Premium
A Photoinduced Reversible Phase Transition in a Dipeptide Supramolecular Assembly
Author(s) -
Li Xianbao,
Fei Jinbo,
Xu Youqian,
Li Dongxiang,
Yuan Tingting,
Li Guangle,
Wang Chenlei,
Li Junbai
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201711547
Subject(s) - supramolecular chemistry , moiety , dipeptide , covalent bond , self assembly , supramolecular assembly , dynamic covalent chemistry , chemistry , materials science , photochemistry , nanotechnology , peptide , molecule , stereochemistry , organic chemistry , biochemistry
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.