*: Optical Effects of S-Oxidation and Mn+ Binding in meso-Thienyl Dipyrrin Systems and of Stepwise Bromination of 4,4-Difluoro-8-(2,5-dibromo-3-thienyl)-4-bora-3a, 4a-diaza-s-indacene. Inorg. Chem., 2008, 47, 11071–11083.

8. Khatua, S.; Roy, D. R.; Bultinck, P.; Bhattarcharjee, M.*; Chattaraj, P. K.*: Aromaticity in cyclic alkali clusters. Phys. Chem. Chem. Phys., 2008, 10, 2461-2474.

7. Dasgupta, S.; Khatua, S.; Bertolasi, V.; Bhattacharjee, M.*: Synthesis and characterization of copper(II) complexes containing tridentate modified amino acid ligands, [CuL(H2O)(Pyz)] [L = {(3,5-di-tert-butyl-2 hydroxybenzyl)amino}acetic acid and S(−)2-(3,5-di-tert-butyl-2-hydroxy-benzylamino)-3-methyl-butyric acid; Pyz = pyrazole] and their oxidation to a copper(III) coordinated phenoxyl radical. Polyhedron, 2007, 26, 2574-2580.

6. Khatua, S.; Roy, D. R.; Bhattacharjee, M.; Chattaraj, P. K.: Aromaticity in alkali metal clusters: Role of the metalloligand and the size of the metal ion. J. Comp. Meth. Sci. & Eng., 2007, 7, 395-408.

5. Hajra, S.*; Giri, A. K.; Karmakar, A.; Khatua, S.: Asymmetric aldol reactions under normal and inverse addition modes of the reagents. Chem. Commun., 2007, 2408-2410.

4. Khatua, S.; Harada, T.; Kuroda, R.; Bhattacharjee, M*: Solvent dependent assembly and disassembly of a hydrogen bonded helical structure in a Co–Mo bimetallic complex. Chem. Commun., 2007, 3927-3929.

3. Khatua, S.; Roy, D. R.; Chattaraj, P. K.; Bhattacharjee, M.*: Synthesis and structure of 1-D Na6 cluster chain with short Na–Na distance: Organic like aromaticity in inorganic metal cluster. Chem. Commun., 2007, 135-137.

2. Khatua, S.; Evans, H. S.; Harada, T.; Kuroda, R.; Bhattacharjee, M.*: Helicity Induction through Hydrogen Bonding and Spontaneous Resolution of a Bimetallic Nickel Complex Coordinated to an Octahedral Metalloligand. Inorg. Chem., 2006, 45, 9619–9621. (Amongst the top ten accessed on the web from the online version in October, 2006).

1.Khatua, S.; Dasgupta, S.; Biradha, K.; Bhattacharjee, M.*: Self-Assembly of an Alkali Metal Cluster Stabilized by a New Flexidentate Metalloligand: Formation and Structure of Heterobimetallic Na–Mo and Cs–Mo 2D Networks. Eur. J. Inorg. Chem.,2005, 5005–5010.

Publication in Conference

1. Churchill, D. G; Khatua, S.; Kang, J.; Jun, T.; and Kim, K.: P2-403: Novel molecular detection of Cu²⁺ in aqueous solution and related chemistry. Alzheimer's Association International Conference on Alzheimer's Disease 2010, Alzheimer's and Dementia, 2010, 6, S436- S437. DOI: https://doi.org/10.1016/j.jalz.2010.05.1456. (Impact factor: 21.56)

Details of Patents

1. Churchill, D. G.; Jun, T.; Ha, Y.; Kang, J.; Khatua, S.: Silica hybrid material with phenolate- and acetate-bridged dizinc-schiff base complex for controlled binding/release of Zn2+ in aqueous solution, and mechanochemical and sol-gel preparation method thereof. Repub. Korean Kongkae Taeho Kongbo (South Korean patent); KR 2012065149(A). Date of award: 20-06-2012.
2. Churchill, D. G.; Khatua, S.; Kim, K.; Kang, J.: Copper ion detection via direct displacement using dimeric zinc complexes and preparing method thereof. Repub. Korean Kongkae Taeho Kongbo (South Korean patent); KR 2011123586 (A); Date of award: 15-11-2011.
3. Churchill, D. G.; Khatua, S.; Kim, K.; Choi, S. H.: One-pot synthesis of chiral amino acid Schiff-base dinuclear complexes and their selective aqueous sensing of salts and ions. Repub. Korean Kongkae Taeho Kongbo (South Korean patent); KR 2011053733 (A); Date of award: 24-05-2011.

