Welcome to Samanta's Research Group





Profile




Education




Academic Appoinments




Awards/Recognition Received




Collaborative Visits Abroad


Institute
Period
Support
Kanagawa University, Shonan Hiratsuka Campus, Japan Dec 3 - Dec 11, 2017 DST-JSPS
Tokyo Institute of Technology, Tokyo, Japan Dec 12 - Dec 21, 2016 DST-JSPS
Tokyo Institute of Technology, Tokyo, Japan Nov 25 - Dec 8, 2012 DST-JSPS
Tokyo Institute of Technology, Tokyo, Japan Dec 11 - Dec 23, 2011 DST-JSPS
Tokyo Institute of Technology, Tokyo, Japan Jun 2 - Jun 30, 2010 DST-JSPS
Tohoku University, Sendai, Japan Jun 12 - Jul 2, 2008 DST-JSPS
Tohoku University, Sendai, Japan Nov - Dec, 2007 DST-JSPS
University of Tokyo, Tokyo, Japan Dec., 2005 (10 days) DST-JSPS
University of Tokyo, Tokyo, Japan Dec., 2004 (3 weeks) DST-JSPS
University of Tokyo, Tokyo, Japan Dec., 2003 (3 weeks) DST-JSPS
University of Tokyo, Tokyo, Japan May, 2002 (3 weeks) DST-JSPS
University of Tokyo, Tokyo, Japan Jun.- Jul., '01 (7 weeks) DST-JSPS
Max Planck Institute, Göttingen, Germany Nov.- Dec., '00 (3 weeks) DST-DAAD
Radiation Laboratory, University of Notre Dame, USA May '99 -Apr. '00 RADIATION LABORATORY
Max Planck Institute, Göttingen, Germany May - Jul.,'97 DST-DAAD
Radiation Laboratory, University of Notre Dame, USA May - Jun., '94 RADIATION LABORATORY
Radiation Laboratory, University of Notre Dame, USA May -Jun., '92 RADIATION LABORATORY



