A Photoinduced Reversible Phase Transition in a Dipeptide Supramolecular Assembly. (16th January 2018)

• Record Type: Journal Article
• Authors: Li, Xianbao; Fei, Jinbo; Xu, Youqian; Li, Dongxiang; Yuan, Tingting; Li, Guangle; Wang, Chenlei; Li, Junbai
• Is Part Of: Angewandte Chemie. Volume 130:Number 7(2018)
• Page Start: 1921
• Page End: 1925
• Publication Date: 2018-01-16
• Subjects: Dipeptide -- Phasenübergänge -- Photosäuren -- Photoschalter -- Supramolekulare Aggregate; Chemistry -- Periodicals; 540
• DOI: 10.1002/ange.201711547
• Languages: English
• ISSNs: 0044-8249

Abstract

Abstract: Tunable supramolecular assembly has found various applications in biomedicine, molecular catalysis, optoelectronics, and nanofabrication. Unlike traditional covalent conjugation, non‐covalent introduction of a photoswitchable moiety enables reversible photomodulation of non‐photosensitive dipeptide supramolecular assembly. Under light illumination, a long‐lived photoacid generator releases a proton and mediates the dissociation of dipeptide‐based organogel, thereby resulting in sol formation. Under darkness, the photoswitchable moiety entraps a proton, resulting in gel regeneration. Furthermore, accompanying the isothermal recycled gel–sol transition in a spatially controlled manner, renewable patterns are spontaneously fabricated. This new concept of light‐controlled phase transition of amino acid‐based supramolecular assemblies will open up the possibility of wide applications.