Interstellar ice surface site modification induced by dicyanoacetylene adsorption

被引：13

作者：

Guennoun, Z ^{[1
]}

Couturier-Tamburelli, I ^{[1
]}

Piétri, N ^{[1
]}

Aycard, JP ^{[1
]}

机构：

[1] Univ Aix Marseille 1, CNRS, UMR 6633, Equipe Spectrometries & Dynam Mol,Ctr St Jerome, F-13397 Marseille 20, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 08期

关键词：

D O I：

10.1021/jp044978k

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Dicyanoacetylene adsorbed on amorphous ice water at 10 K presents an interaction with the dangling H site and induces a S-4 adsorption site formation due to the restructuring of the ice bulk. Warming up the sample provokes the dicyanoacetylene desorption from the H2O ice film, which could be due to the beginning of the ice crystallization process. The desorption activation energy measured by temperature-programmed desorption (E-d = 42 +/-5 kJ.mol(-1)) is in good agreement with that calculated (E-d = 46 kJ.mol(-1)) and gives evidence of a hydrogen-bonded adsorbed state on amorphous ice films.

引用

页码：3437 / 3441

页数：5

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