Abstract
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
Original language | English |
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Pages (from-to) | 7329-7335 |
Number of pages | 6 |
Journal | Journal of Materials Chemistry C |
Volume | 18 |
Early online date | 20 Apr 2022 |
DOIs | |
Publication status | Published - 14 May 2022 |