Biman Bagchi
Biman Bagchi | |
|---|---|
Indian Institute of Science, Bangalore | |
| Doctoral advisor | Julian Gibbs |
| Website | Group website |
Biman Bagchi is an Indian scientist currently serving as a SERB-DST National Science Chair Professor and Honorary Professor at the Solid State and Structural Chemistry Unit of the Indian Institute of Science.[2] He is a theoretical physical chemist and biophysicist known for his research in the area of statistical mechanics; particularly in the study of phase transition and nucleation, solvation dynamics, mode-coupling theory of electrolyte transport, dynamics of biological macromolecules (proteins, DNA etc.), protein folding, enzyme kinetics, supercooled liquids and protein hydration layer.[3] He is an elected fellow of the Indian National Science Academy,[4] the Indian Academy of Sciences,[5] The World Academy of Sciences[6] and an International honorary member of the American Academy of Arts and Sciences.[1] Along with several scientific articles, he has authored three books, (i) Molecular Relaxation in Liquids[7], (ii) Water in Biological and Chemical Processes: From Structure and Dynamics to Function,[8] and (iii) Statistical Mechanics for Chemistry and Materials Science[9].
Biography
Bagchi was born in 1954 to Binay K. Bagchi, a school principal and his homemaker/part-time teacher wife, Abha, in
Research
 | This article may be too technical for most readers to understand. (March 2022) |
In an academic career spanning over more than three decades in which Bagchi has travelled over a wide landscape of physical chemistry, chemical physics, and biophysical chemistry where his contributions often helped build up an area from its foundations. This was done by maintaining a close collaboration with experimental research groups both in India and abroad. He often developed theories that combined sophisticated theoretical approaches (such as mode coupling theory) to extend traditional and established theories and methods (like Kramers’ theory of barrier crossing dynamics, FRET, and electrochemistry) to explain emerging experimental and simulation results.
Professor Bagchi has published more than 480 articles and received more than 24000 citations.
Some representative examples of his seminal contributions are discussed below:
(i) In the 1970s and 1980s, it was realized that a large number of ultrafast processes could show the usual dynamical characteristics of an activated reaction but occur in the absence of any activation barrier to their reactive motion. Prof. Bagchi developed the first and till to date the most successful theory of barrierless chemical reactions. This theory explained how we can speak of a reaction rate even in the absence of a barrier.
(ii) Solvation dynamics of polar solutes in dipolar liquids (like water, ethanol) was a topic of huge contemporary interest from mid-eighties to late nineties. A continuum model of the solvent with a frequency dependent dielectric function was developed by Bagchi that predicted a relaxation time, later called the longitudinal relaxation time, which was faster than the dielectric relaxation time of the solvent, thus providing a first-time explanation of the experimentally observed fast relaxation of the time dependent solvation energy. However, the continuum model could not explain the ultrafast sub-100 fs solvation observed by Fleming et al. Bagchi explained this by developing a microscopic theory which included intermolecular correlations and also the contribution of translational contributions of solvent molecules.
(iii) The dielectric relaxation theories prior to mid-eighties considered primarily rotational modes. Bagchi and co-workers came up with a microscopic theory of frequency and wave vector dependent dielectric function which included both rotational and translational degrees of freedom. Translational modes were shown to play a hidden role in dielectric relaxation. Due to the presence of orientational correlations, the longitudinal and transverse dielectric functions exhibit vastly different relaxation times at finite wave vectors. This was indeed an important result because, in many dynamical processes, it is the finite wave vector response of the solvent that matters the most. A self-consistent theory was developed for the dielectric friction and dielectric relaxation. It was shown that the presence of translational contributions can make dielectric relaxation more Debye-like for cases where only rotational contributions give rise to a highly non-Debye form of dielectric relaxation.
Awards and honors
The Indian National Science Academy awarded Bagchi the INSA Medal for Young Scientists in 1986;
Selected bibliography
Books
- Biman Bagchi (17 April 2012). Molecular Relaxation in Liquids. Oxford University Press, USA. ISBN 978-0-19-986332-7.
- Biman Bagchi (14 November 2013). Water in Biological and Chemical Processes: From Structure and Dynamics to Function. Cambridge University Press. ISBN 978-1-107-03729-8.
