تقرير
Water is a radiation protection agent for ionised pyrrole
| العنوان: | Water is a radiation protection agent for ionised pyrrole |
|---|---|
| المؤلفون: | Johny, Melby, Schouder, Constant A., Al-Refaie, Ahmed, He, Lanhai, Wiese, Joss, Stapelfeldt, Henrik, Trippel, Sebastian, Küpper, Jochen |
| سنة النشر: | 2020 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Chemical Physics |
| الوصف: | Radiation-induced damage of biological matter is an ubiquitous problem in nature. The influence of the hydration environment is widely discussed, but its exact role remains elusive. Utilising well defined solvated-molecule aggregates, we experimentally observed a hydrogen-bonded water molecule acting as a radiation protection agent for ionised pyrrole, a prototypical aromatic biomolecule. Pure samples of pyrrole and pyrrole(H$_2$O) were outer-valence ionised and the subsequent damage and relaxation processes were studied. Bare pyrrole ions fragmented through the breaking of C-C or N-C covalent bonds. However, for pyrrole(H$_2$O)$^+$, we observed a strong protection of the pyrrole ring through the dissociative release of neutral water or by transferring an electron or proton across the hydrogen bond. Overall, a single water molecule strongly reduces the fragmentation probability and thus the persistent radiation damage of singly-ionised pyrrole. Comment: 15 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2010.00453 |
| رقم الأكسشن: | edsarx.2010.00453 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |