| Autor: |
Osama El-Zubir, Pablo Rojas Martinez, Gema Dura, Lamia L.G. Al-Mahamad, Thomas Pope, Thomas J. Penfold, Lewis E. Mackenzie, Robert Pal, Jackie Mosely, Fabio Cucinotta, Liam F. McGarry, Benjamin R. Horrocks, Andrew Houlton |
| Jazyk: |
angličtina |
| Rok vydání: |
2022 |
| Předmět: |
|
| Zdroj: |
Journal of Materials Chemistry C, 2022, Vol.10(18) [Peer Reviewed Journal] |
| ISSN: |
2050-7526 |
| Popis: |
The aqueous equimolar reaction of Ag(I) ions with the thionucleoside enantiomer (−)6-thioguanosine, ((−)6tGH), yields a one-dimensional coordination polymer {Ag(−)tG}n, the self-assembly of which generates left-handed helical chains. The resulting helicity induces an enhanced chiro-optical response compared to the parent ligand. DFT calculations indicate that this enhancement is due to delocalisation of the excited state along the helical chains, with 7 units being required to converge the calculated CD spectra. At concentrations ≥15 mmol l−1 reactions form a sample-spanning hydrogel which shows self-repair capabilities with instantaneous recovery in which the dynamic reversibility of the coordination chains appears to play a role. The resulting gel exhibits circularly polarised luminescence (CPL) with a large dissymmetry factor of −0.07 ± 0.01 at 735 nm, a phenomenon not previously observed for this class of coordination polymer. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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