Membership of Committees




Ph.D. Thesis Supervision

  1. Sudipta Seth (2014 - 2019), "Single-Paricle Photoluminescence and Carrier Dynamics of Cesium Lead Halide Perovskites and Related Materials".
  2. Navendu Mandal (2012 - 2018), "Ultrafast Carrier Dynamics of Composition tunable Perovskite and Semiconductor Nanocomposites".
  3. M. Chandra Sekhar (2010 - 2016), "Ultrafast Transient Absorption and Fluorescence Studies on the Stability and Charge Separation/ Recombination Dynamics of Semiconductor Nanocrystals in Presence of Some Molecular Systems".
  4. Ashok Pabbathi (2010 - 2015), "Fluorescence Correlation Spectroscopic Study of the Stability and Conformational Dynamics of Protins and DNA in the Presence of Organic Solvent and Ionic Liquids".
  5. Soumya Sivalingam (2009 - 2015), "Study of Physicochemical Properties of Organic Molecules in Gel and Aggregated States Using Morphological and Photophysical Characterisation Techniques".
  6. Satyajit Patra (2009 - 2015), "Photophysical Behavior of the Quantum Dots and Diffusion Behavior of Dye Molecules in Complex Environments: A Fluorescence Correlation Spectroscopic Study".
  7. Sanghamitra Banerjee (2008 - 2014), "Investigation of Excited State Kinetics, Solute-Solvent Interactions and Triplet State Properties of Some organic Molecules".
  8. Dinesh Chandra Khara (2008 - 2013), "Understanding the Physicochemical Properties of Some Imidazolinium and Morpholinium Ionic Liquids by Studying Photophysical Processes in These Media".
  9. Kotni Santhosh (2008 - 2013), "Studies on Photoinduced Processes in Room Temperature Ionic Liquids and Fluorescence Behavior of Quantum Dots and Their Hybrids With the Ionic Liquids".
  10. K. Ravi Kumar (2006 - 2011), "Synthesis and Photophysical Properties of Organic Dipolar Molecular nano/micro-particles".
  11. Bhaswati Bhattacharya (2004 - 2009), "Photoinduced Processes Studied in Conventional Solvents, Room Temperature Ionic Liquids and Proteins".
  12. Aniruddha Paul (2003 - 2008), "Exploration of Room Temperature Ionic Liquids as Media for Studying Photophysical Processes".
  13. Moloy Sarkar (2002 - 2007), "Synthesis and Study of Photophysical and Signaling Behavior of Some Electron Donor-Acceptor Systems".
  14. Prasun Kumar Mandal (2001 - 2006), "Towards Understanding the Spectral and Temporal Fluorescence Behavior of Some Organic Solutes in Conventional Solvents and Room Temperature Ionic Liquids.
  15. Tamal Ghosh (2000 - 2006), "Studies on Optical Sensing of Charged Analytes and DNA Interaction/Photocleavage Activities".
  16. Sandip Banthia (2000 - 2005), "Studies Towards the Design and Development of Photoactive Supermolecules for Signaling Transition Metal Ions".
  17. Rana Karmakar (1998 - 2003), "Static and Dynamical Fluorescence Response of Some Molecules in Room Temperature Ionic Liquids and in Media Containing Phase Transfer Catalysts".
  18. N.B. Sankaran (1997 - 2003), "Fluorescence Signaling Behavior of Some Fluorophore-Spacer-Receptor Systems Towards the Transition Metal Ions".
  19. Satyen Saha (1997 - 2002), "Influence of the Amino Functionality and Polarity of the Medium on the Photophysical behavior of Some Electron Donor-Acceptor Molecules".
  20. B. Ramachandram (1995 - 1999), "Fluorescence Response of Some Structurally Simple Multi-Component Systems Towards the Transition Metal Ions".
  21. G. Saroja (1992 - 1998), "Studies on Some Fluorescent Systems with Intramolecular Charge Transfer Emitting States".
  22. T. Soujanya (1991 -1996), "Photophysical and Theoretical Studies on Some Fluorophores with Intramolecular Charge Transfer Excited States".



M. Phil Thesis Supervision

  1. B. Devender, "Synthesis and Photophysical Studies of Some 4-Chlorophthalimide Derivatives", 2001.
  2. B. Ramachandram, "Synthesis and Photophysical Study of 4-N,N-Dimethylamine (N-11-Undecanoic acid)Phthalimide in Homogeneous and Microheterogeneous Media", 1995.
  3. Nita Das, "Study of the Fluorescent States in some N-Arylcarbazole Derivatives", 1993.
  4. P.L. Anuradha, "Studies of Some Xanthenol and Thioxanthenol Derivatives in the Ground and Excited States", 1992.
  5. T.S.R. Krishna, "Photophysical Studies of 4-aminophthalimide in Microheterogeneous Media", 1991.



Membership of Professional Bodies




Academic Outreach (Invited Lectures/Session Chair)




