Influence of Au(III) Interactions with Chitosan on Gold Nanoparticle Formation

被引：50

作者：

Khoa Dang Nguyen Vo ^{[1
]}

Guillon, Emmanuel ^{[1
]}

Dupont, Laurent ^{[1
]}

Kowandy, Christelle ^{[1
]}

Coqueret, Xavier ^{[1
]}

机构：

[1] Univ Reims, UMR CNRS 7312, Inst Chim Mol Reims, F-51687 Reims 2, France

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2014年 / 118卷 / 08期

关键词：

X-RAY-ABSORPTION; ACID; SPECIATION; GOLD(III); BEHAVIOR; CHAINS; SIZE; XAS;

D O I：

10.1021/jp4112316

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：

Potentiometry, electronic spectroscopy, and X-ray absorption (XAS) experiments were carried out to monitor the course of the complexation reaction between AuCl4- and glucosamine moieties (GLA) of chitosan molecules. The disappearance of the ligand (pi)-metal (sigma*) charge transfer (LMCT) band at 313 nm, characteristic of the AuCl4- ion, upon the addition of chitosan evidenced the complexation of Au(III) with glucosamine moieties at pH 4. The coordination sphere of Au(III) was determined from the results of XAS experiments in the case of a [GLA]/[Au(III)] ratio equal to 1/4. The Au-Cl and Au-O(N) bond lengths were determined. Finally, preliminary results of gold nanoparticle synthesis by Au(III) reduction under electron beam in the presence of chitosan were presented. The influence of gold speciation on the size of preformed Au(0) clusters was evidenced.

引用

页码：4465 / 4474

页数：10

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