Titanium-Oxide Host Clusters with Exchangeable Guests

被引：86
|
作者：
Zhang, Guanyun [1 ]
Li, Wenyun [1 ]
Liu, Caiyun [1 ]
Jia, Jiong [1 ]
Tung, Chen-Ho [1 ]
Wang, Yifeng [1 ]
机构：
[1] Shandong Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Colloid & Interface Sci, Jinan 250100, Shandong, Peoples R China
来源：
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2018年 / 140卷 / 01期
关键词：
METAL-ORGANIC FRAMEWORKS; PHOTOCHEMISTRY; ENCAPSULATION; COMPLEXES; CAGES;
D O I：
10.1021/jacs.7b10565
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A novel family of water-soluble, polyoxocationic titanium-oxide host-guest clusters are reported herein. They exhibit an unprecedented hexagonal prismatic core structure for hosting univalent cationic guests like K+, Rb+, Cs+ and H3O+. Guest exchange has been studied using Cs-133 NMR, showing the flexible pore of a host permits passage of a comparatively larger cation and giving an equilibrium constant of ca. 13 for displacing Rb+ by Cs+. Attractive ion-dipole interaction, depending on host?guest size complementarity, plays a dominant role for the preferential encapsulation of larger alkali-metal cationic guests.
引用
收藏
页码：66 / 69
页数：4
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