Organisation of Conference/Workshop/Refresher Course/School

  1. Convener, Lecture Workshop ' Recent Trends in Chemical Sciences: Trends and Challenges ' (sponsored by the National Science Academies of India), Surendranath College, Kolkata, November 29-30, 2017
  2. Member, International Advisory Committee, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, January 3-7, 2018
  3. Member, National Advisory Committee, National Symposium on ' Convergence of Chemistry and Materials', BITS Pilani, Hyderabad Campus, December 20-21, 2017
  4. Member, National Advisory Committee, 12th National Symposium on Radiation and Photochemistry (NSRP-2017), Manipal University, March 2-4, 2017.
  5. Member, National Advisory Committee, Symposium on 'Recent Advancement in Functional Materials and Nanotechnology (RAFMN-2017)', National Institute of Technology, Patna, February 15-17, 2017.
  6. Member, National Advisory Committee, Fourth DAE-BRNS Theme Meeting on Ultrafast Science 2016, Bhabha Atomic research Centre, November 24-26, 2016
  7. Member, National Advisory Committee, National Symposium on Chemistry and the Environment and National Convention of Chemistry Teachers, Raja N.L. Khan Women's College, Midnapore, October 21-23, 2016.
  8. Convener, Lecture Workshop 'Chemistry and Biology Interface' (sponsored by the National Science Academies of India), Vidyasagar University, Midnapore, April 21-22, 2016.
  9. International Advisory Board Member, Asia Pacific Symposium on Radiation Chemistry and Trombay Symposium on Radiation and Photochemistry 2016
  10. Member, National Advisory Committee, 17th National Conference on Surfactants, Emulsions and Biocolloids, Pandit Ravishankar Shukla University, Raipur, November 4-6, 2015.
  11. Member, National Advisory Board, 6th India-Japan Science Seminar, Banaras Hindu University, August 6-8, 2015.
  12. Member, National Advisory Committee, National Symposium on Radiation and Photochemistry, IIT Kanpur, March 9-11, 2015.
  13. Vice President, Asian Photochemistry Conference 2014, Kovalam, November 10-13, 2014.
  14. Member: National Advisory Board, Theme Meeting on Ultrafast Science, Manipal University, Manipal, October 31 - November 1, 2014
  15. Convener, Lecture Workshop 'Spectroscopy in Chemical Biology' (sponsored by the National Science Academies of India), Banaras Hindu University, Varanasi, Mar. 21-22, 2014.
  16. Convener, Lecture Workshop 'Modern Trend in Chemistry and its Biological Applications' (sponsored by the National Science Academies of India), Sikkim Government College, Gangtok, Feb 27-28, 2014.
  17. Convener, Lecture Workshop 'Recent Advances in Chemistry'(sponsored by the National Science Academies of India), Vivekananda Mahavidyalaya, Burdwan, Feb 17-18, 2014.
  18. Member: National Advisory Committee, Trombay Symposium on Radiation & Photochemistry-2014, Mumbai, Jan. 6-9, 2014.
  19. Member: National Advisory Committee, 5th Asian Conference on Colloid and Interface Science, November 20-23, 2013, NBU, Darjeeling.
  20. Convener, Lecture Workshop 'Recent Advances in Chemistry' (sponsored by the National Science Academies of India), AS College, Deoghar, Jharkhand. March 16-17, 2013.
