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00925njm 22002777a 4500 dc Rabbani, Ramin author Saeedi, Sima author Nazimuddin, Md author Barbero San Juan, Héctor author Kyritsakas, Nathalie author White, Travis A. author Masson, Eric author 2021 A cucurbit[8]uril (CB[8])-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 cucurbit[7]uril-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[8] secures the Pt(II)–Pt(II) dimer in a particularly reactive conformation that promotes hydrogen formation. Chem. Sci., 2021, 12, 15347 2041-6520 https://uvadoc.uva.es/handle/10324/65371 10.1039/d1sc03743a 15347 46 15352 Chemical Science 12 2041-6539 Enhanced photoreduction of water catalyzed by a cucurbit[8]uril-secured platinum dimer