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Lookup NU author(s): Dr Osama El-ZubirORCiD, Dr Pablo Rojas Martinez, Dr Gema Dura, Lamia Al-Mahamad, Dr Thomas PopeORCiD, Professor Thomas Penfold, Dr Fabio Cucinotta, Dr Liam McGarry, Dr Ben Horrocks, Professor Andrew HoultonORCiD
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
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.
Author(s): El-Zubir O, Martinez PR, Dura G, Al-Mahamad LLG, Pope T, Penfold TJ, Mackenzie LE, Pal R, Mosely J, Cucinotta F, McGarry LF, Horrocks BR, Houlton A
Publication type: Article
Publication status: Published
Journal: Journal of Materials Chemistry C
Year: 2022
Volume: 10
Issue: 18
Pages: 7329-7335
Print publication date: 14/05/2022
Online publication date: 20/04/2022
Acceptance date: 11/04/2022
Date deposited: 21/04/2022
ISSN (print): 2050-7526
ISSN (electronic): 2050-7534
Publisher: Royal Society of Chemistry
URL: https://doi.org/10.1039/D2TC00366J
DOI: 10.1039/D2TC00366J
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