Hexamethylcucurbit[3,3]uril-Based Porous Supramolecular Assemblies and Their Adsorption Properties

In
the present work, we selected hexamethylcucurbit­[3,3]­uril (Me6Q­[3,3]) as a building block and obtained two Me6Q­[3,3]-based porous supramolecular assemblies from neutral water
(A) and aqueous HCl solutions (B), respectively.
Both Me6Q­[3,3]-based assemblies are constructed of Me6Q­[3,3] molecules through the typical outer surface interaction
of cucurbit­[n]­urils, as well as hydrogen bonding
between latticed water molecules and portal carbonyl oxygens of Me6Q­[3,3]. The assemblies present different porous structure
features and exhibit different adsorption properties for eight common
volatile organic compounds. However, the two porous assemblies exhibit
similar adsorption properties for certain fluorophore dyes, including
rhodamine B (G1), fluorescein (G2), and
pyrene (G3), and form solid colored fluorescent compounds,
some of which exhibit responses to the selected volatile organic compounds.

在本项研究中，我们选取六甲基环脲[3,3]（Me6Q[3,3]）作为构建模块，分别从中性水溶液（A）和水溶液HCl（B）中获得了两种基于Me6Q[3,3]的 porous 超分子组装体。这两种基于Me6Q[3,3]的组装体均通过典型的葫芦脲[n]脲的外表面相互作用，以及晶格水分子与Me6Q[3,3]的门户羰基氧之间的氢键形成。这些组装体呈现出不同的 porous 结构特征，并表现出对八种常见挥发性有机化合物不同的吸附性能。然而，这两种 porous 组装体对某些荧光染料，如罗丹明B（G1）、荧光素（G2）和芘（G3）表现出相似的吸附性能，并形成具有固体颜色的荧光化合物，其中一些对选定的挥发性有机化合物产生响应。