Preprint

PUBDB-2020-04386

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Water is a radiation protection agent for ionised pyrrole

Johny, M. (First author)CFEL*DESY* ; Schouder, C. A. ; Al-Refaie, A.Extern*DESY* ; He, L.CFEL*DESY* ; Wiese, J.CFEL*DESY* ; Stapelfeldt, H. ; Trippel, S. (Corresponding author)CFEL*DESY* ; Küpper, J.CFEL*DESY*

2020

This record in other databases:  

Please use a persistent id in citations: doi:10.3204/PUBDB-2020-04386

Report No.: arXiv:2010.00453

Abstract: 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. We present the experimental observation of a hydrogen-bonded water molecule acting as a radiation protection agent for ionized pyrrole, a prototypical aromatic biomolecule. Pure samples of pyrrole and pyrrole(H$_2$O) were outer-valence ionized and the subsequent damage and relaxation processes were studied. Bare pyrrole fragmented through the breaking of the 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. Furthermore, for pyrrole(H$_2$O) a smaller probability for double ionization was observed. Overall, a single water molecule strongly reduces the fragmentation probability and thus the persistent radiation damage of ionized pyrrole.

---

Contributing Institute(s):

1. CFEL-CMI (FS-CFEL-CMI)
2. CFEL-Coherent X-Ray Imaging (FS-CFEL-1)
3. beauftragt von UNI (UNI/CUI)
4. Uni Hamburg / Experimentalphysik (UNI/EXP)

Research Program(s):

1. 6211 - Extreme States of Matter: From Cold Ions to Hot Plasmas (POF3-621) (POF3-621)
2. MEDEA - Molecular Electron Dynamics investigated by IntensE Fields and Attosecond Pulses (641789) (641789)
3. COMOTION - Controlling the Motion of Complex Molecules and Particles (614507) (614507)
4. DFG project 390715994 - EXC 2056: CUI: Advanced Imaging of Matter (390715994) (390715994)
5. Ex-Net-0002-Phase2-3 - Advanced Imaging of Matter: Structure, Dynamics and Control on the Atomic Scale - AIM (2018_Ex-Net-0002-Phase2-3) (2018_Ex-Net-0002-Phase2-3)
6. DFG project 194651731 - EXC 1074: Hamburger Zentrum für ultraschnelle Beobachtung (CUI): Struktur, Dynamik und Kontrolle von Materie auf atomarer Skala (194651731) (194651731)

Experiment(s):

1. Experiments at CFEL

Appears in the scientific report 2020

---

Database coverage:
; Published

---

---

Linked articles:

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Journal Article Johny, M.CFEL*Extern*XFEL.EU* ; Schouder, C. A.CFEL*Extern* ; Al-Refaie, A.Extern* ; He, L.CFEL*Extern*XFEL.EU* ; Wiese, J.CFEL*Extern*XFEL.EU* ; Stapelfeldt, H.Extern*XFEL.EU* ; Trippel, S. (Corresponding author)CFEL*XFEL.EU*DESY* ; Küpper, J.CFEL*XFEL.EU*DESY*
Water is a radiation protection agent for ionised pyrrole
Physical chemistry, chemical physics 26(17), 13118-13130 (2024) [10.1039/D3CP03471B]2024     Files  Fulltext by arXiv.org BibTeX | EndNote: XML, Text | RIS

---