Influence of configuration of carboxylic, acid capping ligands on the salt-induced aggregation of gold clusters

被引：7

作者：

Li, D

Huang, YJ

Li, JH ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China

[2] Tsing Hua Univ, Dept Chem, Beijing 100084, Peoples R China

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2005年 / 283卷 / 02期

关键词：

gold colloid; carboxylic acid; configuration; salt-induced aggregation;

D O I：

10.1016/j.jcis.2004.09.024

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：

Oxalic acid (Ox) and 1,2,3,4-cyclobutanetetracarboxylic acid (CBTCA) were employed as capping ligands in the preparation of gold colloids. FTIR indicated that Ox adopted a linear configuration through one oxygen atom and one gold atom, while CBTCA adopted a bridge configuration through two oxygen atoms and two gold atoms. Ox-gold colloids exhibited aggregation upon addition of NaClO4, while they remained as isolated particles upon NaCl. For CBTCA-gold colloids, not NaClO4 but NaCl resulted in aggregation. The reversed results were considered to have been influenced by the different configurations of Ox and CBTCA, which were combined results of the Lewis basicity and steric hindrance of the added ions. (C) 2004 Elsevier Inc. All rights reserved.

引用

页码：440 / 445

页数：6

共 21 条

[1] Morphology-dependent electrochemistry of cytochrome c at Au colloid-modified SnO2 electrodes [J].