Draper, E. R. et al. (2020) Using small angle scattering and contrast matching to understand molecular packing in low molecular weight gels. Matter, 2(3), pp. 764-778. (doi: 10.1016/j.matt.2019.12.028)
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Abstract
It is difficult to determine exactly the molecular packing in the aggregates in low molecular weight gels. Attempts to understand the packing have been made using X-ray diffraction, but there are complications with drying and questions as to whether the crystal structures represent the packing in the gel phase. Here, we exploit contrast matching in small-angle neutron scattering experiments. By preparing selectively deuterated analogs of the same molecule, the scattering from that section of the molecule decreases compared with the hydrogenated molecule. We examine packing in the pre-gelled solutions at high pH and in the gels at low pH. The data from the final gels show a lack of specific order in the aggregates that form the gel matrix. The packing in these systems is not well ordered in the gel state and so implies that it is likely that current models and cartoons are not correct.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Dietrich, Bart and Draper, Emily and McAulay, Dr Kate and Adams, Dave |
| Authors: | Draper, E. R., Dietrich, B., McAulay, K., Brasnett, C., Abdizadeh, H., Patmanidis, I., Marrink, S. J., Su, H., Cui, H., Schweins, R., Seddon, A., and Adams, D. J. |
| College/School: | College of Science and Engineering > School of Chemistry |
| Journal Name: | Matter |
| Publisher: | Elsevier (Cell Press) |
| ISSN: | 2590-2393 |
| ISSN (Online): | 2590-2385 |
| Published Online: | 29 January 2020 |
| Copyright Holders: | Copyright © 2020 The Authors |
| First Published: | First published in Matter 2(3):764-778 |
| Publisher Policy: | Reproduced under a Creative Commons license |
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