Conferences/ Symposia (selected)

1. S. Khatua, S. K. Sheet and B. Sen.; “Highly Selective Luminescent Sensing of Phosphates by Bis-Hetaroleptic Ruthenium(II) Complex”. REACH-2015-An International Symposium on Recent Advances in Chemistry 3^rd-5^th March, 2015.
2. Khatua, S.; Lin, H.; and Schmittel M.: Recent Advance in “Lab-on-a-Molecule” Chemosensors. 3rd EuCheMS Chemistry Congress, Nürnberg, Germany, August 29 – September 2, 2010.
3. Khatua, S.; Kim, K.; and Churchill, D. G.: Highly Efficient Aqueous Sensing of Cation and Anion by Fluorescent Dinuclear Zinc(II) Schiff Base Complexes. The 104th KCS National Meeting, Daejeon Convention Center, Republic of Korea, October 29-30, 2009.
4. Churchill, D. G.; Khatua, S.; Kim, K.; Choi, S. H.; Kang, J.; Huh, J. O.; Lee, J., and Hong, C. S.: Aqueous Luminescent Detection of Biological Phosphate Ions and Copper(II) by Fluorescent Dizinc Complexes and Magnetic Properties of Related Dicopper Complexes. Abstracts of Papers, 238th ACS National Meeting, Washington, DC, USA, August 16-20, 2009.
5. Khatua, S.; and Churchill, D. G.: Direct Displacement Approach for Highly Selective Fluorescence Detection of Cu2+ by Chiral Dimeric Zn2+ Complexes in Water. The 103^rd KCS National Meeting, COEX centre, Seoul, Republic of Korea, April 16-17, 2009.
6. Khatua, S.; Choi, S. H.; Lee, J.; Churchill, D. G.: Aqueous Fluorometric and Colorimetric Sensing of Phosphate Ions by a Fluorescent Dinuclear Zinc Complex of a Lysine-Based Ligand. Abstracts of Papers, 237th ACS National Meeting, Salt Lake City, UT, USA, March 22-26, 2009.
7. Kim, K.; Khatua, S.; and Churchill D. G.: Exploring Aqueous Citrate Optical Sensing with Cu(II) Complexes by Indicator Displacement Assays. The 10th KAIST-KYOTO Chemistry Symposium (First KAIST-KYOTO-TSING-HUA Chemistry Symposium) KAIST, Daejeon, Republic of Korea, 10-13th December, 2008. P7
8. Choi, S. H.; Kim, K.; Jeon, J.; Meka, B.; Bucella, D.; Pang, K.; Khatua, S.; Lee, J.; and Churchill, D. G.: Optical Effects S-oxidation and Mn+ Binding in Meso-thienyl Dipyrrin Systems, and of Stepwise Bromination in 4,4-difluoro-8- (2,5-dibromo-3-thienyl)-4-bora-3a,4a-dlaza-s-indacene. The 4th Asian Biological Inorganic Chemistry Conference (AsBIC IV), Ramada Hotel Plaza, Jeju Island, Republic of Korea, 10-14^th November, 2008. Page 79, YS17.
9. Khatua, S.; Choi, S. H.; Lee, J.; & Churchill, D. G.: Aqueous Ratiometric and Colorimetric Sensing of Pyrophosphate Ion (PPi) by a Fluorescent Dinuclear Zinc Complex of a Lysine-Based Ligand. The 4th Asian Biological Inorganic Chemistry Conference (AsBIC IV), Ramada Hotel Plaza, Jeju Island, Republic of Korea, 10-14^th November 2008.
10. Khatua, S.; Lee, J.; & Churchill, D. G.: Schiff Base Fluorescence Probe for Aqueous Ratiometric Zinc (II) Sensing. The 17th International Conference on Organic Synthesis (ICOS-17), Daejeon Convention Center, Republic of Korea, 22-27^th June 2008.
11. Khatua, S.; and Bhattacharjee, M.: Homochiral Heterobimetallic Hydrogen-Bonded Helical Network Constructed from Self Assembly of a Metalloligand with Co (II) Ion. 11^th Symposium on Modern Trends in Inorganic Chemistry (MTIC-X1), Department of Inorganic Chemistry, IIT, Delhi, India, 8-10^th December 2005.
12. Khatua, S.; Dasgupta, S.; Biradha, K.; and Bhattacharjee, M.: Design, Synthesis, and Structure of a Molybdenum Oxo Cluster Containing Entrapped Sodium Ion. 10th Symposium on Modern Trends in Inorganic Chemistry (MTIC-X), Department of Inorganic Chemistry, IIT, Bombay, India, 15-17^th December 2003.

Invited lecture in conference/symposia/refresher and orientation course.

