Abstract

We report on the development of a light harvesting architecture based on a conductive metal organic framework (MOF) photosensitizer. The Zn2TTFTB (TTFTB = tetrathiafulvalene tetrabenzoate) MOF was deposited directly onto the metal oxide TiO 2 and its structure was confirmed via pXRD and EXAFS measurements. Interfacial charge transfer dynamics were investigated using time-resolved THz spectroscopy. Sub-600 fs injection was observed for both the Zn 2 TTFTB-TiO 2 and the TTFTB ligand-sensitized analog that lacks the extended MOF architecture. Rapid injection of a photo-generated electron is accompanied by facile migration of the corresponding hole away from the interfacial region leading to much longer recombination times in the Zn 2 TTFTB-TiO 2 sample.

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