In situ modification of the surface of gold colloidal particles. Preparation of cyclodextrin-based rotaxanes supported on gold nanospheres

被引:84
作者
Liu, J
Xu, RL
Kaifer, AE [1 ]
机构
[1] Univ Miami, Supramol Sci Ctr, Coral Gables, FL 33124 USA
[2] Univ Miami, Dept Chem, Coral Gables, FL 33124 USA
[3] Beckman Coulter, Particle Characterizat, Miami, FL 33116 USA
关键词
D O I
10.1021/la981385q
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A new method for the surface derivatization of gold colloidal particles is reported. The method is based on the aqueous solubilization of aliphatic thiols by alpha-cyclodextrin, which effectively binds to the aliphatic chains and carries the hydrophobic thiol molecules to the surface of the gold particles, where they undergo chemisorption. This method can be used to prepare gold colloidal particles (diameter > 10 nm) modified with long chain alkanethiolates. if the alkanethiol contains a bulky terminal group, such as ferrocene, the alpha-cyclodextrin host is trapped after surface attachment, yielding cyclodextrin-based rotaxanes supported on the gold nanospheres.
引用
收藏
页码:7337 / 7339
页数:3
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