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Anionic Hydrogen‐Bonded Frameworks Showing Tautomerism and Colorful Luminescence for the Ultrasensitive Detection of Acetone.

Authors :
Wang, Shuaiqi
Liu, Jun
Feng, Shangwei
Wu, Junyan
Yuan, Zhen
Chen, Banglin
Ling, Qidan
Lin, Zhenghuan
Source :
Angewandte Chemie International Edition. 3/22/2024, Vol. 63 Issue 13, p1-8. 8p.
Publication Year :
2024

Abstract

Tautomers coexisting in an equilibrium system have significant potential for regulating luminescent properties because of their structural differences. However, separating and stabilizing tautomers at room temperature is a considerable challenge. In this study, it is found that hydrogen‐bonded organic frameworks (HOFs) composed of Br‐ anions can effectively separate and stabilize two proton‐transfer tautomers of triarylformamidinium bromide: namely, the nitrogen cation (BA‐N) and carbon cation (BA‐C). The BA‐N crystal consisting of a dense anionic HOF and parallelly aligned organic cations exhibits green thermally activated delayed fluorescence and red room‐temperature phosphorescence (RTP). The BA‐C crystal contains acetone molecules that induce an antiparallel arrangement of the organic cations to form a loose HOF, producing blue prompt fluorescence and green RTP. Interestingly, switching of the HOFs between BA‐N and BA‐C can be achieved through the uptake and release of acetone, thereby dynamically adjusting multiple luminescent properties. Consequently, the HOF crystals can be used for the highly sensitive and specific sensing of acetone with a detection limit of 66.74 ppm. This study not only stabilizes tautomeric luminescent materials at room temperature, but also provides a new method for constructing smart HOFs with a sensitive response to a stimulus. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
14337851
Volume :
63
Issue :
13
Database :
Academic Search Index
Journal :
Angewandte Chemie International Edition
Publication Type :
Academic Journal
Accession number :
176105198
Full Text :
https://doi.org/10.1002/anie.202400742