空气中烷硫醇单分子层从金表面解吸的动力学

Kinetics of alkanethiol monolayer desorption from gold in air.

作者信息

Shadnam Mohammad Reza, Amirfazli A

机构信息

Surface Engineering and Instrumentation Laboratory, University of Alberta, Edmonton, Canada.

出版信息

Chem Commun (Camb). 2005 Oct 14(38):4869-71. doi: 10.1039/b507179h. Epub 2005 Aug 30.

DOI:10.1039/b507179h

PMID:16193142

Abstract

Thermal desorption of an alkanethiol monolayer from a gold substrate into a gaseous medium under ambient pressure was investigated using XPS and it was found that there exist 2 consecutive 1st order kinetics mechanisms with activation energies of 29.9 and 32.7 kcal mol(-1), respectively, i.e. on average approximately 15% higher than reports for liquid media desorption.

摘要

在环境压力下，使用X射线光电子能谱（XPS）研究了自金基底到气态介质中链烷硫醇单分子层的热脱附，结果发现存在2个连续的一级动力学机制，其活化能分别为29.9和32.7千卡/摩尔（-1），即平均比液体介质脱附的报道值高约15%。