1. Invited lecture on “Excited-State Synergy in Heteroleptic Metal Complexes: A Route to High-Performance Sensors and Bioimaging Agents” at SCBIER-2025 during December 4-5, 2025, Mugberia Mahavidyalaya, West Bengal.
2. Invited lecture on “Ligand-Driven Excited-State Modulation in bis-Heteroleptic d??? Metal Complexes for Sensing and Bioimaging” at a workshop on 'Sustainability in Chemical Sciences' (SCS 2025) during December 3-4, 2025, as a part of 'Scientific Social Responsibility', IISER Kolkata.
3. Invited lecture on “Excited-State Interplay in Heteroleptic d⁶/d¹⁰ Complexes for High-Performance Sensing and Bioimaging, at IACBS-2025 from December 1-2, 2025 IIT(ISM) Dhanbad.
4. Invited lecture on “Triplet Emitting d⁶ and d¹⁰ Metal Polypyridyl Complexes for Sensing and Bioimaging” RAC 2025 held from 30^th October -1^st November, 2025, NIT Meghalaya.
5. Chaired a Technical Session at RAC 2025 held from 30^th October -1^st November, 2025, NIT Meghalaya.
6. Invited lecture on “Vikshit Bharat” and Bis-Heteroleptic d⁶ Metal Polypyridyl Complexes for Sensing and Bioimaging on National Science Day celebration, NIT Meghalaya, February 28, 2025.
7. Invited lecture on “Photoactive d⁶ metal polypyridine complexes for sensing and biological applications” at National Conference on Luminescence and its Applications (NCLA-2024), held on 28^th -30^th August, 2024 at Department of Physics, NEHU, Shillong.
8. CRS bronze medal award lecture on “Photoactive d⁶ Metal Polypyridine Complexes for Sensing and Biological Applications at CRS Symposium 2024 – Rasayan 19, "Sustainability and Interdisciplinary in Chemical Sciences" (SICS) at IISER Kolkata, 29-30^th July 2024.
9. Presented a poster upon invitation in the brainstorming session in Future Oriented Research Conferences & Exhibitions (FORCE) Interdisciplinary Initiatives in Chemical Sciences (IICS), FORCE–IICS–2023, Hyatt Regency, Kathmandu, Nepal, September 28 – October 1, 2023.
10. Chaired a Technical Session at Sustainability & Interdisciplinary in Chemical Sciences (SICS-2023) Conference at IISER Kolkata July 13-15, 2023.
11. Invited lecture on “Research fellowship and research grant: Writing report, manuscript and thesis. UGC-Academic Staff College, NEHU, Shillong, 6^th March, 2023.
12. Invited lecture on “Publication on research findings: Writing report, manuscript and thesis. UGC-Academic Staff College, NEHU, Shillong, 16^th February, 2023.
13. Invited lecture on “Design, synthesis and application of ruthenium(II) and iridium(III)  polypyridine complex-based triplet emitters at CSIT, IISER Thiruvananthapuram, 4^th February 2023.
14. Invited lecture on “Design and construction of triplet emitting d⁶-metal polypyridine complexes: Sensing and bioimaging application at IISER Kolkata, 18^th January 2023.
15. Invited lecture on “Luminescence tuning of d6-metal polypyridine complexes for sensing and bioimaging” on International Conference on Recent Trends in Chemical Sciences (RTCS-2021), by Indian chemical society, at IIT, Guwahati, December 22-23, 2021.
16. Invited lecture on “Development on metal complex-based materials for sensing toxic and bio-relevant species” at Refresher course on the theme “Materials Science and Nanotechnology", NEHU, Shillong September 21, 2021.
17. Invited Lecture at National Seminar and Discussion Meeting on 150th anniversary of Periodic Table (NSDPT-2020), March 13-14, 2020, Dept. of Chemistry, NEHU, Shillong, Meghalaya.
18. Invited lecture on “Ru(II) and Ir(III) based luminescent probes for bio-relevant species and chemical warfare agents detection” at Interaction Meeting of Alumni and Faculties of Department of Chemistry, IIT Kharagpur 30^th March 2019.
19. Invited Lecture on Development of chemical sensors for bio-relevant species, environmental hazards and chemical warfare agents: Special Summer School in Basic Sciences & Technology, UGC-Academic Staff College, NEHU, Shillong, 11^th July, 2019.
20. Invited lecture on “Tuning the luminescence of Ru(II) and Ir(III) complexes for sensing and bioimaging” at RAC-2019, NIT, Meghalaya, October 14 – 15, 2019.
21. Invited lecture at Modern trends in Inorganic Chemistry (MTIC)–XVIII, IIT Guwahati December 10-14, 2019.
22. Invited lecture on Photoluminescent d6-metal complex-based probes for the detection of biorelevant species and chemical warfare agents” at Frontiers in Chemical Sciences (FICS)–2018, IIT Guwahati, December 6-8, 2018.
23. Invited lecture at RTCS, NIT Meghalaya, Shillong, October 12-13, 2017.
24. Invited Lecture on Research Methodology: UGC-Academic Staff College, NEHU, Shillong, 12^th November., 2015.
25. Invited Lecture on Research Methodology: UGC-Academic Staff College, NEHU, Shillong, 14^th October, 2015.
26. Invited Lecture on Publication of Research Findings: UGC Academic Staff College, NEHU, Shillong, 20^th August, 2015.
27. Invited Lecture on Environmental, Biological Problems and CHEMISTRY: UGC-Academic Staff College, NEHU, Shillong, 7^th July, 2015.
28. Invited Lecture on “Molecular Sensors/Probes for Sensing Environmentally Hazardous Ions and Biologically Relevant Species (NTCE-2014), Don Bosco College, Tura, Meghalaya, India. 10^th -11^th Dec, 2014.

