Molecular Spring-like Triple-Helix Coordination Polymers as Dual-Stress and Thermally Responsive Crystalline Metal-Organic Materials
Molecular Spring-like Triple-Helix Coordination Polymers as Dual-Stress and Thermally Responsive Crystalline Metal-Organic Materials
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分子弹簧状三螺旋配位聚合物作为双应力和热响应结晶金属有机材料。
DOI：
10.1002/anie.202003808
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Shi Wei-qun
中科院分区：
文献类型：
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作者：
Mei Lei;An Shu-wen;Hu Kong-qiu;Wang Lin;Yu Ji-pan;Huang Zhi-wei;Kong Xiang-he;Xia Chuan-qin;Chai Zhi-fang;Shi Wei-qun
提出了一种基于双应力和热响应性三螺旋配位聚合物的具有多种刺激响应能力的弹性金属-有机材料。在这些MOM中，强烈的金属配位连接和有机连接物的灵活性，而不是在有机晶体中观察到的4 ä堆积相互作用，使螺旋链起到分子弹簧的作用，从而解释了它们的宏观弹性。本文首次报道了弹性母体的热膨胀效应。不同温度下的晶体结构分析表明，这种热响应性是通过微调柔性V型有机连接体的开角和侧向共轭基团的旋转来实现的，从而证明了三螺旋金属有机链的自适应重组作为分子弹簧状基序在晶体跳跃中的重要作用。
Elastic metal–organic materials (MOMs) capable of multiple stimuli‐responsiveness based on dual‐stress and thermally responsive triple‐helix coordination polymers are presented. The strong metal‐coordination linkage and the flexibility of organic linkers in these MOMs, rather than the 4 Å stacking interactions observed in organic crystals, causes the helical chain to act like a molecular spring and thus accounts for their macroscopic elasticity. The thermosalient effect of elastic MOMs is reported for the first time. Crystal structure analyses at different temperatures reveal that this thermoresponsiveness is achieved by adaptive regulation of the triple‐helix chains by fine‐tuning the opening angle of flexible V‐shaped organic linkers and rotation of its lateral conjugated groups to resist possible expansion, thus demonstrating the vital role of adaptive reorganization of triple‐helix metal–organic chains as a molecular spring‐like motif in crystal jumping.