Flexibility Control of Two‐Dimensional Coordination Polymers by Crystal Morphology: Water Adsorption and Thermal Expansion
Flexibility Control of Two‐Dimensional Coordination Polymers by Crystal Morphology: Water Adsorption and Thermal Expansion
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通过晶体形态控制二维配位聚合物的柔性：水吸附和热膨胀
DOI：
10.1002/chem.202103404
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Ohba Masaaki
中科院分区：
文献类型：
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作者：
Ohtani Ryo;Yoshino Haruka;Yanagisawa Junichi;Ohtsu Hiroyoshi;Hashizume Daisuke;Hijikata Yuh;Pirillo Jenny;Sadakiyo Masaaki;Kato Kenichi;Shudo Yuta;Hayami Shinya;Le Ouay Benjamin;Ohba Masaaki
二维配位聚合物（2D-CP）中的层柔性有助于多种功能材料，因为它导致对外部刺激的各向异性结构响应。化学改性是用于改性层结构的常用技术。该研究表明，由柔性起伏层组成的[Mn（salen）]2[ReN（CN）4]（1）型氰化物桥接的2D-CP的晶体形态显著影响层配置和组装。1的纳米片显示出与微米尺寸的棒状颗粒相比具有更长层间距离的层的面内收缩。晶体形态对2D-CP结构的这些影响了结构的灵活性，导致双重功能的变化：结构转变对水吸附的敏感性增强和各向异性热膨胀的修改1。此外，纳米片在层内结合了新的吸附位点，导致与微米尺寸的棒相比吸收了额外的水分子。
Layer flexibility in two‐dimensional coordination polymers (2D‐CPs) contributes to several functional materials as it results in anisotropic structural response to external stimuli. Chemical modification is a common technique for modifying layer structures. This study demonstrates that crystal morphology of a cyanide‐bridged 2D‐CP of type [Mn(salen)]2[ReN(CN)4] (1) consisting of flexible undulating layers significantly impacts the layer configuration and assembly. Nanoplates of1showed an in‐plane contraction of layers with a longer interlayer distance compared to the micrometer‐sized rod‐type particles. These effects by crystal morphology on the structure of the 2D‐CP impacted the structural flexibility, resulting in dual‐functional changes: the enhancement of the sensitivity of structural transformation to water adsorption and modification of anisotropic thermal expansion of1. Moreover, the nanoplates incorporated new adsorption sites within the layers, resulting in the uptake of an additional water molecule compared to the micrometer‐sized rods.