Professional Experience:

• Guest Faculty, Nagaland University, Lumani Campus, Nagaland (2010)
• Visiting Fellow, Tata Institute of Fundamental Research, Mumbai (2010-2011)
• Assistant Professor, Assam University, Silchar (2011-2023)
• Associate Professor, North-Eastern Hill University, Shillong (2023-till now)

Academic Affiliation:

• Life Member, Indian Society for Radiation and Photochemical Sciences (ISRAPS)
• Life Member, Indian Society for Surface Science and Technology (ISSST)
• Life Member, Luminescence Society of India (LSI)
• Life Member, Indian Chemical Society (ICS)
• Life Member, Indian Council of Chemists (ICC)
• Life Member, Society for Materials Chemistry (SMC)

Administrative Experience:

• Member, Research Advisory Committee (RAC)
• Member, Board of Post-Graduate Studies (BPGS)
• Member, Board of Under-Graduate Studies (BUGS)
• Department Co-ordinator, Career Counselling and Placement Cell (CCPC)
• Department Co-ordinator, Internal Quality Assurance Cell (IQAC)

Academic Activities:

Area of Teaching and Research Interests:

• Area of Teaching:

• Molecular Spectroscopy
• Quantum Chemistry
• Surface Chemistry
• Chemical Kinetics

• Research Interests:
  • Chemosensory Materials
  • Spectroscopy and Excited State Dynamics Processes
  • Ligand-DNA /Protein Interaction & Photochemistry of Organic Biomolecules

Research Projects

Research Projects Completed: 03

• “Development of intracellular fluorescent chemosensor for various metal ions using experimental and computational methods”. Science and Engineering Research Board (SERB), Government of India (2019-2023), Sanctioned Amount: Rs. 36.57 lakhs.
• “Synthesis and Spectroscopic Characterization of a Novel Class of Schiff Base: A New Fluorescent Chemosensory Materials and Second Order Nonlinear Optical Properties”. Science and Engineering Research Board (SERB), Government of India (2014-2017), Sanctioned Amount: Rs. 24.50 lakhs.
• “Synthesis, Structural and Photophysical properties of a novel class of Schiff base: A New Fluorescent Chemosensory Materials”. University Grants Commission (UGC), Government of India (2012-2014), Sanctioned Amount: Rs. 6.00 lakhs.

Research Guidance:

Ph. D. Thesis Awarded / Submitted: 02

• Mr. Nayan Roy: Fluorescence modulation by selected transition metal ions in Schiff-based systems (2019)
• Mrs. Surjatapa Nath: Fluorescence modulation of some selected donor-acceptor systems in homogeneous and micro-heterogeneous environments (2023)

P.G. Dissertation: 37

Publications

Book publication: 01

1. “Intramolecular Charge Transfer in Cinnamic Acid Derivatives”. S. Mitra, T. Sanjoy Singh, Lap Lambert Academic Publishing, Germany; 2014, Pages: 1-165.

