
Dr. Shama Parwin
Postdoctoral Fellow
Synthesis of L/D-lactide from bio-derived L/D-lactic acid obtained from waste food sources for ring-opening polymerization.
Vellore Institute of Technology (VIT), Chennai
Home Group
The group15 doctoral and 16 master's theses have been guided to completion, and alumni now work across industry and academia.

Professor Debashis Chakraborty was awarded Dr.rer.nat. from the University of Göttingen in 2000 under the mentorship of Professor Dr. Dr. h.c.mult. Herbert W. Roesky. He pursued his initial postdoctoral career at the University of Idaho in the area of Fluorine Chemistry. After about a year he moved over as a joint postdoctoral researcher between Colorado State University and the Dow Chemical Company. He returned to India in 2003 and worked as a corporate research Group Leader in two prime pharmaceutical companies before joining as a faculty in the Department of Chemistry at Indian Institute of Technology Madras in 2005. The Organometallics and Polymer Chemistry group is headed by him. The major research focus of this group lies in the areas of organometallics for polymer synthesis, homogeneous catalysis, CO2 sequestration, wealth from waste and water activation.
Professor Debashis Chakraborty is known for his ground-breaking contributions to sustainable catalysts, catalysis, CO2 derived polymer materials, and environmental remediation. His pioneering catalytic systems to manufacture biodegradable and recyclable polyesters offer viable alternatives to petroleum-based plastics, backing national goals in waste reduction and circular materials. His ingenious work on CO2 activation and conversion provides scientifically robust pathways for carbon utilization, contributing to long term climate and sustainability strategies. Other stellar studies include dye degradation and microbial remediation which have reformed practical approaches to water purification and industrial effluent treatment. Innumerable students strewn across the apogee of industry and academia are a prolific testament to his invaluable mentorship.
Professor Debashis Chakraborty has published over 120 research publications in various reputed refereed international journals and has 16 patents awarded to his credit. He is an Associate Fellow of the Institution of Chemical Engineers UK (AFIChemE), a Fellow of the International Association of Advanced Materials Sweden (FIAAM), a Fellow of Science Frontier Research Council UK (FSFRC), a Life Fellow of Indian Chemical Society (FICS) and has been recognized for his outstanding societal contributions of his research endeavors in the 33rd Edition of Marquis Who’s Who in the world. He is a member of Asia-Pacific Association of Scientific Research Singapore and Asian Polymer Association. He has professional registration with the Science Council (UK) and is a professional member of Institute of Science & Technology (UK) (MIScT) with Chartered Scientist (CSci) status.
| Dr.rer.nat. | University of Göttingen, 2000 |
| M.Sc. Chemistry | IIT Madras, 1996 |
| B.Sc. Chemistry | University of Poona, 1993 |
| Credentials | AFIChemE · FIAAM · FSFRC · FICS · MIScT · CSci |

Postdoctoral Fellow
Synthesis of L/D-lactide from bio-derived L/D-lactic acid obtained from waste food sources for ring-opening polymerization.
Vellore Institute of Technology (VIT), Chennai

Research Scholar
Organometallics for biodegradable polymer synthesis.
Asutosh College, University of Calcutta · Pondicherry University

Research Scholar
Synthesis of chiral main-group metal complexes and study of their reactivity towards ROP and ROCOP.
Rabindranath Tagore University · Gauhati University

Research Scholar
Development of catalytic systems for ROP and ROCOP.
The Maharaja Sayajirao University of Baroda

