The Dasgupta Research Group @ TIFR

Ultrafast Biophysics and Photomaterials Group


After joining TIFR (2010-current)



A. Das, I.  Mandal, R. Venkatramani and J. Dasgupta*; “Ultrafast Photoactivation of C-H Bonds inside Water-Soluble Nanocages”, Science Advances (2019) 5, 2, eaav4806 *corresponding author

KC Krishnapriya, P. Roy, B. Puttaraju, U. Salzner, A. J. Musser, M. Jain, J. Dasgupta*, S. Patil*; “Spin density encodes intramolecular singlet exciton fission in pentacene dimers”, Nature Communications (2019) 10, 33. *joint corresponding authors

I. Bhattacharjee, Nita Ghosh, A. Raina, J. Dasgupta and Debdas Ray*; “Conformational switching via an intramolecular H-bond modulates the fluorescence lifetime in a novel coumarin–imidazole conjugate”, Physical Chemistry Chemical Physics (2018) 20, 6060-6072

P. Roy, S. Karmakar and J. Dasgupta*, “Femtosecond Stimulated Raman Spectroscopy” book chapter in Advances in Spectroscopic Applications”, Elsevier Waltham, USA and Academic Press (2018). *corresponding author

Palas Roy, A. Jha, V. B. Yasarapudi, T. Ram, B. Puttaraju, S. Patil and J. Dasgupta*, “Ultrafast bridge planarization in donor-π-acceptor copolymers drives intramolecular charge transfer” Nature Communications (2017), 8, 1716 . *corresponding author

Highlighted in Nature Publishing under the subject “Excited States”:

T. Mukhopadhyay, B. Puttaraju, P. Roy, J. Dasgupta, A Meyer, S Patil*, “Facile Synthesis and Chainlength Dependent Optical and Structural Properties of Diketopyrrolopyrrole‐based Oligomers” Chemistry-A European Journal (2017) 23, 13718-13723

J. Dasgupta*, A. Datta*, R. Venkatramani*, "Highlights from Kaleidoscope: A discussion meeting in Chemistry, Goa, India, July 2016", Chemical Communications (2017), 53, 8926-8930. *co-corresponding authors

M Johny, K Vijayalakshmi, A Das, P Roy, A Mishra and J. Dasgupta*,"Modulating the Phe-Phe dipeptide aggregation landscape via covalent attachment of an azobenzene photoswitch", Chemical Communications (2017) 53, 9348-9351. *corresponding author

P. Roy, A. Jha, and J. Dasgupta*, Photoinduced Charge Generation Rates in Soluble P3HT:PCBM Nano-aggregates Predict the Solvent-Dependent Film Morphology ”; Nanoscale (2016), 8, 2768-2777.

Y. Yang, K. Heyne,* R. Mathies,* and J. Dasgupta*, Non-bonded interactions drive the sub-picosecond bilin photoisomerization in the Pfr state of phytochrome Cph1”; ChemPhysChem (2016), 17, 369–374. 10.1002/cphc.201501073/pdf. pdf 

A. Das, A. Jha, R. Gera and J. Dasgupta*, Photoinduced Charge Transfer State Probes the Dynamic Water Interaction around Metal-Organic Nanocages”; J. Phys. Chem. C (2015), 119, 21234–21242. pdf

K. Vijayalakshmi, A. Jha and J. Dasgupta*, Ultrafast Triplet Generation and its Sensitization Drives Efficient Photoisomerization of tetra-cis-lycopene to all-trans-lycopene”; J. Phys. Chem. B (2015), 119, 8669–8678. pdf

TOP 20 most accessed papers in JPCB for the month of June 2015.

A. Jha, V. Benyamin, H. Jasbeer, C. Kanimozhi, S. Patil and J. Dasgupta*, Heterogeneity in Dye-TiO2 Interactions Dictate Charge Transfer Efficiencies for Diketopyrrolopyrrole-Based Polymer Sensitized Solar Cells”; J. Phys. Chem. C (2014), 118, 29650−29662. pdf

TOP 10 most accessed papers in JPCC for the month of November-December 2014. 

R. Gera, A. Das, A. Jha and J. Dasgupta*, “Light-Induced Proton-Coupled Electron Transfer Inside a Nanocage” J. Am. Chem. Soc. (2014), 136, 15909–15912. link to pdf

Featured as a story in Nature Asia: “Light triggers fast catalysis inside a nanocage”

A. Jha, D. Chakraborty, V. Srinivasan,* J. Dasgupta*, "Photoinduced Charge Transfer in Solvated Anthraquinones is Facilitated by Low-frequency Ring Deformations"; J. Phys. Chem. B (2013) 117, 12276–12285. pdf

TOP 20 most accessed papers in JPCB for the month of September-October 2013. 

A. Khorobrykh, J. Dasgupta, D.R. J. Kolling, V. Terentyev, V.V. Klimov and G.C. Dismukes; "Evolutionary origins of the photosynthetic water oxidation cluster: Bicarbonate permits Mn2+ photo-oxidation by anoxygenic bacterial reaction centers"; ChemBioChem (2013) 14,1725-1731

A. Jha, And J. Dasgupta*, “Femtosecond stimulated Raman spectroscopy: Potential tool to monitor chemical reaction dynamics” ISRAPS Bulletin (2013) June Issue.