Journal publications: 31

1. “Solvent effects on the photophysical properties of a donor-acceptor based Schiff base”. Surjatapa Nath, Barnali Bhattacharya, Utpal Sarkar, T. Sanjoy Singh, J. Fluoresc., 2022, 32, 1321-1336 (Impact Factor 2.217).
2. “Photophysical investigation of a donor-acceptor based Schiff base in solvents of varying polarities”. Surjatapa Nath, Barnali Bhattacharya, Utpal Sarkar, T. Sanjoy Singh, J. Mol. Struct., 2022, 1255, 132435-132445 (Impact Factor 3.19).
3. “Cavity size dependent stoichiometry of probe-cyclodextrin complexation: Experimental and molecular docking demonstration”. Sinjan Das, Surjatapa Nath, T. Sanjoy Singh, Nitin Chattopadhyay J. Photochem. & Photobiol. A: Chem., 2020, 388, 112158-112166 (Impact Factor 4.291).
4. “Photophysics of a coumarin based Schiff base in solvents of varying polarities”. Saptarshi Ghosh, Nayan Roy, T. Sanjoy Singh, Nitin Chattopadhyay, Spectrochim. Acta Part A.  Mol. and Bimol. Spectro., 2018, 188, 252-257 (Impact Factor 4.098).
5. “Fluorescence behavior of Schiff base-N, N′-bis(salicylidene) trans 1, 2diaminocyclohexane in proteinous and micellar environments”. Nayan Roy, Surjatapa Nath, Pradip C. Paul, T. Sanjoy Singh, J. Fluoresc., 2017, 27, 2295-2311 (Impact Factor 2.217).
6. “Coumarin Based Fluorescent Probe for Colorimetric Detection of Fe³⁺ and Fluorescence Turn On-Off Response of Zn²⁺and Cu²⁺”. Nayan Roy, Abhijit Dutta, Paritosh Mondal, Pradip C. Paul, T. Sanjoy Singh, J. Fluoresc., 2017, 27, 1307-1321 (Impact Factor 2.217).
7. “Modulation of ESIPT fluorescence in o-hydroxy acetophenone derivatives: A comparative study in different bio-mimicking aqueous interfaces”. P. M. Gashnga, T. Sanjoy Singh, Sivaprasad Mitra. J. Mol. Liq., 2016, 218, 549-557 (Impact Factor 5.85).
8. “A new coumarin based dual functional chemosensor for colorimetric detection of Fe³⁺ and fluorescence turn-on response of Zn^2+”. Nayan Roy, Abhijit Dutta, Paritosh Mondal, Pradip C. Paul, T. Sanjoy Singh, Sensors and Actuators: B. Chem., 2016, 236,719-731 (Impact Factor 7.46).
9. “A highly efficient and selective coumarin based fluorescent probe for colorimetric detection of Fe³⁺ and fluorescence dual sensing of Zn²⁺ and Cu^2+”. Nayan Roy, Surjatapa Nath, Abhijit Dutta, Paritosh Mondal, Pradip C. Paul, T. Sanjoy Singh, RSC Advances, 2016, 6, 63837-63847 (Impact Factor 3.36).
10. “Fluorescence characteristics of Schiff base-N, N^/bis (salicylidene) trans 1,2 diaminocyclohexane in the presence of bile acid host”. Nayan Roy, Pradip C. Paul, T. Sanjoy Singh, J. Mol. Liq., 2015, 211, 1052-1059 (Impact Factor 5.85).
11. “A new turn-on fluorescent chemosensor based on sensitive Schiff base for Mn²⁺ ion”. Nayan Roy, Abhijit Dutta, Paritosh Mondal, Pradip C. Paul, T. Sanjoy Singh, J. Lumines., 2015, 165,167-173 (Impact Factor 3.599).
12. “Fluorescence properties of Schiff base – N, N^/-bis(salicylidene) - 1, 2-phenylenediamine in presence of bile acid host”. Nayan Roy, Pradip C. Paul, T. Sanjoy Singh, Spectrochim. Acta Part A.  Mol. and Bimol. Spectro., 2015, 142,331-338 (Impact Factor 4.098).
13. “A highly sensitive and selective fluorescent chemosensor for detection of Zn²⁺ based on a Schiff base”. Nayan Roy, Harun A. R. Pramanik, Pradip C. Paul, T. Sanjoy Singh, Spectrochim. Acta Part A.  Mol. and Bimol. Spectro., 2015, 140,150-155 (Impact Factor 4.098).
14. “A Sensitive Schiff-Base Fluorescent Chemosensor for the Selective Detection of Zn^2+”. Nayan Roy, Harun A. R. Pramanik, Pradip C. Paul, T. Sanjoy Singh, J. Fluoresc., 2014, 24, 1099-1106 (Impact Factor 2.217).
15. “Photophysical properties and excited state intramolecular proton transfer in 2-hydroxy-5-[(E)-(4-methoxyphenyl) diazenyl]benzoic acid in homogeneous solvents and micro-heterogeneous environments”. P. M. Gashnga, T. Sanjoy Singh, Tushar S. Basu Baul, S. Mitra, J. Lumines., 2014, 148,134-142 (Impact Factor 3.599).
