An inclusion complex of cucurbit[7]uril with benzimidazolyl benzyl viologen exhibits fluorescence and photochromic properties. Issue 42 (19th October 2022)

• Record Type: Journal Article
• Authors: Wang, Qin; Guo, Jun-Zhuo; Luo, Dan; Ye, Ming-Fu; Lin, Rui-Lian; Sun, Wen-Qi; Liu, Jing-Xin
• Is Part Of: Physical chemistry chemical physics. Volume 24:Issue 42(2022)
• Page Start: 25930
• Page End: 25936
• Publication Date: 2022-10-19
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/d2cp03516b
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : A self-assembled supramolecular inclusion complex of Q[7] with benzimidazolyl benzyl viologen exhibits interesting fluorescence emission and reversible photochromism. Abstract : In order to investigate the photochromic mechanism of photochromic materials based on supramolecular host–guest systems, we designed and synthesized a unique viologen derivative (benzimidazolyl benzyl viologen, guest 1 ·Cl3 ), which does not contain oxygen atoms. The binding interaction of guest 1 3+ with host cucurbit[7]uril (Q[7]) was investigated by various techniques. The obtained supramolecular host–guest complex 1 3+ @Q[7] exhibits interesting fluorescence emission and reversible photochromism. The ESR and XPS experimental data suggest that the photochromic process of the complex 1 3+ @Q[7] comes from the electron transfer from the carbonyl O atoms of the host Q[7] to the bipyridinium N atoms of the guest 1 3+ .