J. Dasgupta*, R. Frontiera, C. Fang and R. Mathies, "Femtosecond Stimulated Raman Spectroscopy", in Encyclopaedia of Biophysics Ed. by Prof. Andreas Barth, Book Chapter December 2012. * indicates corresponding author

R. Frontiera, C. Fang, J. Dasgupta and R.A. Mathies, "Probing structural evolution along multidimensional reaction coordinates with femtosecond stimulated Raman"; Phys. Chem. Chem. Phys. (2012) 14, 405-14

K. Spillane, J. Dasgupta  and  R.A. Mathies, "Conformational homogeneity and excited state isomerization dynamics of the bilin chromophore in Cph1 from Resonance Raman intensities", Biophysical J. (2012) 102, 709-17 

J. Dasgupta, A.M. Tyryshkin, S.V. Baranov and G.C. Dismukes, "Bicarbonate participates in the assembly of the tetra-Mn Cluster in Photosystem II: pH dependence of Mn3+ EPR signal", Appl. Magn. Reson. (2010) 37, 137–150


Before TIFR (2001-2009)

R. Frontiera, J. Dasgupta and R.A. Mathies, "Probing interfacial electron transfer in coumarin 343 sensitized TiO2 nanoparticles with femtosecond stimulated Raman"; J. Am. Chem. Soc. (2009) 131, 15630-2

K. Spillane, J. Dasgupta, J. C. Lagarias and R. A. Mathies, "Homogeneity of Phytochrome Cph1 Vibronic Absorption Revealed by Resonance Raman Intensity Analysis"; J. Am. Chem. Soc. (2009) 131, 13946–13948

S. Shim, J. Dasgupta and R.A. Mathies, "Femtosecond Time-Resolved Stimulated Raman Reveals the Birth of the J and K Intermediates in Bacteriorhodopsin’s Photocycle"; J. Am. Chem. Soc. (2009) 131, 7592–7597

J. Dasgupta, R. Frontiera, K. Taylor, J.C. Lagarias, R.A. Mathies, "Ultrafast Excited State Isomerization in Phytochrome Revealed by Femtosecond Stimulated Raman Spectroscopy"; Proc. Natl. Acad. Sci USA (2009) 106, 1784-1789.

J. Dasgupta, G.M. Ananyev and G.C. Dismukes, "Photoassembly of the Water-Oxidizing Complex in Photosystem II"; Coord. Chem. Rev. (2008) 252(3-4), 347-360.

J. Dasgupta, A.M. Tyryshkin and G.C. Dismukes, "ESEEM Spectroscopy Reveals Carbonate and N-donor Protein Ligand Binding to Mn2+ in the Photoassembly Reaction of the Mn4Ca cluster in Photosystem II"; Angew. Chem. Int. Ed. (2007), 46, 8028-8031.

A.M. Tyryshkin, R. Watt, S.V. Baranov, J. Dasgupta, M. Hendrich and G.C. Dismukes, "Ca2+ Directs the Assembly of the Mn4Ca Cluster in the Photosynthetic Water Oxidizing Complex: Formation of a Ligand Bridge to Mn3+ via Deprotonation"; Biochemistry (2006), 45, 12876-12889.

J. Dasgupta, A.M. Tyryshkin, Yu.N. Kozlov, V.V. Klimov and G.C. Dismukes, "Carbonate complexation with Mn2+ in Aqueous Phase: Redox Behavior and Ligand Binding Modes by Electrochemistry and EPR"; J. Phys. Chem. B (2006), 110, 5099-5111.

Yu. N. Kozlov, S.K. Zharmukhamedov, K.G. Tikhonov, J. Dasgupta, A.A. Kazakova, G.C. Dismukes and V.V. Klimov, "Oxidation potentials and functional interaction with photosystem II of manganese complexes with bicarbonate, formate and acetate"; Phys. Chem. Chem. Phys. (2004), 6, 4905 – 4911.

J. Dasgupta, R.van Willigen and G.C. Dismukes, "Consequences of structural and biophysical studies for the molecular mechanism of photosynthetic oxygen evolution: Roles for calcium and bicarbonate"; Phys. Chem. Chem. Phys. (2004), 6, 4793 – 4802.

G.C. Dismukes, V.V. Klimov, S.V. Baranov, Yu. N. Kozlov, J. Dasgupta, and A.M. Tyryshkin, "The Origin of Atmospheric Oxygen on Earth: The Innovation of Oxygenic Photosynthesis"; Proc. Natl. Acad. Sci. USA (2001), 98, 2170–2175.

A. Basak, K. R. Rudra, H. M. Bdour and J. Dasgupta, "Active Site Geometry of Porcine Pancreatic Lipase: An interesting switchover from Jones’ to Seebach’s Mode"; Bioorg. & Med. Chem. Lett. (2001), 11, 305-307.