  21. National Coordinator, Indo-Japan Meeting 'Recent advances in Spectroscopy and Microscopy: Fundamentals and applications to materials and biology', University of Hyderabad, November 21-22, 2012.
  22. Convener, Lecture Workshop 'Recent Trends in Chemistry' (sponsored by the National Science Academies of India), Sikkim Government College, Gangtok, March 30-31, 2012.
  23. Convener, Lecture Workshop 'Molecular spectroscopy: theory, instrumentation and applications' (sponsored by the Natioanal Science Academies of India), Banaras Hindu University, Varanasi, March 2-3, 2012.
  24. Convener, Lecture Workshop 'Recent Trends in Chemistry' (sponsored by the National Science Academies of India), North Bengal University, Darjeeling, November 11-12, 2011.
  25. Member: National Advisory Committee, Trombay Symposium on Radiation & Photochemistry 2012, Mumbai, Jan. 4-7, 2012.
  26. Chairman, 'International Year of Chemistry' Celebration Symposium titled 'Recent Trends in Spectroscopy and Dynamics of Chemical Systems', University of Hyderabad, December 7-8, 2011.
  27. Convener, Lecture Workshop 'Exploring Recent Horizons in Chemical Sciences' (sponsored by the National Science Academies of India), Dr. Babasaheb Ambedkar Marathawada University, Sub-campus Osmanabad, January 21-22, 2011.
  28. Member: National Advisory Committee, 3rd Asia Pacific Symposium on Radiation Chemistry and Trombay Symposium on Radiation & Photochemistry 2010, Lonavala, Sept. 14-17, 2010.
  29. Director, Refresher Course in Experimental Chemistry (sponsored by Indian Academy of Sciences, Indian National Science Academy and National Academy of Sciences), School of Chemistry, University of Hyderabad, June 15 - 29, 2009.
  30. Member, National Advisory Committee, National Symposium on Radiation and Photochemistry, Nainital, March 12-14, 2009.
  31. Member: National Advisory Committee, Trombay Symposium on Radiation & Photochemistry 2008, Pune, Jan. 7-11, 2008.
  32. National Advisory Committee Member, Nanotechnology and its Current Trends, Nirma University, Ahmedabad, July 26, 2007.
  33. Member: Scientific Committee, PhotoRadChem-2007 (An International Conference on Frontiers of Radiation and Photochemistry), M.G. University, Kottayam, February 8-11, 2007
  34. Member: National Organizing Committee, First Asian Spectroscopy Conference & Asian Biospectroscopy Conference, Indian Institute of Science, bangalore, Jan 29 - Feb. 3, 2007.
  35. Member: National Advisory Committee, National Symposium on Radiation and Photochemistry, National Centre for Ultrafast Processes, University of Madras, Chennai, January 2007.
  36. Director, First Refresher Course in Experimental Chemistry (sponsored by Indian Academy of Sciences), School of Chemistry, University of Hyderabad, November 27 - December 10, 2006.
  37. Member: Advisory Committee, 3rd Trivandrum International Symposium on Recent Trends in Photochemical Sciences, Regional Research Laboratory, Trivandrum, January 5-7, 2004.
  38. Coordinator, Refresher Course in Chemistry, School of Chemistry, University of Hyderabad, March 2001.
  39. Coordinator, Refresher Course in Chemistry, School of Chemistry, University of Hyderabad, March 1998.



