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Kartha, KK, Allampally, NK, Politi, AT, Prabhu, DD, Ouchi, H, Albuquerque, RQ, Yagai, S and Fernández, G (2018) Influence of metal coordination and light irradiation on hierarchical self-assembly processes. Chemical Science, 10 (3). pp. 752-760. ISSN 2041-6520
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Abstract
Smart light-responsive supramolecular materials have been extensively investigated in the past decade, but so far the impact of metal coordination on hierarchical supramolecular structures of light-responsive building blocks has remained nearly unexplored. Herein, we unravel the hierarchical self-assembly of a small π-conjugated azo-containing pyridyl ligand that is able to respond to UV-light and metal complexation. The ligand self-assembles in an antiparallel fashion into long twisted fibers, which are then disassembled upon photoisomerization of the azobenzene groups, resulting in shorter rigid rods with a different packing motif. Complexation of Pd(ii) ions enhances the cooperativity of the aggregation and induces a molecular rearrangement into slipped stacks with subsequent formation of long thin fibers. These are then transformed into thinner, shorter rods upon light irradiation. The observed different light-responsiveness, besides clearing up the influence of metal coordination and light irradiation in self-assembly processes, paves the way towards the design of novel supramolecular photochromic systems. © 2019 The Royal Society of Chemistry.
| Item Type: | Article |
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| Subjects: | Q Science > QD Chemistry Q Science > QH Natural history > QH301 Biology |
| Divisions: | Pharmacy & Biomolecular Sciences |
| Publisher: | Royal Society of Chemistry |
| Date Deposited: | 22 Mar 2019 12:14 |
| Last Modified: | 04 Sep 2021 09:36 |
| DOI or ID number: | 10.1039/c8sc03875a |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/10385 |
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