摘要
提出一种合成金的单分子层保护团簇 (monolayer-protected clusters,MPCs)的新方法 .在四氢呋喃饱和 Na Cl水溶液的两相体系中 ,用相转移剂四丁基溴化铵将四氯合金酸根离子转移至有机相中 ,在己硫醇存在下用硼氢化钠进行快速还原 ,合成出分布均匀、粒径较小的纳米粒子 .通过改变金与硫醇的比例 ,可有效地控制 MPCs颗粒的大小 .与现有的合成方法相比 ,成本降低 ,合成时间显著缩短 ,易获得纯度较高的 MPCs.所得产物通过透射电子显微镜术、紫外可见光谱和红外光谱测量等方法进行了表征 。
A new method for synthesis of monolayer\|protected clusters (MPCs) is described. In the new two\|phase system of tetrahydrofuran/saturated electrolyte, the AuCl - 4 anion is transferred into the organic phase from aqueous phase with a transference catalyst of tetra n butylammonium boromide ((C 4H 9) 4NBr) and reduced quickly by sodium borohydride in the presence of n hexanthiol from which the uniform smaller size of MPCs is obtained. Changing the mole ratio of S to Au can control the core dimension of MPCs. Compared with other methods reported, it enjoys lower cost, faster synthesis and higher purity. The MPCs prepared is characterized by transmission electron microscope, ultraviolet\|visible spectroscope and Fourier transform infrared spectroscope. The results show that the MPCs properties are consistent with the reports published before.
出处
《扬州大学学报（自然科学版）》
CAS
CSCD
2002年第3期27-31,共5页
Journal of Yangzhou University：Natural Science Edition
基金
国家自然科学基金资助项目 (2 0 175 0 2 3)