16. “Fluorescent chemosensor based on sensitive Schiff base for selective detection of Zn²⁺”. T. Sanjoy Singh, Pradip C. Paul, Harun A.R. Pramanik, Spectrochim. Acta Part A.  Mol. and Bimol. Spectro., 2014, 121, 520-526 (Impact Factor 4.098).
17. “Studies on the inclusion complexation between Intramolecular CT probe trans-ethyl p-(dimethylamino) cinamate and β-cyclodextrin in presence of ionic and non-ionic surfactants”. T Sanjoy Singh, S. Mitra, J. Lumines., 2013, 143, 120-127 (Impact Factor 3.599).
18. “Modulation of intramolecular Charge transfer fluorescence of cinnamic acid derivatives in presence of albumins”. T. Sanjoy Singh, S. Mitra, ISRAPS Bulletin, 2013.
19. “GTP binding leads to narrowing of conformer population while preserving the structure of a RNA aptamer: a time-resolved site-specific fluorescence dynamics study”. T. Sanjoy Singh, B. J. Rao, G. Krishnamoorthy, Biochemistry, 2012, 51, 9260-9269 (Impact Factor 3.162).
20. A Fluorescence Study on Intramolecular Charge Transfer Probe in Different Constrained Environments. T. Sanjoy Singh, Keanean Journal of Science, 2012, 1, 100-107.
21. “Interaction of Cinnamic Acid Derivatives with Serum Albumins: A Fluorescence Spectroscopic Study”. T. Sanjoy Singh, S. Mitra. Spectrochim. Acta Part A.  Mol. and Bimol. Spectro., 2011, 78, 942-948 (Impact Factor 4.098).
22. “Interaction of charge transfer fluorescence probe with nonionic surfactants: Estimation of physico-chemical properties and binding constant”.  T. Sanjoy Singh, S. Mitra. Eur. J. Chem., 2010, 4, 341-347 (Impact Factor 0.5088).
23. “Fluorescence properties of trans-ethyl-p- (dimethylamino) cinnamate in presence of bile acid host”. T. Sanjoy Singh, S. Mitra.  J. Photochem. Photobiol. B: Biol., 2009, 96,193-200 (Impact Factor 6.252).
24. “Fluorimetric Study on the Charge Transfer Behavior of trans-ethyl p- (dimethylamino) cinnamate and its Derivatives in Cyclodextrin Cavities”. T. Sanjoy Singh, S. Mitra.  J. Incl.  Phen.  & Macrocycl.  Chem., 2009, 63, 335-346 (Impact Factor 1.633).
25. “Effect of Solvent Hydrogen Bonding on the Photophysical Properties of Intramolecular Charge Transfer probe trans-ethyl p-(dimethylamino) cinnamate and its Derivatives”. T. Sanjoy Singh, N.S. Moyon, S. Mitra.  Spectrochim. Acta: Part A. Mol. & Biomol. Spectro., 2009, 73, 630-636 (Impact Factor 4.098).
26. “Fluorescence Studies on the Photophysical Properties and Encapsulation behavior of Acetaminophen in Different Environments”. N.S. Moyon, T. Sanjoy Singh, S. Mitra. Biophys. Chem., 2008, 138, 55-62 (Impact Factor 2.352).
27. “Fluorimetric studies on the binding of 4-(dimethylamino) cinnamic acid with micelles and bovine serum albumin”. T. Sanjoy Singh, S. Mitra.  Photochem. Photobiol. Sci., 2008, 7, 1063-1070 (Impact Factor 3.982).
28. “A Combined Experimental and Theoretical Study on Photoinduced Intramolecular Charge Transfer in trans-ethyl p-(dimethylamino) cinamate”. T. Sanjoy Singh, S. Mitra, A. K. Chandra, N. Tamai, S. Kar, J. Photochem. & Photobiol. A: Chem., 2008, 197, 295-305 (Impact Factor 4.291).
29. “Experimental and Computational Study on Photophysical Properties of Substituted o-hydroxy Acetophenone Derivatives: Intramolecular Proton Transfer and Solvent Effect”. S. Mitra, T. Sanjoy Singh, A. Mandal, S. Mukherjee, Chem. Phys., 2007, 342, 309-317 (Impact Factor 2.348).
30. “Fluorescence behavior of intramolecular charge transfer state in trans-ethyl p-(dimethylamino)cinamate”. T. Sanjoy Singh, S. Mitra, J. Lumines., 2007, 127, 508-514 (Impact Factor 3.599).
31. “Fluorescence behavior of intramolecular charge transfer probe in anionic, cationic and non-ionic micelles”. T. Sanjoy Singh, S. Mitra, J. Colloid & Inter Sci., 2007, 311, 128-134 (Impact Factor 8.128).

