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Thermal and Gas Dual‐Responsive Behaviors of an Expanded UiO‐66‐Type Porous Coordination Polymer
Author(s) -
Zhou HaoLong,
Bai Jie,
Ye JiaWen,
Mo ZongWen,
Zhang WeiXiong,
Zhang JiePeng,
Chen XiaoMing
Publication year - 2016
Publication title -
chempluschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.801
H-Index - 61
ISSN - 2192-6506
DOI - 10.1002/cplu.201600145
Subject(s) - chemistry , benzoic acid , crystallinity , ligand (biochemistry) , luminescence , single crystal , coordination polymer , metal organic framework , solvent , crystallography , polymer chemistry , crystal structure , organic chemistry , optics , biochemistry , receptor , adsorption , physics
Abstract Through a modified solvothermal reaction using benzoic acid as an additive, the fcu ‐type framework [Zr 6 O 4 (OH) 4 (edba) 6 ] (H 2 edba=4,4′‐(ethyne‐1,2‐diyl)dibenzoic acid), an expanded version of UiO‐66, is synthesized as high‐quality single crystals, which can retain their single‐crystallinity after solvent exchange and degas treatments. In situ variable‐temperature single‐crystal X‐ray diffraction measurements show that the guest‐free framework exhibits a remarkably large isotropic negative thermal expansion ( α =−11.0×10 −6 K −1 ) as a result of the transverse vibrational bending of the long organic ligand. By virtue of the relatively large π‐conjugation system of the organic ligand, [Zr 6 O 4 (OH) 4 (edba) 6 ] also exhibits bright blue luminescence, which can be quenched efficiently by gaseous O 2 ( K sv =2.4 bar −1 ).