Ranjan Das, Ph.D. (IACS, Jadavpur)

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Department of Chemistry
West Bengal State University,
Berunanpukuria, Malikapur,
Barasat, 24 Pgs (N), Kolkata- 700 126
West Bengal, INDIA
Phone – +91-33-25241975
Mob.No – 98361 54202
Fax: +91-33-25241977
E-mail: bkgcranjandas@rediffmail.com, ranjan.das@wbsub.ac.in

Research Areas: Time-resolved Fluorescence spectroscopy

Research Interest:

Excited state proton and electron transfer reactions, Solvation dynamics, Photophysics of fluorescent dyes in microheterogeneous media, Photophysics of Dye-doped nanomaterials and core-shell nanoparticles

Member of Professional Bodies:

1. Life member, Indian Association for the Cultivation of Science, Jadavpur
2. Member, American Chemical Society

1. Ph.D.(Science) : Indian Association for the Cultivation of Science, 1997
2. M.Sc. in Chemistry : University of Calcutta, 1991

1. Invited Professor, University de Strasbourg, France, 2010
2. Associate Scientist (CNRS), Institut Gilbert Laustriat, Strasbourg, 2007-2008
3. Post-Doctoral Research Associate, Iowa State University, Ames,USA 2003-2005
4. Research Associate (CSIR), IACS, 1996-97
5. Reviewer of International journals (Chemical Physics, Photochemical and Photobiological Sciences, Journal of Physical Chemistry A)

Publications:

1. Intramolecular proton transfer in the first excited electronic states of 4-methyl-2,6-diformylphenol in some hydrocarbon solvents, S.Mitra, R.Das and S.Mukherjee Chem.Phys.Letts.,202(1993)549
2. Proton transfer in the ground and excited electronic state of 4-methyl-2,6-diformylphenol:Role of alcoholic solvents, R.Das, S.Mitra and S.Mukherjee, Bull.Chem.Soc.Jpn.,66(1993)2492
3. Proton transfer and anion formation in the ground and excited states of 4-methyl-2,6-diformylphenol in highly polar aprotic solvents, R.Das, S.Mitra and S.Mukherjee, J.Photochem.Photobiol.A:Chem.,76(1993)33
4. Ground and excited state proton transfer of 4-methyl-2,6-diformylphenol in different solvent mixtures, R.Das, S.Mitra and S.Mukherjee,Chem.Phys.Letts.,221(1994)368
5. Intramolecular proton transfer in the first excited singlet state of 4-methyl-2,6- diformylphenol: effect of nonpolar and weakly polar aprotic solvents, R.Das, S.Mitra and S.Mukherjee, Spectrochim.Acta.,51A(1994)363
6. Proton transfer and excitaion wavelength dependentfluorescence and phosphorescencespectra of 4-methyl-2,6-diformylphenol: interaction with triethylamine, S.Mitra, R.Das and S.Mukherjee, J.Photochem.Photobiol.A:Chem.,79(1994)49
7. Emission spectra of 4-methyl-2,6-diacetylphenol in 3-methylpentane at room temperature and 77K, S.Mitra, R.Das and S.Mukherjee,Chem.Phys.Letts.,228(1994)363
8. Excitation wavelength and solvent dependent emission spectra in weakly polar aproticsolvents in room temperature and 77K, S.Mitra, R.Das and S.Mukherjee, Spectrochim.Acta.,50A(1994)1301
9. Ground and excited state proton transfer of 4-methyl-2,6-diacetylphenol in some highly polar aprotic solvents: interaction with base, R.Das, S.Mitra, D.N.nath and S.Mukherjee, Ind.J.Chem.,34A(1995)850
10. Effect of alkyl group of some alcohols on the proton transfer reaction of 4-methyl-2,6-diformylphenol and interaction with triethylamine, R.Das, S.Mitra and S.Mukherjee, Acta.Chemica.Scandinavica.,49(1995)469
11. Complex formation and photophysical properties of luminol : solvent effects, S.Mitra, R.Das and S.Mukherjee, J.Photochem.Photobiol.A:Chem.,87(1995)225
12. Absorption and emission spectra of 4-methyl-2,6-diformylphenol in protic solvents:interaction with amine bases, R.Ray, S.Mitra, R.Das and S.Mukherjee,Proc.Ind.Acad.Sci(Chem.Sci.).,108(1996)79
13. Dynamics processes of the excited state proton transfer of 4-methyl-2,6-diacetylphenol in protic solvents at room temperature and 77K : interaction with base, R.Das, S.Mitra and S.Mukherjee, J.Chim.Phys.,93(1996)458
14. Dynamical solvent effect on the intramolecular proton transfer reaction of 4-methyl-2,6-diformylphenol in mixed solvents, S.Mitra, R.Das and S.Mukherjee, J.Mol.Liquids.,68(1996)65
15. Ground and excited state proton transfer of o-hydroxybenzaldehyde and 4-methyl-2,6-diformylphenol in aqueous medium, S.Mitra, R.Das and S.Mukherjee, Spectrochim.Acta.,52A(1996)373
16. Spectroscopic studies and fluorescence quenching of luminol in aqueous medium,U.Bhattacharjee, S.Mitra, R.Das and S.Mukherjee, Ind.J.Chem.,35A(1996)633
17. Excited state proton transfer as a probe for the microenvironment of a binding site of Bovine Serum Albumin : Effect of Urea, R.Das, S.Mitra, D.N.Nath and S.Mukherjee, J.Phys.Chem.,100(1996)14514
18. Energetic and kinetic aspects of intramolecular proton transfer in 4-methyl-2,6-diformylphenol: A detailed analysis with AM1 potential energy surfaces, S.Mitra, R.Das, S.P.Bhattacharyya and S.Mukherjee, J.Phys.Chem.A.,101(1997)293
19. Fluorescence studies on Luminol in water-organic solvent mixtures, D.Guha, R.Das, S.Mitra and S.Mukherjee, Ind.J.Chem.,36A(1997)307
20. Intramolecular charge transferas probing reaction : Fluorescence monitoring of Protein-Surfactant interaction, R.Das, S.Mitra, S.Kar, S.Lahiri and S.Mukherjee, J.Phys.Chem.A.,101(1997)4042
21. Interaction of 3-aminophthalhydrazide with 5-hydroxytetracycline and chloramphenicol : a fluorescence quenching study, D.Guha, S.Mitra, R.Das, U.Bhattcharjee and S.Mukherjee, Spectrochim.Acta.,54A(1998)525
22. Intramolecular proton transfer in Inclusion complexes of Cyclodextrins : role of water and highly polar nonaqueous media, S.Mitra, R.Das and S.Mukherjee, J.Phys.Chem.B.,102(1998)3730
23. Study of proton transfer reactions in binary solvent mixtures by steady state and nanosecond spectroscopy, S. Mitra, R. Das, D. Guha, S. Mukherjee, Spectrochim.Acta.,54A(1998)1073
24. Photoinduced proton transfer in 3-methyl-6-hydroxy-m-phthalic acid, R.Das, S.Mitra, D.Guha and S.Mukherjee, J.Luminescence.,81(1999)61
25. Ground and excited state proton transfer in some orthohydroxy aromatic compounds and solvent effect, D.Guha, A.Mandal, R.Das, S.Mitra and S.Mukherjee, Israel.J.Chem.,39(1999)375
26. Proton transfer reaction of 4-methyl-2,6-diacetylphenol and an analysis with AM1 potential energy surfaces, A.Mandal, D.Guha, R.Das, S.Mitra and S.Mukherjee, J.Chem.Phys.,114(2001)1336
27. Proton transfer reaction of 4-methyl-2,6-dicarbomethoxyphenol in nonpolar and weakly polar solvents, A.Mandal, S.Mitra, R.Das, D.N.Nath and S.Mukherjee, J.Chem.Phys.,117(2002)5280
28. Excited state intermolecular proton transfer and caging of salicylidine-3,4,7-methylamine in cyclodextrins, M.Mukhopadhyay, D.Banerjee, A.Koll, A.Mandal, A.Filarowski, D.Fitzmaurice, R.Das and S.Mukherjee J.Photochem.Photobiol.A:Chem., 175(2005)94
29. Interaction of Glutathione S-Transferase with Hypericin : A Photophysical Study,M.Halder, P.K.Chowdhury, R.Das, P.Mukherjee, W.M.Atkins and J.W.Petrich, J.Phys.Chem.B., 109(2005)19484
30. Fluorescence Quenching in Surfactant Solutions : A Laboratory Experiment fordetermination of Micelle Aggregation Number, R. Das* published on February 8, 2006 in the Proceedings on New Perspectives in Physical Chemistry Curriculum organized by the Department of Chemistry, University of Calcutta
31. Excited state proton transfer and solvent relaxation of a 3-hydroxyflavone probe in lipid bilayers, R.Das*, A.Klymchenko, G.Duportail and Y.Mely, J.Phys.Chem.B., 112(2008)11929
32. Unusually slow proton transfer dynamics of a 3-hydroxychromone dye in protic solvents, R.Das*, A.Klymchenko, G.Duportail and Y.Mely, Photochem.Photobiol.Sci., 8(2009)1583