Groves, Philip, Huang, Jin, Heise, Andreas et al. (2 more authors) (2020) Molecular environment and reactivity in gels and colloidal solutions under identical conditions. Physical chemistry chemical physics. pp. 12267-12272. ISSN 1463-9084
Abstract
A PEG-Tyr block copolymer forms a kinetically stable colloidal solution in water at room temperature which undergoes an irreversible conversion to a gel phase upon heating. A micellar solution and a gel can therefore be studied under identical experimental conditions. This made it possible to compare physical properties and chemical reactivity of micelles and gels in identical chemical environments and under identical conditions. EPR spectra of the spin-labelled copolymer showed that tyrosine mobility in gels was slightly reduced compared to micelles. Chemical reactivity was studied using photochemical degradation of tyrosine and tyrosine dimerization, in the absence and in the presence of an Fe(iii) salt. The reactivity trends were explained by reduced tyrosine mobility in the gel environment. The largest reactivity difference in gels and micelles was observed for bimolecular dityrosine formation which was also attributed to the reduction in molecular mobility.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © the Owner Societies 2020 |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) |
Depositing User: | Pure (York) |
Date Deposited: | 18 Jun 2020 14:40 |
Last Modified: | 09 Jan 2025 00:08 |
Published Version: | https://doi.org/10.1039/d0cp01956a |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1039/d0cp01956a |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:162076 |
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Description: Molecular environment and reactivity in gels and colloidal solutions under identical conditions
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