Print Email Facebook Twitter Harvesting the photoexcited holes on a photocatalytic proton reduction metal–organic framework Title Harvesting the photoexcited holes on a photocatalytic proton reduction metal–organic framework Author Garcia Santaclara, J. (TU Delft ChemE/Catalysis Engineering) Olivos Suarez, A.I. (TU Delft ChemE/Catalysis Engineering) du Fossé, Indy Houtepen, A.J. (TU Delft ChemE/Opto-electronic Materials) Hunger, J (Max Planck Institute) Kapteijn, F. (TU Delft ChemE/Catalysis Engineering) Gascon, Jorge (TU Delft ChemE/Catalysis Engineering) van der Veen, M.A. (TU Delft ChemE/Catalysis Engineering) Date 2017-03-14 Abstract The highly porous titanium based metal–organic framework NH2-MIL-125(Ti) has recently attracted significant attention in the field of photocatalysis as a promising material for H+ reduction. This work reveals charge transfer upon visible light illumination from this MOF to two different charge acceptors, as an alternative to sacrificial electron donors. Charge transfer is demonstrated through a combined spectroscopic study between this MOF and: (1) 2-(1H-pyrazol-3-yl)phenol, a molecule that functionally mimics the tyrosine–histidine pair, responsible for shuttling the holes to the oxygen evolving centre in natural photosynthesis, and (2) TEMPO, a well known and stable radical. Charge transfer of the holes from the MOF to these occluded molecules takes place on the picosecond time scale. This work suggests that, by coupling a stable and recyclable charge acceptor to the photogenerated holes, the charges can be utilised for oxidation reactions and, thus, link the reduction to the oxidation reactions in water splitting. To reference this document use: http://resolver.tudelft.nl/uuid:28fe7ce1-3461-478f-99b9-f18371973ba0 DOI https://doi.org/10.1039/C7FD00029D ISSN 1359-6640 Source Faraday Discussions, 71-86 Part of collection Institutional Repository Document type journal article Rights © 2017 J. Garcia Santaclara, A.I. Olivos Suarez, Indy du Fossé, A.J. Houtepen, J Hunger, F. Kapteijn, Jorge Gascon, M.A. van der Veen Files PDF c7fd00029d.pdf 882.41 KB Close viewer /islandora/object/uuid:28fe7ce1-3461-478f-99b9-f18371973ba0/datastream/OBJ/view