Gas-Induced Phase Transition of Dipeptide Supramolecular Assembly  

作　　者：Huimin Xue Jinbo Fei Aoli Wu Xia Xu Junbai Li 

机构地区：[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 100190 [2]University of Chinese Academy of Sciences,Beijing 100049

出　　处：《CCS Chemistry》2021年第11期8-16,共9页中国化学会会刊（英文）

基　　金：The authors gratefully acknowledge the financial support for this research from the National Nature Science Foundation of China(nos.21961142022,21872150,and 22072160);J.F.particularly thanks to the Youth Innovation Promotion Association of CAS(no.2016032);Institute of Chemistry,CAS(no.Y6290512B1).

摘　　要：The manipulation of supramolecular assembly enables single-component architectures to possess diverse structures and functions.Here,we report directed phase transitions of dipeptide supramolecular gel to crystals with excellent selectivity and tunable mechanical properties.To be specific,lamellar-to-orthorhombic rearrangement of dipeptide molecules in the supramolecular assembly was guided by application of ammonia gas,while lamellar-tohexagonal realignment was generated upon water vapor exposure of the assembly.Importantly,this crystal phase control originated from distinct gas-mediated reconstitution of hydrogen-bonding interactions,which endowed the dipeptide materials with remarkably modulated stiffness.The selective phase transformation offers a simple and effective platform for self-assembling peptide crystals with diverse long-range-ordered structures from a single gel-state aggregation.This work opens up new perspectives on peptide-based biomaterials via gas-directed hydrogen-bonding chemistry.

关 键 词：supramolecular assembly PEPTIDE GEL CRYSTAL phase transition 

分 类 号：TB33[一般工业技术—材料科学与工程]