结晶度
离子
星团(航天器)
分子
结构刚度
刚度(电磁)
离解(化学)
结晶学
化学物理
化学
材料科学
灵活性(工程)
分子动力学
纳米技术
计算化学
计算机科学
物理化学
有机化学
复合材料
结构工程
数学
工程类
统计
程序设计语言
作者
Jayanta Samanta,Rick W. Dorn,Wenlin Zhang,Xuan-Feng Jiang,Mingshi Zhang,Richard J. Staples,Aaron J. Rossini,Chenfeng Ke
出处
期刊:Chem
[Elsevier]
日期:2022-01-01
卷期号:8 (1): 253-267
被引量:15
标识
DOI:10.1016/j.chempr.2021.11.014
摘要
Porous organic frameworks that can dynamically expand their voids to guest uptake remain formidable to design. The challenge comes from finding the balance between rigidity and flexibility. Rigidity is required to retain the framework, and the flexibility is needed for reversible expansion/contraction. Herein, we introduced bisulfate anion clusters as soft joints to construct a single-crystalline hydrogen-bonded cross-linked organic framework HCOF-6. Upon the uptake of guest molecules, the anion clusters of HCOF-6 were disrupted, allowing the crystal to expand rapidly (<40 min) to more than twice its original length. Removing these guests restored the anion clusters and the crystallinity of HCOF-6 quickly (<10 min). These guest-induced material size expansions and contractions are highly reversible, and the dynamic anion cluster dissociation-reassociation is confirmed by molecular dynamics simulations and solid-state NMR experiments. The guest-induced size change of HCOF-6 highlights a new approach to synthesize dynamic framework materials by introducing anion clusters.
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