A Photoinduced Reversible Phase Transition in a Dipeptide Supramolecular Assembly |
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| Authors: | Xianbao Li Dr Jinbo Fei Youqian Xu Prof?Dr Dongxiang Li Tingting Yuan Guangle Li Chenlei Wang Prof?Dr Junbai Li |
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| Affiliation: | 1. Beijing National Laboratory for Molecular Sciences (BNLMS), CAS Key Lab of Colloid, Interface and Chemical Thermodynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing, China;2. University of Chinese Academy of Sciences, Beijing, China;3. College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, China |
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| 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. |
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| Keywords: | dipeptides phase transition photoacid generators photoswitches supermolecular assembly |
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