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Published on: May 9, 2014
Threefold Collaborative Stabilization of Ag14 -Nanorods by Hydrophobic Ti16 -Oxo Clusters and Alkynes: Designable
Xi Fan1,2, Furong Yuan1, Dejing Li2
1Fujian Provincial Key Laboratory of Polymer Materials, College of Chemistry and Materials Science, Fujian Normal University, 32 Shangsan Road, Fuzhou, 350007, P. R. China.
Abstract:
Ag nanoclusters have received increasing attention due to their atomically precise and diverse structures and intriguing optical properties. Nevertheless, the inherent instability of Ag nanoclusters has seriously hindered their practical application. In this work, for the first time, Ag clusters are collaboratively protected by hydrophobic Ti-oxo clusters and alkyne ligands. Initially, a pyramidal Ag5 cluster terminated with t BuC≡C- and CH3 CN was inserted into the cavity of a Ti8 -oxo nanoring to form Ag5 @Ti8 . To overcome the instability of acetonitrile-terminated silver site, such two Ag5 @Ti8 clusters could sandwich an Ag4 unit to form Ag14 -nanorod@Ti16 -oxo-nanoring (Ag14 @Ti16 ), which is peripherally protected by fluorophenyl groups and alkyne caps. This threefold protected (hydrophobic fluorinated organic layer, Ti-O shell, and terminal alkyne ligands) Ag14 @Ti16 exhibits superhydrophobicity and excellent ambient stability, endowing it with solid-state optical limiting characteristics.
