Three metal-free molecular photosensitizers (S1-S3) featuring a starburst triarylamine donor moiety have been synthesized. They show attractive photocatalytic performance in visible light-driven H production from water in their platinized TiO composites. A remarkable H turnover number (TON) of 10 200 (48 h) was achieved in an S1-anchored system.

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http://dx.doi.org/10.1021/acs.orglett.7b00042DOI Listing

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