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NMR investigations of the interaction between the azo-dye sunset yellow and Fluorophenol
journal contribution
posted on 2023-06-08, 16:18 authored by Jonathan R Katz, Lucy J Day, Iain DayThe interaction of small molecules with larger noncovalent assemblies is important across a wide range of disciplines. Here, we apply two complementary NMR spectroscopic methods to investigate the interaction of various fluorophenol isomers with sunset yellow. This latter molecule is known to form noncovalent aggregates in isotropic solution, and form liquid crystals at high concentrations. We utilize the unique fluorine-19 nucleus of the fluorophenol as a reporter of the interactions via changes in both the observed chemical shift and diffusion coefficients. The data are interpreted in terms of the indefinite self-association model and simple modifications for the incorporation of a second species into an assembly. A change in association mode is tentatively assigned whereby the fluorophenol binds end-on with the sunset yellow aggregates at low concentration and inserts into the stacks at higher concentrations.
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Publication status
- Published
File Version
- Accepted version
Journal
Journal of Physical Chemistry BISSN
1520-6106Publisher
American Chemical SocietyExternal DOI
Issue
39Volume
117Page range
11793-11800Department affiliated with
- Chemistry Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2013-11-12First Open Access (FOA) Date
2014-08-29First Compliant Deposit (FCD) Date
2014-06-09Usage metrics
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