- Biman Bagchi (17 July 2018). Statistical Mechanics for Chemistry and Materials Science. CRC Press. ISBN 9781482299861.
Chapters
- Arnab Mukherji; Richard Lavery; Biman Bagchi; James T Hynes (2009). "Simulation Study of the Molecular Mechanism of Intercalation of the Anti-cancer Drug Daugnomycin into DNA". In Irene Burghardt; V. May; David A. Micha; E. R. Bittner (eds.). Energy Transfer Dynamics in Biomaterial Systems. Springer. p. 165. ISBN 978-3-642-02306-4.
- Dwaipayan Chakarabarti, Biman Bagchi (2009). "Dynamics of Thermotropic Liquid Crystals". In Stuart A. Rice (ed.). Advances in Chemical Physics. John Wiley & Sons. p. 266. ISBN 978-0-470-43190-0.
- Biman Bagchi (2012). "Dynamics in the Crossover Region of Supercooled Liquids". In Peter G. Wolynes; Vassiliy Lubchenko (eds.). Structural Glasses and Supercooled Liquids: Theory, Experiment, and Applications. John Wiley & Sons. p. 279. ISBN 978-0-470-45223-3.
- Rakesh S Singh; Mantu Santra; Biman Bagchi (2016). "Theoretical Studies of Nucleation and Growth". In Swapan Kumar Ghosh; Pratim Kumar Chattaraj (eds.). Concepts and Methods in Modern Theoretical Chemistry: Statistical Mechanics. CRC Press. p. 1. ISBN 978-1-4665-0621-3.
Notes
- ^ Please see Lectures section
References
- ^ a b "American Academy of Arts and Sciences Fellow". American Academy of Arts and Sciences. 2020.
- ^ "Amrut Mody Professor". Indian Institute of Science. 2016. Archived from the original on 17 September 2017. Retrieved 24 November 2016.
- ^ "Brief Profile of the Awardee". Shanti Swarup Bhatnagar Prize. 2016. Retrieved 12 November 2016.
- ^ a b c d "Indian fellow". Indian National Science Academy. 2016. Archived from the original on 5 March 2021. Retrieved 24 November 2016.
- ^ a b "Fellow profile". Indian Academy of Sciences. 2016. Retrieved 12 November 2016.
- ^ a b "TWAS fellow". The World Academy of Sciences. 2016.
- ^ ISBN 978-0-19-986332-7.
- ^ ISBN 978-1-107-03729-8.
- S2CID 106103681.
- PMID 26310133.
- ^ "Bagchi Group official website". Laboratory profile. Bagchi Group. 2016. Archived from the original on 23 October 2019. Retrieved 24 November 2016.
- ^ "Biman Bagchi". scholar.google.com. Retrieved 14 August 2021.
- S2CID 4322254.
- PMID 1729690.
- PMID 27436905.
- PMID 18927234.
- PMID 31969453.
- S2CID 13047773.
- ISSN 0021-9606.
- ISSN 1520-6106.
- PMID 11749282.
- PMID 16159150.
- ^ "INSA Medal for Young Scientists". Indian National Science Academy. 2016. Archived from the original on 11 May 2021. Retrieved 24 November 2016.
- ^ "A. K. Bose Memorial Medal". Indian National Science Academy. 2016. Archived from the original on 11 May 2021. Retrieved 24 November 2016.
- ^ "Chemical Sciences". Council of Scientific and Industrial Research. 2016. Archived from the original on 12 September 2012. Retrieved 7 November 2016.
- ^ "Prizes and Awards". The World Academy of Sciences. 2016.
- ^ "J. C. Bose National Fellow" (PDF). Science and Engineering Research Biard. 2016.
- PMID 26310132.
- PMID 26310132.)
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External links
- "Bagchi Group official website". Leader profile. Bagchi Group. 2016. Archived from the original on 23 October 2019. Retrieved 24 November 2016.
- "Publications from Ph. D. and Postdoctoral Studies". IISER Pune. 2016.
Further reading
- Chandra, A.; Biswas, R.; Fleming, G. R. (August 2015). Chandra, Amalendu; Biswas, Ranjit; Fleming, Graham R. (eds.). "A Tribute to Biman Bagchi". The Journal of Physical Chemistry. 119 (34): 10809–11442. PMID 26310132.
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