%0 Journal Article
%T Six-Cyclic Crown Ether-Type Pillar[5]arene: Enhanced Binding Ability to Bispyridinium Derivatives.
%A Wu HL
%A Zhang MY
%A Zhou T
%A Zhang LP
%A Qi QY
%A Yang GY
%A Yang B
%A Li ZT
%J Chem Asian J
%V 0
%N 0
%D 2024 Jul 2
%M 38956446
%F 4.839
%R 10.1002/asia.202400554
%X A six-cyclic crown ether-type pillar[5]arene was synthesized, and the five ethylene oxide loops were located outside the cavity and not affected by temperature changes which was confirmed by variable-temperature NMR experiment in DMSO-d6 and CDCl3 and 2D 1H-1H NOESY experiment in CDCl3. The six-cyclic pillar[5]-crown also showed greater binding ability of host-guest with bis(pyridinium) derivatives than conventional alkoxy pillar[5]arenes that illustrated through 1H NMR titration spectroscopic experiment in acetone-d6/CDCl3 (1:1) and UV-vis titration experiments in CHCl3 at room temperature. The five benzocrown ethers at the periphery were able to bind metal cations by 1H NMR titration spectroscopic experiment in CD2Cl2/methanol-d4(9:1).