Projects



National
Sr.No Title Source Period Amount
1 Studies of transients in photo-chemical electron transfer reactions DST 7.5.91 - 6.9.03 2,00,300
2 Theoretical and experimental investigation on model compounds with twisted
intramolecular charge transfer states		 CSIR 1.5.93 - 30.4.96 1,51,668
3 Studies on excited state dynamics by time-resolved measurement of fluorescence DST 20.10.93 - 19.10.98 44,58,460
4 Fluorescent Electron Donor - Acceptor Systems: Synthesis and study of Sensory
Behaviour Towards Transition Metal Ions		 CSIR 1.10.97 - 30.9.00 7,65, 440
5 Photophysical studies in room temperature ionic liquids CSIR 1.10.02 - 23.9.05 6,00,000
6 Fluorophore-spacer-receptor systems: photoinduced electron transfer and
fluorescence signalling of metal ions		 DST 24.9.01 - 23.9.04 27,45,840
7 Photoinduced electron and proton transfer reactions in environmentally benign media DST 1.10.04 - 30.9.07 61,86,300
8 Study of photoinduced processes in ionic liquids (under Ramanna Fellowship) DST 1.8.07 - 31.7.10 34,80,000
9 J.C. Bose Fellowship Award DST 1.8.10 - 31.7.15 68,00,000
10 J.C. Bose Fellowship (Phase II) DST 1.8.15 - 31.7.20 68,00,000
11 Fluorescence and ultrafast pump-probe studies of interfacial charge transfer
dynamics from semiconductor nanocrystals		 DST 10.8.15 - 9.8.18 70,00,000
12 Mid Career Award UGC 08.3.17 - 07.3.19 10,00,000
Bilateral
1 Elucidation of the nonradiative deactivation pathways in
4-amino-7-nitrobenz-2-oxa-1, 3-diazole and 4-aminophthalimide
derivatives (with Dr. K.A. Zachariasse)		 DST-DAAD 23.3.99 - 22.9.01 5,00,000
2 Excited state structure and relaxation pathway in EDA molecules by time-resolved
infrared/Raman spectroscopic measurements(with Prof. Hiro-o Hamaguchi,
University of Tokyo)		 DST-JSPS 23.4.00 - 22.4.02 3,25,000
3 Femtosecond near-infrared spectroscopic studies on charge carrier dynamics,
exciplex dynamics and organic pigments (with Prof. Hiro-o Hamaguchi and
Koichi Iwata of University of Tokyo and Prof S. Umapathy of Indian Institute of Science) 		DST-JSPS 20.4.04 - 19.4.06 5,25,000
4 Time-resolved total internal reflection fluorescence study of solvation dynamics at
the interfaces(with Prof. N. Teramae of Tohoku University, Sendai) 		DST-JSPS 26.4.07 - 25.4. 09 4,58,000
5 Gas phase spectroscopic study of the ionic liquids(with Prof. Akio Kawai of Tokyo Institute of Technology) DST-JSPS 1.8.11 - 31.7.13 4,64,000
6 Indo-Japan Workshop on 'Recent Advances in Spectroscopy and Microscopy: Fundamentals
and Applications to Materials and Biology', University of Hyderabad		 DST-JSPS 20-21.11.2012 4,02,000
7 Indo-Japan Workshop on 'Frontiers in Molecular Spectroscopy: Fundamentals and Applications to Materials and Biology', Nara, Japan DST-JSPS 25-28.11. 2014 8,20,000
8 Near IR spectroscopy of singlet oxygen as a probe for dynamic heterogeneity of ionic liquids DST-JSPS 1.8.11 - 31.7.13 4,54,000



