Luminescence Regulation of <scp>Silver‐Thiolate</scp> Clusters Protected by 1,<scp>2‐Dithiolate</scp>‐<i>o</i>‐carborane
Li‐Juan Liu, Thomas C. W. Mak, Shuang‐Quan Zang
Abstract
Main observation and conclusion Engineering the surface of the metal clusters with the core structure maintained and tuning their luminescence in a wide range is still a challenge in the nanomaterial research. We modified six mono‐pyridyl ligands with different electronic effects (conjugation effect or induction effect) on a superatomic silver cluster [Ag 14 (C 2 B 10 H 10 S 2 ) 6 (CH 3 CN) 8 ] (denoted as Ag 14 ) through in situ site‐specific surface engineering, and obtained the corresponding clusters [Ag 14 (C 2 B 10 H 10 S 2 ) 6 (CH 3 CN) 6 (L 1 /L 2 ) 2 ] (denoted as NC‐1, 2, L 1 /L 2 = 4‐acetylpyridine/ 4‐carboxypyridine) and [Ag 14 (C 2 B 10 H 10 S 2 ) 6 (L 3 /L 4 /L 5 /L 6 ) 8 ] (denoted as NC‐3, 4, 5, 6, L 3 /L 4 /L 5 /L 6 = 4‐phenylpyridine/4‐(1‐naphthyl)pyridine/9‐(4‐pyridine)anthracene/9‐(4‐pyridine)pyrene). Through the modification of the Ag 14 cluster, a wide‐range luminescence from blue to red was realized. This work might provide a practical guide for improving the emission performance of metal clusters via surface engineering.