Synthesis of Pyridineethanethiol-Protected Au25 Nanoclusters

摘要

Recently, Au nanoclusters stabilized by animo-terminated thiolate ligands, cystamine (HSCH2CH2NH2) and 4-amino-thiophenol (HSPhNH2), have been reported for future application in biomedical research, but the as-obtained Au25 nanoclusters lack the purity and thermal stability. In this regard, for the first time we used pyridineethanethiol (HSCH2CH2C5H5N, 4-P*ET or 2-P*ET) for the Au nanocluster synthesis because compared with the most-widely-used thiolate ligand, 4-phenylethanethiol (4-PET), P*ET has almost same molecular structure except one nitrogen replaces one carbon in the para (or ortho)-position of the aromatic group. The P*ET-protected nanoclusters are excepted to hold similar thermal stability as of the 4-PET-protected Au nanoclusters.