Functions Based on Dynamic Structural Changes of Coordination Polymers

Functions Based on Dynamic Structural Changes of Coordination Polymers
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DOI：
10.1002/9780470661345.smc133
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发表时间：
2012-03
期刊：
--
影响因子：
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通讯作者：
M. Kondo
M. Kondo
中科院分区：
其他
文献类型：
--
作者：
M. Kondo

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介绍了基于动态结构变化的柔性配位聚合物(FCP)的独特功能。本文将具有柔性结构的配位聚合物分为四类。类型I显示了多孔性和非多孔性骨架之间的可逆相互转化，以响应客体分子从通道中移除和重新包含到通道中。呈现I型结构变化的FCP是一般性的。II型FCP根据客体分子的不同，在多孔性和非多孔性框架之间显示出可逆的开关。具有可逆结构变化的二维配位聚合物已被作为第二类FCP的例子给出。III型FCP涉及从非多孔化合物中为额外的客体分子创建空闲通道，这是由化学刺激触发的。氢键组装的金属络合物已被展示为Tpye III材料的一个例子。IV型FCP具有根据物理刺激呈现可逆变换的通道结构。III型和IV型FCP是罕见和独特的。证明了乙醇客体分子的吸附是由于添加了较小的客体分子CH3OH而引起的。物理刺激诱导的闭合通道中客体分子的机械捕获被描述为FCP，显示了IV型结构变化。关键词：配位聚合物；柔性配位骨架；动态通道；多孔骨架；化学刺激；物理刺激；结构转化；金属有机骨架；晶体结构；机械捕获
The unique functions of flexible coordination polymers (FCPs) based on the dynamic structural changes are described. Coordination polymers with flexible structures have been classified into four types in this review. Type I shows reversible interconversions between porous and nonporous frameworks in response to removals and reinclusions of guest molecules from/into the channels. FCPs that exhibit Type I structural changes are general. Type II FCPs show reversible switches between the porous and nonporous frameworks depending on the guest molecules. The two-dimensional coordination polymers that show reversible structural changes in response to the present solvents have been presented as examples of Type II FCPs. Type III FCPs involve the creation of vacant channels for additional guest molecules from nonporous compounds, which is triggered by chemical stimuli. The hydrogen bond-assembled metal complex has been shown as an example of Tpye III materials. Type IV FCPs have the channel structures that show reversible transformations depending on the physical stimuli. Type III and IV FCPs are rare and unique. Adsorption of EtOH guest molecules induced by the addition of CH3OH, which is a smaller guest molecule, is demonstrated. Mechanical trapping of guest molecules in the closed channels induced by physical stimuli is presented as FCPs demonstrating Type IV structural changes. Keywords: coordination polymer; flexible coordination frameworks; dynamic channels; porous framework; chemical stimuli; physical stimuli; structural conversion; metal–organic frameworks; crystal structure; mechanical trapping