Conference papers

  1. (with Navendu Mondal), Complete ultrafast charge carrier dynamics in photo-excited all-inorganic perovskite nanocrystals (CsPbX3), UFS-2016, BARC, Mumbai, November 24-26, 2016.
  2. (with Navendu Mondal), Spectral and temporal characterization of the ultrafast transients of photo-excited all inorganic perovskite nanocrystals, 2nd International Conference on Perovskite Solar Cells and Optoelectronics, Genova, Italy, September 26-28, 2016.
  3. (with Satyajit Patra) IITK MSRP 2015
  4. (with Chandra Sekhar) Photoinduced electron transfer reactions between CdTe quantum dots and cresyl violet: An ultrafast transient absorption study, Asian Photochemistry Conference, Trivandrum, Kerala, November 10-13, 2014
  5. (with S. Ghosh) Photophysics of anti-cancer drug ellipticine in acetonitrile-water mixtures: Excited state proton transfer versus excited state protonation, Asian Photochemistry Conference, Trivandrum, Kerala, November 10-13, 2014
  6. (with A. Pabbathi), Structural stability of DNA in Morpholinium ionic liquids: Molecular docking and spectroscopic study, Asian Photochemistry Conference, Trivandrum, Kerala, November 10-13, 2014
  7. (with A. Pabbathi, S. Patra), Stability of bovine serum albumin in water-DMSO mixture: An FCS study, Symposium on Focus on Microscopy 2014, University of Sydney, Australia, April 13-16, 2014
  8. (with M. Chandra Sekhar, K. Santhosh, J. Praveen, N. Mondal), Can ionic liquid overcome the limitations of CdTe quantum dots in quantum dot sensitized solar cells? Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Mumbai, 6-9 January, 2014.
  9. (with S. Soumya), Role of hydrogen bonding interaction in a leucine-based organogel: A fluorescence study, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Mumbai, 6-9 January, 2014.
  10. (with S. Patra), A FCS and Time-resolved fluorescence study of the modulation of photophysical properties of mercaptopropionic acid capped CdTe quantum dots upon exposure to light, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Mumbai, 6-9 January, 2014.
  11. (with A. Pabbathi and Shalini Ghosh), An FCS study on the structural stability of lysozyme in the presence of morpholinium ionic liquids, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Mumbai, 6-9 January, 2014.
  12. (with Satyajit Patra), An FCS, steady state and time-resolved fluorescence study of modulation of the photophysical properties of mercaptopropionic acid acpped CdTe quantum dots upon irradiation of light, Conference on Methods and Applications of Fluorescence (MAF-13), Genoa, Italy, September 8-11, 2013
  13. (with S. Soumya, K. Ravi Kumar, K. Santhosh, P.T. Anusha, S. Venugopal Rao), On the morphology, photophysical and non-linear optical properties of Phenazinium dye aggregates, 3rd Intermational Conference on Frontiers in Nanoscience and Technology (Cochin Nano 2011), Cochin, August 14-17, 2011.
  14. (with K. Santhosh), Specific and Non-Specific Solute-Solvent Interactions of Chalcone Derivatives in Room Temperature Ionic Liquids, Chemical Research Society of India National Symposium in Chemistry, Trivandrum, February 2-5, 2012.
  15. (with K. Santhosh and S. Patra), Fluorescence Quenching of Cadmium Sulphide Quantum Dots by 4-azetidinyl-7-nitrobenz-2-oxa-1,3-diazole. Energy Transfer or Charge Transfer? National Symposium on Radiation and Photochemistry, J.N.V. University, Jodhpur, March 10-12, 2011.
  16. (with S. Banerjee), Excited state proton transfer study of ellipticine in homologeneous solvents: origin of dual emission, National Symposium on Radiation and Photochemistry, J.N.V. University, Jodhpur, March 10-12, 2011.
  17. (with K. Ravi Kumar), Controlled fabrication and optical properties of highly fluorescent 1D and semi-2D nanostructures of a dipolar organic molecular system. 2nd Pacifichem, 2010, organized by International Chemical Congress of Pacific Basin Societies, Honolulu, Hawaii, December 2010.
  18. (with K. Santhosh), Modulation of the excited state intramolecular electron transfer reaction and dual fluorescence of crystal violet lactone in room temperature ionic liquids, 3rd Asia Pacific Symposium on Radiation Chemistry and DAE-BRNS 10th Biennial Trombay Symposium on Radiation and Photochemistry, Lonavala, September 14-17, 2010.
  19. (with D. C. Khara), Photophysical behavior of benzil in imidazolium ionic liquids, 3rd Asia Pacific Symposium on Radiation Chemistry and DAE-BRNS 10th Biennial Trombay Symposium on Radiation and Photochemistry, Lonavala, September 14-17, 2010.
  20. (with K. Ravi Kumar), Synthesis and optical properties of molecular nano/microparticles of 9-(4-cyanophenyl)carbazole, 3rd Asia Pacific Symposium on Radiation Chemistry and DAE-BRNS 10th Biennial Trombay Symposium on Radiation and Photochemistry, Lonavala, September 14-17, 2010.
