Fabricating a novel supramolecular light-activated platform based on internal-driven forces induced by the UV-light

• Published in: Chinese chemical letters Vol. 33; no. 12; pp. 5065 - 5068
• Main Authors: Qi, Xiaoni, Li, Weichun, Shi, Bingbing, Zhang, Youming, Yao, Hong, Lin, Qi, Wei, Taibao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.12.2022; Key Laboratory of Eco-Environmental Polymer Materials of Gansu Province,College of Chemistry and Chemical Engineering,Northwest Normal University,Lanzhou 730070,China
• Subjects: Internal-driven forces; Light-activated platform; Phenazine derivatives; Pillararene; UV-light; Phenazine derivatives; UV-light; Light-activated platform; Internal-driven forces; Pillararene
• ISSN: 1001-8417; 1878-5964
• DOI: 10.1016/j.cclet.2022.03.081

Recently, exploiting a novel supramolecular fabrication pathway have drawn great attention. To this endeavor, we firstly designed and reported an original light-activated platform based on the internal-driven forces of macrocyclic host by hiring the pillar[5]arene as the host molecule (H) and phenazine derivatives acting as an energetic guest molecule (G). Surprisingly, after adding the H solution into G system, the intensive fluorescence emission of the G molecule rapidly decreased under the irradiation of the UV-light (254 nm) until absolutely quenching. Delightfully, different from the traditional supramolecular host-guest interaction, the fluorescent emission of G molecule could be recovered after irradiating under the nature light. In view of this interesting observations, the interaction mechanism was carefully investigated by a series of characterizations. Those results suggested that the G molecule was easily threaded into the macrocyclic cavity (H) under the internal-driven forces induced by the UV-light irradiation, forming a 1:1 host-guest complex. Moreover, taking advantage of this especial feature, the light-activated platform of host–guest complex was further applied for ink-free light-driven printing materials, exhibiting great potential in the real application. We fabricated a novel supramolecular light-activated platform based on the internal-driven forces induced by the UV-light. [Display omitted]