由非手性组分构成的超小铜-银双金属簇离子对中的可控自发拆分

Controllable spontaneous resolution in ultrasmall Cu-Ag bimetallic cluster ion pairs from achiral components.

作者信息

He Jiao, Deng Cheng-Long, Sun Cun-Fa, Zhang Xiao-Xiao, Cui Ying, Wu Sheng-Hui, Luo Geng-Geng

机构信息

College of Materials Science and Engineering, Huaqiao University, Xiamen 361021, P. R. China.

State Key Laboratory of Photocatalysis on Energy and Environment Fuzhou University, Fuzhou 350116, P. R. China.

出版信息

Chem Commun (Camb). 2022 Feb 1;58(10):1577-1580. doi: 10.1039/d1cc05135k.

DOI:10.1039/d1cc05135k

PMID:35014990

Abstract

Bimetallic cluster ion pairs containing a quaternary phosphonium and an ultrasmall CuAg anionic cluster protected by thiolates: (PPhR'')[CuAg(SR')] (R'SH = cyclohexylthiol (CySH), R'' = Ph, 1; Me, 2; Et, 3; Pr, 4; R'SH = -butylthiol (BuSH) and R'' = Ph, 5) were reported. Without any chiral source, 1 crystallizes as conglomerate crystals with homochiral packings and spontaneous resolution occurs, while four other clusters 2-5 crystallize as racemic crystals with heterochiral packings. These results indicate that racemic and homochiral crystallization in the cluster system could be controlled through fine-tuning internal achiral structural components.

摘要

含季鏻和由硫醇盐保护的超小铜银阴离子簇的双金属簇离子对

(PPhR'')[CuAg(SR')]（R'SH = 环己硫醇（CySH），R'' = Ph，1；Me，2；Et，3；Pr，4；R'SH = 叔丁硫醇（BuSH）且R'' = Ph，5）已被报道。在没有任何手性源的情况下，1以具有同手性堆积的聚集体晶体形式结晶并发生自发拆分，而其他四个簇2 - 5以具有异手性堆积的外消旋晶体形式结晶。这些结果表明，通过微调内部非手性结构成分，可以控制簇体系中的外消旋和同手性结晶。