Dynamic Full‐Color Tuning of Organic Chromophore in a Multi‐Stimuli‐Responsive 2D Flexible MOF

Developing universal stimuli‐responsive materials capable of emitting a broad spectrum of colors is highly desirable. Herein, we deliberately grafted a conformation‐adaptable organic chromophore into the established coordination space of a flexible metal–organic framework (MOF). In terms of the coup...

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Published inAngewandte Chemie Vol. 134; no. 17
Main Authors Yao, Zhao‐Quan, Wang, Kai, Liu, Rui, Yuan, Yi‐Jia, Pang, Jing‐Jing, Li, Quan Wen, Shao, Tian Yin, Li, Zhi Gang, Feng, Rui, Zou, Bo, Li, Wei, Xu, Jian, Bu, Xian‐He
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 19.04.2022
Subjects
Chemical stimuli
Chemistry
Chromophores
Color
Conformation
Coordination
Crystal structure
Crystals
Flexible Metal–Organic Frameworks
Metal-organic frameworks
Multi-Stimuli-Chromism
Smart Luminescent Materials
Stimuli
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Summary:Developing universal stimuli‐responsive materials capable of emitting a broad spectrum of colors is highly desirable. Herein, we deliberately grafted a conformation‐adaptable organic chromophore into the established coordination space of a flexible metal–organic framework (MOF). In terms of the coupled structural transformations and the space confinement, the chromophore in the MOF matrix underwent well‐regulated conformational changes under physical and chemical stimuli, simultaneously displaying thermo‐, piezo‐, and solvato‐fluoro‐chromism with color tunability over the visible range. Owing to the resilient nature and the reduced dimensionality of the selected coordination space, all three color modulations behaved in a sensitive and self‐reversible manner, each following a linear correlation of the emission maximum with stimulus. Single‐crystal X‐ray diffraction of the variable‐temperature structures and solvent‐inclusion crystals elucidated the intricate color varying mechanisms. A smart luminescent material was constructed by anchoring an organic chromophore into the 2D coordination space of a flexible metal–organic framework. Thermo‐, piezo‐, and solvato‐fluoro‐chromisms were simultaneously achieved within a single material, featuring dynamic full‐color tunability, excellent reversibility, and linear sensor response.
ISSN:0044-8249
1521-3757
DOI:10.1002/ange.202202073