preparation of length‐controlleddiscrete tubular structures by homo‐/co‐assembly of rim‐differentiated and peralkylamino‐substituted pillar[5]arenes via hydrogen bonds and salt bridges. By dimerization and trimerization, the expanded tubes show a fivefold helical structure and stepwise binding, respectively. We found that the exchange speed of guest molecules in the tubes could be controlled by varying
A room-temperature ionic liquid containing macrocyclic compound pillar[5]arene in its core was synthesized. The ionic liquid showed high thermal stability, moderate ionic conductivity and solvent-free complexation ability with the guest tetracyanoethylene.
A supramolecular synergistic antibacterial strategy involving direct complexation of a commercial antibacterial agent, azelaic acid (AzA) by a cationic pillar[5]arene (WP5A) is described.
Temperature-driven chirality inversion of complexes of bromoalkyl-substituted pillar[5]arenes
作者:Chunhong Liu、Jiecheng Ji、Wanhua Wu、Cheng Yang
DOI:10.1016/j.tetlet.2023.154644
日期:2023.7
A variety of bromoalkyl-substituted pillar[5]arenes (PBrn) were synthesized, and the complexation of PBrn with amino acid derivatives induced chiroptical response as a result of the Rp and Sp conformational equilibrium shift. The induced circular dichroism (CD) properties were a function of the chemical structure of amino acid derivatives. Interestingly, the CD induced by the cysteine derivative was
合成了多种溴代烷基取代的柱[5]芳烃( P Brn ), P Brn与氨基酸衍生物的络合由于R p和S p构象平衡位移而诱导手性光学响应。诱导圆二色性(CD)特性是氨基酸衍生物化学结构的函数。有趣的是,半胱氨酸衍生物诱导的CD严重依赖于温度,温度的变化甚至导致CD符号的反转。P Brn独特的手性光学诱导行为与烷基取代的柱[5]芳烃不同,讨论了手性光学反转的可能机制。
Molecular Recognition with Microporous Multilayer Films Prepared by Layer-by-Layer Assembly of Pillar[5]arenes
作者:Tomoki Ogoshi、Shu Takashima、Tada-aki Yamagishi
DOI:10.1021/jacs.5b07415
日期:2015.9.2
Pillar[5]arene-based multilayer films are constructed by layer-by-layer assembly with consecutive adsorption of cationic and anionic pillar[5]arenes. The films have active pores that allow shape-selective uptake of dinitrobenzene isomers: the film adsorbs para-dinitrobenzene, but not ortho- and meta-dinitrobenzene. The ability of the film to adsorb para-dinitrobenzene is result of the surface electrostatic potential: para-dinitrobenzene adsorbs on films with a positive surface, but not on films with a negative surface. The adsorbed amount of para-dinitrobenzene exponentially increases with increasing number of deposited layers.