Cornwell, Daniel J., Daubney, Oliver J. and Smith, David K. orcid.org/0000-0002-9881-2714 (2015) Photopatterned Multidomain Gels:Multi-Component Self-Assembled Hydrogels Based on Partially Self-Sorting 1,3:2,4-Dibenzylidene-d-sorbitol Derivatives. Journal of the American Chemical Society. pp. 15486-15492. ISSN 1520-5126
Abstract
We report a multicomponent self-assembling system based on 1,3:2,4-dibenzyldene-d-sorbitol (DBS) derivatives which form gels as the pH is lowered in a controlled way. The two DBS gelators are functionalized with carboxylic acids: the first in the 4-position of the aromatic rings (DBS-CO2H), the second having glycine connected through an amide bond and displaying a terminal carboxylic acid (DBS-Gly). Importantly, these two self-assembling DBS-acids have different pKa values, and as such, their self-assembly is triggered at different pHs. Slowly lowering the pH of a mixture of gelators using glucono-d-lactone (GdL) initially triggers assembly of DBS-CO2H, followed by DBS-Gly; a good degree of kinetic self-sorting is achieved. Gel formation can also be triggered in the presence of diphenyliodonium nitrate (DPIN) as a photoacid under UV irradiation. Two-step acidification of a mixture of gelators using (a) GdL and (b) DPIN assembles the two networks sequentially. By combining this approach with a mask during step b, multidomain gels are formed, in which the network based on DBS-Gly is positively patterned into a pre-existing network based on DBS-CO2H. This innovative approach yields spatially resolved multidomain multicomponent gels based on programmable low-molecular-weight gelators, with one network being positively 'written' into another.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2015, American Chemical Society. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details. |
Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Chemistry (York) The University of York |
Depositing User: | Pure (York) |
Date Deposited: | 31 Mar 2016 09:34 |
Last Modified: | 19 Mar 2025 00:06 |
Published Version: | https://doi.org/10.1021/jacs.5b09691 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1021/jacs.5b09691 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:97287 |
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