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Histidine Proton Shuttle-Initiated Switchable Inversion of Circularly Polarized Luminescence.

Histidine Proton Shuttle-Initiated Switchable Inversion of Circularly Polarized Luminescence.

Authors :
Niu D
Ji L
Ouyang G
Liu M
Source :
ACS applied materials & interfaces [ACS Appl Mater Interfaces] 2020 Apr 15; Vol. 12 (15), pp. 18148-18156. Date of Electronic Publication: 2020 Apr 01.
Publication Year :
2020

Abstract

Switchable inversion of the sign of circularly polarized luminescence (CPL) in chiral supramolecular systems has gained remarkable interest because of its role in understanding the chirality-switching phenomena in biological systems and developing smart chiral luminescent materials. Herein, inspired by the histidine proton shuttle in natural enzymes, we synthesized a histidine π-gel (PyC <subscript>3</subscript> H) and realized reversible inversion of supramolecular chirality and CPL by receiving and then transferring a proton. It was found that in the course of histidine protonation by adding an external proton source, the transcription of intrinsic molecular chirality of PyC <subscript>3</subscript> H to the supramolecular level biased, achieving dynamic control over the PyC <subscript>3</subscript> H gel with left-handed CPL inversed into the right-handed one. The mechanism study revealed that the supramolecular chirality and CPL inversion are mainly affected by the cooperation adjustment of hydrogen bonds and π-π stacking upon histidine protonation and deprotonation, which causes the re-orientations of pyrene chromophores. This work sets up an alternative effective method to fabricate tunable CPL-active materials while using the same chiral small molecules, which provides a new insight into developing bio-inspired switchable supramolecular materials.

Details

Language :
English
ISSN :
1944-8252
Volume :
12
Issue :
15
Database :
MEDLINE
Journal :
ACS applied materials & interfaces
Publication Type :
Academic Journal
Accession number :
32200624
Full Text :
https://doi.org/10.1021/acsami.0c02080