Ni(II) complexes of tripodal N4 ligands as catalysts for alkane hydroxylation and O-arylation of phenol: Structural and reactivity effects induced by fluoro substitution
paramagnetic NMR), elemental analysis, electrochemistry and X-ray diffraction techniques. In structurally similar complexes 1 and 2, Ni(II) center has a distorted octahedral coordination geometry constituted by all the four N atoms of the ligands, one acetate group and a water molecule. Complex 3 has different structuralaspects. It does not have the water molecule in the coordination sphere and contains one acetate
A Water-Soluble Copper-Polypyridine Complex as a Homogeneous Catalyst for both Photo-Induced and Electrocatalytic O<sub>2</sub>
Evolution
作者:Rui-Juan Xiang、Hong-Yan Wang、Zhi-Juan Xin、Cheng-Bo Li、Ya-Xing Lu、Xue-Wang Gao、Hua-Ming Sun、Rui Cao
DOI:10.1002/chem.201504066
日期:2016.1.26
The water‐soluble polypyridine copper complex [Cu(F3TPA)(ClO4)2] [1; F3TPA=tris(2‐fluoro‐6‐pyridylmethyl)amine] catalyzes wateroxidation in a pH 8.5 boratebuffer at a relatively low overpotential of 610 mV. Assisted by photosensitizer and an electron acceptor, 1 also exhibits activity as a homogeneous catalyst for photo‐induced O2 evolution with a maximum turnover frequency (TOF) of (1.58±0.03)×10−1 s−1
increased reactivity is observed upon ligand substitution. In CH2Cl2, conductimetry measurements indicate extremely weak (if any!) dissociation of the ancillary ligands in all complexes. Comparative analysis of the structures reveals relatively invariant structural parameters within the series of Fe(SO3CF3)2 complexes, whereas FeCl2 complexes display important metal to ligand elongations upon tripod substitution