Controllable Transition Metal-Directed Assembly of [Mo2O2S2]2+Building Blocks into Smart Molecular Humidity-Responsive Actuators

被引：25

作者：

Li, Bo ^{[1
]}

Duan, Xiaozheng ^{[2
]}

Cheng, Dongming ^{[1
]}

Chen, Xinyu ^{[1
]}

Gao, Zhixin ^{[1
]}

Ren, Weibo ^{[1
]}

Shao, Kui-Zhan ^{[1
]}

Zang, Hong-Ying ^{[1
]}

机构：

[1] Northeast Normal Univ, Key Lab Nanobiosensing Nanobioanal Univ Jilin Prov, Inst Funct Mat Chem, Key Lab Polyoxometalate,Sci Minist Educ,Fac Chem, Changchun 130024, Peoples R China

[2] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2023年 / 145卷 / 04期

基金：

中国国家自然科学基金;

关键词：

WATER; DRIVEN;

D O I：

10.1021/jacs.2c10225

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Smart molecular actuators have become a cutting-edge theme due to their ability to convert chemical energy into mechanical energy under external stimulations. However, realizing actuation at the molecular level and elucidating the mechanisms for actuating still remain challenging. Herein, we design and fabricate a novel nanoscaled polyoxometalate-based humidity-responsive molecular actuator {Bi8Mo48} through the assembly of [Mo2O2S2]2+ units, transition metals, and flexible phosphonic acid ligands. {Bi8Mo48} exhibits a semi-flexible cage-like architecture with oxygen-rich surfaces and highly negative charges 72-. The nanoscaled molecular actuator shows reversible expansion and contraction behavior under humidity variations due to lattice expansion and contraction induced by hydrogen bonding and solvation interactions between {Bi8Mo48} and water molecules. Molecular dynamics simulation was further employed to study these processes, which provides a fundamental understanding for the mechanism of humidity actuation at the molecular level.

引用

页码：2243 / 2251

页数：9

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