高核Ag/S纳米团簇合成的研究进展

Progress of the Synthesis of High-Nuclearity Ag/S Nanoclusters

硫醇配体保护的高核银纳米团簇具有丰富的结构和性能,在光致发光、生物传感、纳米材料等方面具有广阔的应用前景.然而,精确控制高核Ag/S纳米团簇的尺寸和结构面临着巨大的挑战,构建高核Ag/S纳米团簇的可行策略也一直是人们关注的焦点.近年来,随着合成方法和表征技术的不断发展,高核Ag/S纳米团簇的合成和性能研究方面均取得了显著的成就.本文总结了含20个或以上Ag原子的Ag/S纳米团簇的合成方法(直接还原法、阴离子模板法及配体交换法),对部分高核Ag/S纳米团簇的结构进行了探讨,并展望了未来研究的趋势.

The high-nuclearity silver nanoclusters protected by thiol ligands not only have beautiful structures and attractive functionalities,but also have broad application prospects in photoluminescence,biosensing and imaging,nanomaterials etc. However,the precise control of the size and structure of high-nuclearity Ag/S nanoclusters remains a great challenge. Therefore,feasible synthetic strategies to construct high-nuclearity Ag/S nanoclusters have always been the focus of attention. In recent years,with the development of synthetic approaches and characterization techniques,significant achievements have been made in the synthesis and functionality of high-nuclearity Ag/S nanoclusters. In this review,the general synthesis methods of high-nuclearity Ag/S nanoclusters containing 20 or more silver centers(direct reduction method,anion-templated method,ligand exchange method)were introduced and summarized,and structures of some high-nuclearity Ag/S nanoclusters were discussed. Finally,some prospects on the trend of future research in this respect are given.