Piezochromic Porous Metal-Organic Framework

被引：59

作者：

Andrzejewski, Michal ^{[1
]}

Katrusiak, Andrzej ^{[1
]}

机构：

[1] Adam Mickiewicz Univ, Fac Chem, Dept Chem Mat, Umultowska 89b, PL-61614 Poznan, Poland

来源：

JOURNAL OF PHYSICAL CHEMISTRY LETTERS | 2017年 / 8卷 / 01期

关键词：

TO-BLACK PIEZOCHROMISM; CRYSTAL; COMPRESSIBILITY; CALIBRATION; ADSORPTION; MECHANISM; BEHAVIOR;

D O I：

10.1021/acs.jpclett.6b02458

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Pressure changes the color of a new type of metal-organic porous hybrid material CoBbcDabcoH(2)O. It is built of Co2+ cations linked by 1,4-benzenedicabroxylate (Bdc) anions and 1,4-diazabicyclo[2.2.2]octane (Dabco) molecules into 2-D grid-like sheets, interconnected through OH center dot center dot center dot O bonds of water molecules to carboxylate H-acceptors. This first piezochromic MOF, stable in air and in many solvents, is an ideal ultraprecise sensor for pressure calibration. The color changes are due to strains generated by pressure in the highly asymmetric crystal field of Co2+ octahedral coordination, involving four different ligand types: a Dabco amine (twice), a monodentate carboxylate, a chelating carboxylate, and a water molecule. At 0.33 GPa/296 K and below 225 K/0.1 MPa a phase transition reduces the crystal symmetry from monoclinic to triclinic system and changes the conformation and orientation of linkers.

引用

页码：279 / 284

页数：6

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