环境在离子诱导尿嘧啶碎片化过程中的作用。

The role of the environment in the ion induced fragmentation of uracil.

作者信息

Markush Pal, Bolognesi Paola, Cartoni Antonella, Rousseau Patrick, Maclot Sylvain, Delaunay Rudy, Domaracka Alicja, Kocisek Jaroslav, Castrovilli Mattea C, Huber Bernd A, Avaldi Lorenzo

机构信息

CNR-ISM, Area della Ricerca di Roma 1, Monterotondo Scalo, Italy.

Normandie Université, CIMAP (UMR6252 CEA/CNRS/ENSICAEN/UNICAEN), Boulevard Henri Becquerel, BP5133, 14070 Caen Cedex 5, France.

出版信息

Phys Chem Chem Phys. 2016 Jun 22;18(25):16721-9. doi: 10.1039/c6cp01940d.

DOI:10.1039/c6cp01940d

PMID:27271080

Abstract

The fragmentation of uracil molecules and pure and nano-hydrated uracil clusters by (12)C(4+) ion impact is investigated. This work focuses on the fragmentation behavior of complex systems and the effect of the environment. On the one hand, it is found that the environment in the form of surrounding uracil or water molecules has a significant influence on the fragmentation dynamics, providing an overall 'protective' effect, while on the other hand we observe the opening of specific fragmentation channels. In particular, we report on the first observation of a series of hydrated fragments. This indicates a strong interaction between uracil and water molecules, holding the water clusters bound to the observed molecular fragments.

摘要

研究了(12)C(4+)离子撞击下尿嘧啶分子以及纯的和纳米水合尿嘧啶团簇的碎片化过程。这项工作聚焦于复杂系统的碎片化行为以及环境的影响。一方面，发现以周围尿嘧啶或水分子形式存在的环境对碎片化动力学有显著影响，提供了整体的“保护”作用，而另一方面，我们观察到特定碎片化通道的开启。特别地，我们报告了一系列水合碎片的首次观测结果。这表明尿嘧啶与水分子之间存在强烈相互作用，使水团簇与观测到的分子碎片结合在一起。