Present Group Member

Mr. Jogat Gogoi
Junior research fellow (JRF)
Joined: November 2021
Education: MSc., Mizoram University, 2018
Email: jogatchem24@gmail.com

Dip Jyoti Kalita
SERB project fellow (JRF)
Joined: December 2024
Education: MSc., NEHU, 2023
Email: dipjyotikalita23456@gmail.com 

Justflorisa Dora Kynjing
NEHU, Non-Net Fellow
Joined: February, 2026
Education: MSc., NEHU, 2021

Alumni 

1. Dr. Khanindram Baruah, 2026
2. Dr. Deikrisha L. Lyngkhoi, 2025
   Present position: Assistant Professor, St. Edmund's College, Shillong.
3. Dr. Nimisha Kashyap, 2024 
4. Dr. Monosh Rabha, 2023
   Present position: Post Doctoral Fellow, POSTECH, South Korea
5. Dr. Sumit Kumar Patra, 2021
   Present position: Post Doctoral fellow, Nicolaus Copurnicus University, Poland
6. Dr. Bhaskar Sen, 2020 
   Present position: Research Scientist, Phytotron Research Centre, Bangalore
7. Dr. Sanjoy Kumar Sheet, 2019
   Present position: Scientist, CSIR-National Physical Laboratory (NPL), New Delhi

MSc Project Student

• Mr. Sugali Sai Sridhar Naik, 2026
• Ms. H. Priya Devi, 2026
• Ms. Wansaka Langbang, 2026
• Ms. Bala Ai Jinghun Lyngdoh, 2026
• Ms. Nafisa Sulatana, 2025
• Ms. Phibakorshisha A Mawlong, 2025
• Ms. Pdianghun Lyngdoh , 2025
• Mr. Obestar K Dewsaw, 2025
• Ms. Moleka Basumatary, 2024
• Ms. Enika Nongkynrih, 2024
• Ms. Lamdaka Synnah, 2024
• Ms. Vahdeikim Singsit, 2023 (PhD Scholar, IIT Guwahati)
• Ms. Sukanya Dutta, 2023
• Ms. Idakmen Shisha Marbaniang, 2023
• Ms. Mrigakshi Chakravorty, 2022
• Ms. Phibawanrisa Kharumnuid, 2022
• Ms. Naphisabet Nongkhlaw, 2022 (PhD Scholar, NEHU)
• Ms. Tonangkiew Lamare, 2021
• Ms. Phinda Diengdoh, 2021
• Ms. Bidanchi Sangma, 2021
• Mr. Roopjyoti Mishra, 2020 (PhD Scholar, IIT Guwahati)
• Ms. Upasona Dutta, 2020
• Ms. Anusuya Chakraborty, 2020
• Ms. Tanaya Saha, 2019
• Ms. Loveleena Khanikar, 2019 (PhD Scholar, NIT Silchar)
• Dr. Deikrisha Lyngdoh Lyngkhoi, 2019 (Assistant Professor, St. Edmund's College, Shillong)
• Dr. Mini Loya, 2018 (Post Doc, Ewha Womens University, South Korea)
• Ms. Paleisha Marwein, 2018
• Mr. Haris Varghese, 2017
• Mr. Banteilang Lyngdoh Nonglait, 2017
• Dr. Bietlaichhai Hlychho, 2017 (PhD, NEHU)
• Dr. Lathewdeipor Shadap, 2016 (Assistant Professor, Shillong College)
• Ms. Hage Ampi, 2016
• Mr. Suman Saha, 2015 (Teacher, Dalu Bengali Deficit Secondary School, Meghalaya)
• Dr. Monosh Rabha, 2015 (Postdoc, POSTECH, South Korea)
• Dr. John Elisa Kumar, 2014 (RA, ICT, Mumbai)
• Dr. Winaki P Sohtun, 2014 (Assistant Professor, Shillong)