Paper presented in Conferences/Seminar/Workshop:

1. “Fluorescent Chemosensor: Synthesis, Photophysical studies and its bioimaging applications”, National Conference on Recent Advances in Chemical Sciences (NCRACS- 2023) organised by P. G. Department of Chemistry, Berhampur University Odisha, India during 19-20, March 2023.
2. “Photophysical studies of donor-acceptor systems in varying solvents polarities”, National Conference on Smart Material for Future Technology (NCSMFT-2022) organised by Department of Nanotechnology, North-Eastern Hill University, Shillong, India during 29-30, November, 2022.
3. “Photophysics of donor-acceptor based Schiff base systems in varying solvents polarities”, National Conference on Advances in Chemical Research (ACR-2022) organized by Department of Chemistry, Manipur University, Imphal during 22-23, April, 2022.
4. “Fluorescent Chemosensors for Cations”, National Seminar on Emerging Research in Chemical Sciences (ERCS-2022) organised by Department of Chemistry, D.M. College of Science, Dhanamanjuri University, Imphal during 11-12, April, 2022.
5. “Spectroscopy of donor-acceptor based Schiff base in solvents of varying polarities”, National Seminar on Recent Trends in Physics Research organised by Department of Physics, Manipur University, Imphal during 21-22, February, 2022.
6. “Photoinduced Intramolecular Charge Transfer Phenomena in Donor-Acceptors systems”, Workshop on Modern Instruments in Biological Sciences (WMIBS-2020) organised by IIT Guwahati and Manipur University, Imphal, India during 28-29, February 2020.
7. “Coumarin-Based Dual Functional Chemosensors for Cations”, National Symposium on Recent Trends in Chemistry (RTC-2019) organised by North-Eastern Hill University, Shillong, India during 31^st Oct-1^st Nov. 2019.
8. “A fluorescence spectroscopic study of Schiff base-2-((E)-(quinolin-8-ylimino)methyl) quinolin-8-ol in different bio-mimicking aqueous interfaces”, International Conference on “Recent Trends of Chemical & Biological Sciences in Medicine, Natural Product and Drug Discovery (IC-RTCBSMNPDD)-2017” organised by P. G. Dept. of Chemistry, Berhampur University Odisha, India during 03-05, March 2017.
9. “Fluorescence behavior of Schiff base-N, N^/-bis(salicylidene) trans 1, 2 - diaminocyclohexane in biomimetic environments”, North East Regional Seminar on Trends in Colloid and Interface Science (NERSTCIS-2014) organised by North-Eastern Hill University, Shillong, India during 27-28, November 2014.
10. “Site-Specific Time Resolved Fluorescence Dynamics Study in a GTP-Binding RNA-Aptamer”, Sustainable Chemistry: Frontier Challenge (SCFC-2014) organised by North-Eastern Hill University, Shillong, India during February 27 to March 1, 2014.
11. “Site-Specific Time Resolved Fluorescence Dynamics Study in Riboswitches”, National Symposium on Recent Trends and Chemical Sciences (NSRTCS-2013) organised by Manipur University, Imphal, India during 22-23, March 2013.
12. “GTP binding leads to narrowing of conformer population while preserving the structure of a RNA aptamer: a time-resolved site-specific fluorescence dynamics study”, Workshop in Fluorescence Correlation Spectroscopy (FCS-2012) organised by Saha Institute of Nuclear Physics and Indian Institute of Chemical Biology, Kolkata, India during 03-07, December 2012.
13. “Photo-induced Intramolecular Charge Transfer Behavior of Representative Donor-Acceptor Systems in Several Homogeneous Environments”, National Conference on Frontiers in Chemical Sciences (NCFCS-2012) organised by Manipur University, Imphal, India during 21-22, March 2012.
14.  “Photophysics on intramolecular charge transfer probe in varying solvents”, National Workshop on Fluorescence correlation Spectroscopy and Biophotonics (FCS-2010) organised by North-Eastern Hill University, Shillong, India during 8-13, November 2010.
15. “Interaction of Charge Transfer Fluorescence Probe with Nonionic surfactants: Estimation of Physico-Chemical Properties and Binding Constant”, 3^rd Asia Pacific Symposium on Radiation Chemistry (APSRC-2010) and Trombay Symposium on Radiation and Photochemistry (TSRP-2010) Lonavala, India organised by Bhabha Atomic Research Centre, Mumbai, India during 14-17, September 2010.
16. “A Combined Experimental and Theoretical study on representative photo-induced intramolecular photoprocesses”, National Symposium on Recent Development and Trends in Computational Chemistry (RDTCC-2010) organised by North-Eastern Hill University, Shillong, India during 12-13, March 2010.
17. “Fluorescence Behavior of Intramolecular Charge Transfer Probe in Biomimetic Environments”, Fluorescence in Biology: An International Conference - Fluorescence 2009 organised by Tata Institute of Fundamental Research, Mumbai, India during 16-19, March 2009.
18. “Spectroscopy of trans-ethyl-p-(dimethylamino) cinnamate in various solvents”, Trombay Symposium on Radiation and Photochemistry (TSRP-2008) YASHADA, Pune, India organised by Bhabha Atomic Research Centre, Mumbai, India during 7-11, January 2008.
19. “Solvent Dependent Photophysics of o-hydroxy acetophenone Derivatives: A Combined Fluorescence and TDDFT Approach”, 2^nd Mid-year Symposium of Chemical Research Society of India (CRSI) organised by IIT Guwahati, India on 21^st July 2007.
20. “Fluorescence Behavior of Intramolecular Charge Transfer Probe in Homogeneous and Micellar Media”, National Symposium on Radiation and Photochemistry (NSRP-2007) organised by National Centre for Ultrafast Processes, University of Madras, Chennai, India during 29-31, March 2007.

