Perylene-Based Covalent Organic Frameworks for Acid Vapor Sensing.
Authors
Ascherl, Laura
Evans, Emrys
Orsborne, Sarah
Bessinger, Derya
Bein, Thomas
Publication Date
2019-10-02Journal Title
Journal of the American Chemical Society
ISSN
0002-7863
Publisher
American Chemical Society
Volume
141
Issue
39
Pages
15693-15699
Language
eng
Type
Article
This Version
AM
Metadata
Show full item recordCitation
Ascherl, L., Evans, E., Gorman, J., Orsborne, S., Bessinger, D., Bein, T., Friend, R., & et al. (2019). Perylene-Based Covalent Organic Frameworks for Acid Vapor Sensing.. Journal of the American Chemical Society, 141 (39), 15693-15699. https://doi.org/10.1021/jacs.9b08079
Abstract
Traditionally, the properties and functions of covalent organic frameworks (COFs) are defined by their constituting building blocks, while the chemical bonds that connect the individual subunits have not attracted much attention as functional components of the final material. We have developed a new series of dual-pore perylene-based COFs and demonstrated that their imine bonds can be protonated reversibly, causing significant protonation-induced color shifts toward the near-infrared, while the structure and crystallinity of the frameworks are fully retained. Thin films of these COFs are highly sensitive colorimetric acid vapor sensors with a detection limit as low as 35 μg L-1 and a response range of at least 4 orders of magnitude. Since the acidochromism in our COFs is a cooperative phenomenon based on electronically coupled imines, the COFs can be used to determine simultaneously the concentration and protonation strength of nonaqueous acid solutions, in which pH electrodes are not applicable, and to distinguish between different acids. Including the imine bonds as function-determining constituents of the framework provides an additional handle for constructing multifunctional COFs and extending the range of their possible applications.
Sponsorship
ECH2020 EUROPEAN RESEARCH COUNCIL (ERC) (670405)
Identifiers
External DOI: https://doi.org/10.1021/jacs.9b08079
This record's URL: https://www.repository.cam.ac.uk/handle/1810/300171
Rights
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