Photoinduced Water Oxidation in Chitosan Nanostructures Containing Covalently Linked Ru^II Chromophores and Encapsulated Iridium Oxide Nanoparticles.

ABSTRACT: The luminophore Ru(bpy)₂ (dcbpy)²⁺ (bpy=2,2'-bipyridine; dcbpy=4,4'-dicarboxy-2,2'-bipyridine) is covalently linked to a chitosan polymer; crosslinking by tripolyphosphate produced Ru-decorated chitosan fibers (NS-RuCh), with a 20 : 1 ratio between chitosan repeating units and Ru^II chromophores. The properties of the Ru^II compound are unperturbed by the chitosan structure, with NS-RuCh exhibiting the typical metal-to-ligand charge-transfer (MLCT) absorption and emission bands of Ru^II complexes. When crosslinks are made in the presence of IrO₂ nanoparticles, such species are encapsulated within the nanofibers, thus generating the IrO₂ ⊂NS-RuCh system, in which both Ru^II photosensitizers and IrO₂

SUBMITTER: La Ganga G 

PROVIDER: S-EPMC9291156 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature