来自化的溶剂敏感无孔自适应晶体和在吸附中的应用
Yi Chen1, Xiaojuan Song1, Aisen Li2
1Institute of Molecular Aggregation Science, Tianjin University, Tianjin, 300072, China.
Advanced materials (Deerfield Beach, Fla.)
|May 16, 2024
概括
一个新的有机晶体,TPAPyH,显示适应性晶体性,形成多孔结构来捕获. 这一发现推进了用于选择性挥发性化合物吸附的无孔适应性晶体 (NAC).
科学领域:
- 材料科学 材料科学 材料科学
- 晶体学 晶体学是指结晶学.
- 超分子化学 超分子化学
背景情况:
- 无孔适应性晶体 (NAC) 是一种晶体材料,可以改变其结构以纳入客分子.
- 基于pillararene的NAC是常见的,因为它们的结构灵活和固有的多孔性.
- 在先进的分离和存储应用中,开发具有可调节性能的新NAC至关重要.
研究的目的:
- 报告一种新型有机化物,即4 - - - - - - - - - - - - - - - - - - - - - - - 双氨基化物 (TPAPyH),具有依赖于溶剂的适应性结晶性.
- 调查TPAPyH的结构转型和客人住宿能力.
- 评估TPAPyH在储存中的性能,并探索其用于挥发性化合物分离的潜力.
主要方法:
- 对TPAPyH.的合成和表征.
- 单晶X射线衍射以确定晶体结构 (α,β和γ相).
- 热重力测量分析 (TGA) 用于研究热稳定性和相变.
- 对的吸收和释放进行吸附-脱附实验.
主要成果:
- 在大尺寸溶剂中,TPAPyH形成无孔的α晶体,在小尺寸溶剂中形成有孔的β和γ晶体.
- 一个单晶到单晶 (SCSC) 从多孔β阶段到无孔α阶段的过渡是由热引起的.
- 在接触时,无孔的α阶段转化为多孔的β阶段,形成I2Cl-.
- TPAPyH具有较高的储存能力 (1.27 g g-1),并具有较高的溶解温度.
结论:
- TPAPyH表现出独特的依赖溶剂的适应性结晶性和可逆的结构转变.
- 该材料在储存方面表现出色,突出了其对气体捕获的潜力.
- TPAPyH的适应性为选择性吸附和分离中的无孔适应性晶体提供了一个新的设计策略.
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