Circularly polarised luminescence in an RNA-based homochiral, self-repairing, coordination polymer hydrogel.
J Mater Chem C Mater
; 10(18): 7329-7335, 2022 May 12.
Article
em En
| MEDLINE
| ID: mdl-35706420
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.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
J Mater Chem C Mater
Ano de publicação:
2022
Tipo de documento:
Article