Mixed-Monolayer-Protected Au-25 Clusters with Bulky Calix[4]arene Functionalities

作者：Hassinen Jukka; Pulkkinen Petri; Kalenius Elina; Pradeep Thalappil; Tenhu Heikki; Hakkinen Hannu; Ras Robin H A^*

来源：Journal of Physical Chemistry Letters, 2014, 5(3): 585-589.

DOI：10.1021/jz500052h

Although various complex, bulky ligands have been used to functionalize plasmonic gold nanoparticles, introducing them to small, atomically precise gold clusters is not trivial. Here, we demonstrate a simple one-pot procedure to synthesize fluorescent magic number Au-25 clusters carrying controlled amounts of bulky calix[4]arene functionalities. These clusters are obtained from a synthesis feed containing binary mixtures of tetrathiolated calix[4]arene and 1-butanethiol. By systematic variation of the molar ratio of ligands, clusters carrying one to eight calixarene moieties were obtained. Structural characterization reveals unexpected binding of the calix[4]arenes to the Au25 cluster surface with two or four thiolates per moiety.

• 出版日期2014-2-6