Orientation/Refresher/Workshop/Equivalent Course(s) attended:

1. Refresher Course in Chemistry sponsored by UGC, New Delhi held on October 21- November 3, 2021 at North-Eastern Hill University, Shillong.
2. Faculty Development Programme on Advanced Research Methodology 2.0 sponsored by UGC, New Delhi held on June 17-July 1, 2021 at Teaching Learning Centre, Ramanujan College, University of Delhi, New Delhi.
3. Indo-US Webinar and Lecture Series under the aegis of Minister of Education, Government of India held on June 1-9, 2021 at Jamia Millia Islamia, New Delhi
4. Winter School on Research Methodology in Mathematical and Physical Sciences sponsored by UGC, New Delhi held on March 16-28, 2020 at Manipur University, Canchipur, Imphal.
5. Special Summer School in Basic Sciences and Technology sponsored by UGC, New Delhi held on July 8-21, 2019 at North-Eastern Hill University, Shillong.
6. Refresher Course in Advances in Chemistry, Biotechnology and Allied Disciplines sponsored by UGC, New Delhi held on June 11-July 2, 2015 at Manipur University, Canchipur, Imphal.
7. Orientation Course sponsored by UGC, New Delhi held on March 4-31, 2014 at Mizoram University, Aizawl.
8. Workshop in Fluorescence Correlation Spectroscopy sponsored by DIT, New Delhi held on March 7-24, 2009 at Tata Institute of Fundamental Research, Mumbai, India.
9. SERC School on Laser Spectroscopy and Applications in Science and Technology sponsored by DST, New Delhi held on November 3-21, 2008 at Bhabha Atomic Research Centre, Mumbai, India.

Selected as Reviewer for journals:

Spectrochimica Acta Part A: Mol. and Bio. Spectroscopy (Elsevier), Analyst (Royal Society of Chemistry), Luminescence (John Wiley & Sons, Ltd.), Sensors and Actuators: B. Chemical (Elsevier), Research on Chemical Intermediates (Springer), Chemical Communications (Royal Society of Chemistry), Dalton Transactions (Royal Society of Chemistry), RSC Advances (Royal Society of Chemistry), Analytical Chimica Acta (Elsevier), Journal of Molecular Liquids (Elsevier), Journal of Photochemistry and Photobiology A: Chemistry (Elsevier), Journal of Chemical Sciences (Springer), Journal of Fluorescence (Springer).