Project JRF
Design and synthesis of TADDOL-derived ligands for metal coordination and ROP.
University of Madras · IISER Kolkata
15 Ph.D. theses guided between 2010 and 2024.
| Year | Scholar | Thesis |
|---|---|---|
| 2010 | Ravikumar R. Gowda | Cyclic ester and lactide polymerization by activated monomer mechanism: progress, challenges and opportunities |
| 2012 | Payal Malik | Synthesis, structural characterization of phosphoramidates, thiophosphoramidates, arylhydrogenphosphates and their role as catalyst towards the ring opening polymerization of cyclic esters |
| 2012 | Rima Das | Silver mediated catalytic transformations of organic molecules |
| 2013 | Tanmoy Kumar Saha | Imino phenoxide complexes of group 4 metals: synthesis, structural characterization and polymerization studies |
| 2015 | Swarup Ghosh | Main group complexes containing imino(phenoxide) scaffold: synthesis, structural characterization and polymerization studies |
| 2016 | Bijja Rajashekhar | Homoleptic complexes of group 4 metals: synthesis, structural characterization and studies on the ring opening polymerization of cyclic esters |
| 2016 | Sagnik K. Roymuhury | Ring opening polymerization of lactide using group 4 metals containing bi-, tri- and tetradentate scaffolds |
| 2016 | Mrinmay Mandal | Group 4 complexes bearing half-salen, salen, salan and salphen ligands: synthesis, characterization and polymerization studies |
| 2016 | Dipa Mandal | Group 4 complexes of [NNO], [OO] and [NO]-type donor ligands: synthesis, structural characterization and polymerization studies |
| 2017 | Sreenath Pappuru | Ring-opening homo and copolymerization studies of monomers using group 4 metal complexes containing benzotriazole and benzoxazole ligands |
| 2020 | Kriti Aakansha | Process development for decolorization and degradation of azo dyes by microorganisms |
| 2020 | Anjaneyulu Kummari | Lewis pair catalysts in polymer synthesis: new routes towards the synthesis of fully alternating polyesters and hyperbranched polyglycerols |
| 2023 | Sourav Singha Roy | Zn(II), Al(III), Mg(II) compounds supported by unsymmetrical phenoxy-imine ligands: tacticity control in the ROP of rac-lactide and ROCOP of epoxides with CO2 |
| 2023 | Siva Chander Chabattula | Biogenic synthesis of metal nanoparticles for biological applications |
| 2024 | Sriparna Sarkar | Exploring the subtleties of ring opening polymerization (ROP) and ring opening copolymerization (ROCOP) reactions using Group 4 and Group 13 metal compounds |
16 M.Sc. theses guided between 2006 and 2024.
| Year | Scholar | Thesis |
|---|---|---|
| 2006 | Dhruba Sarkar | Schiff base complexes of Fe(III): synthesis, characterization and polymerization studies |
| 2006 | M. Kumaravel | Synthesis and characterization of Schiff base complexes of molybdenum |
| 2007 | Sandip Mukherjee | Alkoxides and aryloxides of Ti(IV): synthesis, characterization and polymerization studies |
| 2008 | B. Rajashekhar | Formation of phosphonic acid anion through metal assisted hydrolysis of the P-N bond |
| 2009 | P. Sudarsanam | Cationic ring-opening polymerization of ε-caprolactone using phosphonic acid initiators |
| 2011 | Vinod Kumar Goda | Fe(III) catalyzed oxidation of sulfides |
| 2012 | Sashidhar Reddy | Lactide polymerization using a chiral iminophenolate of Zr |
| 2012 | Ajay Kumar Jana | Iminophenolate compound of Ga: synthesis, characterization and studies on bulk polymerization of lactides |
| 2013 | Abhijit Mondal | Zr(IV) complexes containing salan type ligand: synthesis, structural characterization and polymerization studies |
| 2017 | Apurba Taye | Ring-opening co-polymerization studies using binuclear Co, Ni, Cu and Zn complexes containing bis-benzoxazole phenoxide ligands |
| 2017 | Suman Das | Ring-opening co-polymerization studies using bimetallic Ni and Zn complexes containing benzoxazole phenoxide ligands |
| 2019 | Lunthinglien Chiru | Metal free catalysts for the copolymerization of epoxides with anhydrides |
| 2022 | Koushik Roy | Synthesis of PLA using Zn(II) catalysts containing unsymmetrical phenoxy-imine ligands with thiophen-2-ylmethanimine side arms |
| 2022 | Ajay Mishra | Ring-opening polymerization catalysts of Ti(IV) derived from phenoxy imine ligands containing a furan-2-ylmethanimine side arm |
| 2023 | Nishant Chaudhary | Role of Zn (II) compounds containing unsymmetrical phenoxy-imine ligands for the ring-opening polymerization (ROP) of rac-lactide |
| 2024 | Soumyadip Roy | Zinc compounds for ROP reactions |
If you have a background in inorganic, organometallic or polymer chemistry, we would like to hear from you.