ReversibleWater Uptake by a Porous Molecular Crystal from Metal Complex of GeminiSurfactant
ReversibleWater Uptake by a Porous Molecular Crystal from Metal Complex of GeminiSurfactant
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多孔分子晶体从 Gemini 表面活性剂金属络合物中可逆吸水
DOI：
10.1039/c6ce02197b
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Honglai Liu
中科院分区：
文献类型：
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作者：
Junyao Yao;Qibin Chen;Yujie Sheng;Aiting Kai;Honglai Liu
我们提出了一种新的多孔分子晶体（PMC）构建使用金属配合物，它显示了一个引人注目的功能，即这种晶体表现出可逆的晶体结构的转变时，进行水的去除/吸收周期。结果发现，脱水晶体吸附一定量的水，即每个复杂的组装块，来自两个双子表面活性剂分子与联吡啶间隔和两个铜离子（Cu 2+）协调，坚持10个分子的水。此外，晶体中包含的水可能会产生独特的二维（2D）氢键网络，包括金属配体络合物单元，抗衡离子和结晶水。特别是，去溶剂化后晶体结构没有被破坏，这归因于引入的金属离子以及提供额外静电相互作用和氢键的反离子（Br-）。我们的研究结果表明，金属离子的引入可能会提供一个替代的共同弱相互作用时，设计PMC。此外，这种晶体材料对水分敏感，扩展了这种双子物种在化学传感器和潮湿环境中的潜在应用范围。
We present a novel porous molecular crystal (PMC) constructed using metal complexes, which shows a striking feature, namely that such a crystal exhibits a reversible transition in the crystal structure when subjected to water removal/uptake cycles. It was found that the dehydrated crystal adsorbed a given quantity of water, that is, each complex assembling block, derived from two gemini surfactant molecules with a bipyridyl spacer and two copper ions (Cu2+) coordinated, stuck to 10 molecules of water. Also, the water included in crystals might generate a unique two-dimensional (2D) hydrogen bond network, including metal–ligand complex units, counter ions and crystalline water. Specially, the crystalline structure was not destroyed upon desolvation, which is ascribed to the metal ion introduced as well as the counter ion (Br−) providing additional electrostatic interactions and hydrogen bonds. Our findings indicate that the introduction of metal ions may provide an alternative to the common weak interactions when designing PMCs. In addition, this crystal material is sensitive to moisture, extending the scope of such a gemini species for potential applications in chemical sensors and in humid environments.