Nickel Complex with Internal Bases as Efficient Molecular Catalyst for Photochemical H-2 Production
2014 (English)In: ChemSusChem, ISSN 1864-5631, E-ISSN 1864-564X, Vol. 7, no 10, 2889-2897 p.Article in journal (Refereed) Published
A Ni complex with internal bases that contain bipyridine-derived ligands, [Ni(L)(2)(H2O)(2)](BF4)(2) ((BF4)(2), L=2-(2-pyridyl)-1,8-naphthyridine), and a reference complex that bears analogous bipyridine-derived ligands but without an internal base, [Ni(L)(3)](BF4)(2) ((BF4)(2), L=2-(2-pyridyl)quinoline), were synthesized and characterized. The electrochemical properties of these complexes were studied in CH3CN, H2O, and a mixture of EtOH/H2O. The fluorescence spectroscopic studies suggest that both dynamic and the sphere-of-action static quenching exist in the fluorescein Fl(2-)/(2+) and Fl(2-)/(2+) systems. These noble-metal-free molecular systems were studied for photocatalytic H-2 generation. Under optimal conditions, the turnover number of H-2 evolution reaches 3230 based on (2+), whereas (2+) displays only approximately one third of the turnover of (2+). A plausible mechanism for the catalytic H-2 generation by (2+) is presented based on DFT calculations.
Place, publisher, year, edition, pages
2014. Vol. 7, no 10, 2889-2897 p.
density functional calculations, hydrogen, nickel, photochemistry, water splitting
Other Chemistry Topics
IdentifiersURN: urn:nbn:se:kth:diva-155466DOI: 10.1002/cssc.201402381ISI: 000342815400018ScopusID: 2-s2.0-84925257946OAI: oai:DiVA.org:kth-155466DiVA: diva2:762843
FunderSwedish Research CouncilKnut and Alice Wallenberg Foundation
QC 201411132014-11-132014-11-062015-12-07Bibliographically approved