| Autor: |
El-Zubir, Osama, Martinez, Pablo Rojas, Dura, Gema, Al-Mahamad, Lamia L.G., Pope, Thomas, Penfold, Thomas J., Mackenzie, Lewis E., Pal, Robert, Mosely, Jackie, Cucinotta, Fabio, McGarry, Liam F., Horrocks, Benjamin R., Houlton, Andrew |
| Zdroj: |
Journal of Materials Chemistry C; 5/14/2022, Vol. 10 Issue 18, p7329-7335, 7p |
| Abstrakt: |
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. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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