Enhanced photoreduction of water catalyzed by a cucurbituril-secured platinum dimer
A cucurbituril (CB)-secured platinum terpyridyl chloride dimer was used as a photosensitizer and hydrogen-evolving catalyst for the photoreduction of water. Volumes of produced hydrogen were up to 25 and 6 times larger than those obtained with the corresponding free and cucurbituril-bound platinum monomer, respectively, at equal Pt concentration. The thermodynamics of the proton-coupled electron transfer from the Pt(ii)-Pt(ii) dimer to the corresponding Pt(ii)-Pt(iii)-H hydride key intermediate, as quantified by density functional theory, suggest that CB secures the Pt(ii)-Pt(ii) dimer in a particularly reactive conformation that promotes hydrogen formation.
Rabbani, Ramin; Saeedi, Sima; Nazimuddin, Md; Barbero, Héctor; Kyritsakas, Nathalie; White, Travis A.; and Masson, Eric, "Enhanced photoreduction of water catalyzed by a cucurbituril-secured platinum dimer" (2021). Chemistry & Biochemistry Open Access Publications. 34.