水合核苷阴离子的光电子能谱研究：尿嘧啶(-)(H(2)O)(n=0-2)、胞嘧啶(-)(H(2)O)(n=0-2)和胸苷(-)(H(2)O)(n=0,1)。

Photoelectron spectroscopic study of the hydrated nucleoside anions: Uridine(-)(H(2)O)(n=0-2), cytidine(-)(H(2)O)(n=0-2), and thymidine(-)(H(2)O)(n=0,1).

机构信息

Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, USA.

出版信息

J Chem Phys. 2010 Oct 14;133(14):144304. doi: 10.1063/1.3487735.

PMID:20949997

Abstract

The hydrated nucleoside anions, uridine(-)(H(2)O)(n=0-2), cytidine(-)(H(2)O)(n=0-2), and thymidine(-)(H(2)O)(n=0,1), have been prepared in beams and studied by anion photoelectron spectroscopy in order to investigate the effects of a microhydrated environment on parent nucleoside anions. Vertical detachment energies (VDEs) were measured for all eight anions, and from these, estimates were made for five sequential anion hydration energies. Excellent agreement was found between our measured VDE value for thymidine(-)(H(2)O)(1) and its calculated value in the companion article by S. Kim and H. F. Schaefer III.

摘要

水合核苷阴离子，尿嘧啶(-)(H(2)O)(n=0-2)、胞嘧啶(-)(H(2)O)(n=0-2)和胸苷(-)(H(2)O)(n=0,1)，已在束中制备，并通过阴离子光电电子能谱进行研究，以研究微水合环境对母体核苷阴离子的影响。所有八种阴离子的垂直离解能(VDE)都进行了测量，从中估算了五个连续的阴离子水合能。我们测量的胸腺嘧啶(-)(H(2)O)(1)的 VDE 值与 S. Kim 和 H. F. Schaefer III 在相关文章中计算的值之间存在极好的一致性。