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- Title
Bioinspired Supramolecular Packing Enables High Thermo‐Sustainability.
- Authors
Tao, Kai; Tang, Yiming; Rencus‐Lazar, Sigal; Yao, Yifei; Xue, Bin; Gilead, Sharon; Wei, Guanghong; Gazit, Ehud
- Abstract
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.
- Subjects
HYDROGEN bonding; PEPTIDE bonds; SEMICONDUCTORS; SUSTAINABLE development reporting; SUPRAMOLECULAR chemistry; ACTIVATION energy
- Publication
Angewandte Chemie, 2020, Vol 132, Issue 43, p19199
- ISSN
0044-8249
- Publication type
Article
- DOI
10.1002/ange.202008702