Specific Recognition of Methanol Using a Symmetric Tetramethylcucurbit[6]uril-Based Porous Supramolecular Assembly Incorporating Adsorbed Dyes
Specific Recognition of Methanol Using a Symmetric Tetramethylcucurbit[6]uril-Based Porous Supramolecular Assembly Incorporating Adsorbed Dyes
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DOI：
10.1071/ch19586
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发表时间：
2020-11
影响因子：
1.1
通讯作者：
F. Tian;Rui Cheng;Y. Zhang;Z. Tao;Qian-jiang Zhu
中科院分区：
文献类型：
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作者：
F. Tian;Rui Cheng;Y. Zhang;Z. Tao;Qian-jiang Zhu
在H2SO 4水溶液（5 M）中制备了对称的基于四甲基葫芦[6]脲的多孔超分子组装体。该组装体形成的驱动力主要是Q[n]的外表面相互作用，包括SO 42 −阴离子与对称四甲基葫芦[6]脲（TMeQ[6]）外表面正静电势之间的离子-偶极相互作用，TMeQ[6]外表面正静电势与TMeQ [6]门控羰基氧之间的偶极-偶极相互作用，以及TMeQ中晶格水分子和门控羰基氧原子之间的氢键[6]。基于TMeQ[6]的多孔超分子组装体表现出吸收荧光团客体（FG）的特性，例如具有不同荧光特性的染料和多环化合物。此外，所得的发光组件（FG@As）可以响应某些挥发性有机化合物，特别是，罗丹明B或芘的发光组件显示出独特的荧光增强响应甲醇。
A symmetric tetramethylcucurbit[6]uril-based porous supramolecular assembly was prepared in an aqueous H2SO4 solution (5 M). The driving force for the formation of this assembly is mainly the outer surface interaction of Q[n], which includes the ion-dipole interaction of SO42− anions and the positive electrostatic potential of the outer surface of the symmetric tetramethylcucurbit[6]uril (TMeQ[6]), the dipole-dipole interactions between the positive electrostatic potential of the outer surface of TMeQ[6] and portal carbonyl oxygens of TMeQ[6], and the hydrogen bonding between lattice water molecules and portal carbonyl oxygen atoms in TMeQ[6]. The TMeQ[6]-based porous supramolecular assembly exhibits the characteristics of absorbed fluorophore guests (FGs), such as dyes and polycyclic compounds with different fluorescence characteristics. Moreover, the resulting luminescent assemblies (FG@As) can respond to certain volatile organic compounds; in particular, the luminescent assemblies of rhodamine B or pyrene display a unique fluorescence enhancement in response to methanol.