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Bioinspired Supramolecular Packing Enables High Thermo‐Sustainability
Author(s) -
Tao Kai,
Tang Yiming,
RencusLazar Sigal,
Yao Yifei,
Xue Bin,
Gilead Sharon,
Wei Guanghong,
Gazit Ehud
Publication year - 2020
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.202008702
Subject(s) - supramolecular chemistry , thermal stability , hydrogen bond , materials science , semiconductor , quenching (fluorescence) , nanotechnology , chemical physics , thermal conductivity , molecule , chemistry , optoelectronics , organic chemistry , physics , fluorescence , quantum mechanics , composite material
Bottom‐up self‐assembled bioinspired materials have attracted increasing interest in a variety fields. The use of peptide supramolecular semiconductors for optoelectronic applications is especially intriguing. However, the characteristic thermal unsustainability limits their practical application. Here, we report the thermal sustainability of cyclo‐ditryptophan assemblies up to 680 K. Non‐covalent interactions underlie the stability mechanism, generating a low exciton‐binding energy of only 0.29 eV and a high thermal‐quenching‐activation energy of up to 0.11 eV. The contributing forces comprise predominantly of aromatic interactions, followed by hydrogen bonding between peptide molecules, and, to a lesser extent, water‐mediated associations. This thermal sustainability results in a temperature‐dependent conductivity of the supramolecular semiconductors, showing 93 % reduction of the resistance from 320 K to 440 K. Our results establish thermo‐sustainable peptide self‐assembly for heat‐sensitive applications.