University of Bremen - Dr. Sourabh Kumar

60 University of Bremen - Dr. Sourabh Kumar https://www.uni-bremen.de/en/neudecker-group/group-members/alumni/dr-sourabh-kumar Alumnus PhD student en University of Bremen Thu, 10 Sep 2026 13:02:23 +0200 Thu, 10 Sep 2026 13:02:23 +0200 University of Bremen content-272127 Thu, 05 Mar 2026 18:43:47 +0100 Alumni https://www.uni-bremen.de/en/neudecker-group/group-members/alumni/dr-sourabh-kumar#c272127 Sourabh successfully defended his <a class="externalLink" href="https://doi.org/10.26092/elib/2357" target="_blank" title="Opens external link in new window">thesis</a> in July 2023. Project When polymers are exposed to mechanical stress, the structural and spectroscopic properties of the materials change, which can be used for the change in color of materials under stress or for self-healing. Many effects that emerge during mechanical deformation have not yet been understood: What are the factors that lead to material failure in a certain part of the polymer, while other parts stay intact? How can the color response be optimized to achieve a significant color change well before material failure occurs? How can self-healing processes be optimized? To answer these questions, computational methods for the description of molecules under mechanical stress are developed and applied. Publications <ol> <li>L. J. Mier, G. Adam, S. Kumar, T. Stauch, "<a href="https://chemistry-europe.onlinelibrary.wiley.com/doi/10.1002/cphc.202000739" target="_blank">The Mechanism of Flex-Activation in Mechanophores Revealed By Quantum Chemistry</a>",&nbsp;ChemPhysChem&nbsp;2020, 21, 2402-2406.</li> <li>S. Kumar, T. Stauch, "<a href="https://pubs.rsc.org/en/content/articlelanding/2021/RA/D0RA09834E#!divAbstract" target="_blank" title="Öffnet externen Link in neuem Fenster">The activation efficiency of mechanophores can be modulated by adjacent polymer composition</a>",&nbsp;RSC Adv.&nbsp;2021, 11, 7391-7396.</li> <li>S. Kumar, F. Zeller, T. Stauch, "<a href="https://pubs.acs.org/doi/10.1021/acs.jpclett.1c02641" target="_blank" title="Öffnet externen Link zur Publikation in neuem Fenster">A Two-Step Baromechanical Cycle for Repeated Activation and Deactivation of Mechanophores</a>",&nbsp;J. Phys. Chem. Lett.&nbsp;2021,&nbsp;12, 9740-9474. </li> <li> S. Kumar, R. Weiß, F. Zeller, T. Neudecker, “<a class="externalLink" href="https://pubs.acs.org/doi/full/10.1021/acsomega.2c05664" target="_blank" title="Opens external link in new window">Trapping the Transition State in a [2,3]- Sigmatropic Rearrangement by Applying Pressure</a>”,&nbsp;ACS Omega&nbsp;2022, 7, 45208-45214. </li> <li> S. Kumar, B. Demir, A. Dellwisch, L. Colombi Ciacchi, T. Neudecker, “<a class="externalLink" href="https://pubs.acs.org/doi/full/10.1021/acs.macromol.3c01322" target="_blank" title="Öffnet externen Link in neuem Fenster">Multiscale Mechano- chemical Modeling of Spiropyran-Merocyanine Isomerization in Linear PMMA Polymers</a>”,&nbsp;Macromolecules&nbsp;2023, 56,&nbsp;8438-8447. </li> <li> S. Kumar, "<a class="externalLink" href="https://doi.org/10.26092/elib/2357" target="_blank" title="Opens external link in new window">In Silico investigations of mechanophore activation in polymers</a>", Dissertation, University of Bremen, 2023, DOI:&nbsp;10.26092/elib/2357 </li> <li> Y. Appiarius, S. Míguez-Lago, P. Puylaert, N. Wolf, S. Kumar, M. Molkenthin, D. Miguel, T. Neudecker, M. Juríček, A. C. Campaña, A. Staubitz, “<a class="externalLink" href="https://pubs.rsc.org/en/content/articlehtml/2023/sc/d3sc02685j" target="_blank" title="Öffnet externen Link in neuem Fenster">Boosting quantum yields and circularly polarized luminescence of penta- and hexahelicenes by doping with two BN-groups</a>”,&nbsp;Chem. Sci.&nbsp;2023, DOI: 10.1039.D3SC02685J </li> <li> S. Aydonat, D. Campagna, S. Kumar, S. Storch, T. Neudecker, R. Göstl, “<a href="https://chemrxiv.org/engage/chemrxiv/article-details/66c48451f3f4b052906ca4c9" target="_blank" title="Öffnet externen Link in neuem Fenster">Accelerated mechanochemical bond scission and stabilization against heat and light in carbamoyloxime mechanophores</a>”,&nbsp;J. Am. Chem. Soc.&nbsp;2024,&nbsp;146,&nbsp;32117-32123 </li> </ol> Content