  21. (with D. C. Khara), Discussion meeting on Chemical Reactions in Unusual Media, National Chemical Laboratory, Pune, October 8-9, 2009.
  22. (with K. Santhosh), Fluorescence response of DMABN in room temperature ionic liquids: photoinduced change and slow recovery in the dark, Discussion meeting on Chemical Reactions in Unusual Media, National Chemical Laboratory, Pune, October 8-9, 2009.
  23. (with D. C. Khara), Excited State Dynamics of 9,9'-Bianthryl (BA) in Room Temperature Ionic Liquids: A Time-Resolved Fluorescence Study National Symposium on Radiation & Photochemistry, Nainital, March, 2009.
  24. (with K. Ravi Kumar), Optical properties of rectangular nanoparticles of 4-(hexadecylamino)-7-NitroBenz-2-oxa-1,3 Diazole, National Symposium on Radiation & Photochemistry, Nainital, March , 2009.
  25. (with K. Ravi Kumar and M. Sarkar), Photophysical Properties of ADMA Nano / Microcrystals, Trombay Symposium on Radiation & Photochemistry 2008, Pune, Jan. 7-11, 2008.
  26. (with S. Saha and P. K. Mandal), Study of Solvation Dynamics in Ionic Liquid using Streak Camera. Trombay Symposium on Radiation & Photochemistry 2008, Pune, Jan. 7-11, 2008.
  27. (with B. Bhattacharya), Anisotropy behavior of EDA probes in Bovine Serum Albumin Trombay Symposium on Radiation & Photochemistry 2008, Pune, Jan. 7-11, 2008.
  28. (with A. Paul), Influence of Hydrogen Bonding on the Solvation Dynamics in a Room Temperature Ionic Liquid: Realization of the Local Effect, 4th Annual Symposium of School of Chemistry, ChemFest 2007, School of Chemistry, University of Hyderabad, Hyderabad, Mar. 2007.
  29. (with B. Bhattacharya), Nonradiative Deactivation Route of the Fluorescent State of 4-aminophthalimide Derivatives. 4th Annual Symposium of School of Chemistry, ChemFest 2007, School of Chemistry, University of Hyderabad, Hyderabad, Mar. 2007.
  30. (with A. Paul), Photoinduced Electron Transfer Reaction in Room Temperature Ionic Liquids: A Combined Laser Flash Photolysis and Fluorescence Study. National Symposium on Radiation and Photochemistry, National Centre for Ultrafast Processes, Chennai, Jan. 2007.
  31. (with A. Paul) Photoinduced electron transfer in room temerature ionic liquids, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Trombay, Mumbai, January 5-9, 2006.
  32. (with M. Sarkar) Photophysics of some push-pull fluorine derivatives, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Trombay, Mumbai, January 5-9, 2006.
  33. (with P.K. Mandal) Photophysics in room temperature ionic liquids: Dual fluorescence as ratiometric probe for viscosity, 9th International Conference on Methods and Applications of Fluorescence, Lisbon, September 4-7, 2005.
  34. (with A. Paul), An unusual excitation wavelength dependent fluorescence of imidazolium ionic liquids, presented at 7th Chemical Research Society of India Meeting, Indian Association for the Cultivation of Science, Kolkata during February 4-6, 2005.
  35. (with P. K. Mandal), Solvation dynamics in room temeparture ionic liquids, Discussion Meeting on Advances in Spectroscopy (DMAS), Indian Institute of Science, Bangalore, February 21-24, 2005.
  36. (with P. K. Mandal), Solvent dependent photophysics of second excited singlet state and red edge effect of 4'-N,N-diethylamino derivative of 3-hydroxyflavone, National Symposium on Radiation and Photochemistry, University of Karnataka, Dharwad, January 17-19, 2005.
  37. (with P. K. Mandal), Solvation dynamics in room temperature ionic liquids, International Symposium on Spectroscopy, Structure and Dynamics, 3rd Trivandrum International Symposium on Recent Trends in Photochemical Sciences, Kovalam, January 5-7, 2004.
  38. (with P. K. Mandal), Edge excitation red shift of a dipolar probe in room temperature ionic liquid, Trombay Symposium on Radiation and Photochemistry, Bhabha Atomic Research Centre, Mumbai, Jan 8-12, 2004.
  39. (with S. Banthia), Fluorescent Buckets for the Recognition of Transition Metal Ions, 3rd Trivandrum International Symposium on Recent Trends in Photochemical Sciences, Kovalam, January 5-7, 2004.
  40. (with S. Banthia), Fluorescence response of some 4-amino-1,8-naphthalimide derivatives in the absence and in the presence of various metal ions, National Symposium on Radiation and Photochemistry, Indian Institute of Technology, Kanpur, March 3 - 5, 2003.
  41. (with R. Karmakar) Time-resolved fluorescence behavior of EDA molecules in room temperature ionic liquids, International Symposium on Spectroscopy, Structure and Dynamics, IACS, Kolkata, December 12-13, 2002.
  42. (with N.B. Sankaran) Fluorescence signaling of the transition metal ions by a tetrazacrown linked 4-aminophthalimide derivative, International Symposium on Spectroscopy, Structure and Dynamics, IACS, Kolkata, December 12-13, 2002.