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- W1969242570 abstract "Mixed-ligand complexes of nickel(II) with 2,2′-bipyridine (bipy) and 3,4-dimercaptotoluene (DMT) and with 1,10-phenanthroline (phen) and 3,4-dimercaptotoluene were prepared and characterized. These complexes give sharp 1 H nuclear magnetic resonance (NMR) spectra in dimethyl- d 6 -sulphoxide which suggests that they are diamagnetic and square planar. They show five absorption bands in the region 250 – 600 nm. One of these bands shows a bathochromic shift of about 50 nm when the solvent is changed from CH 3 OH to CHCl 3 . They also act as physical quenchers of the photo-oxidation of 2,2,6,6-tetramethyl-4-piperidinol sensitized by haemotoporphyrin IX with quenching rate constants of 6.8 × 10 9 and 1.1 × 10 10 M −1 s −1 for [Ni(bipy)(DMT)] and [Ni(phen)(DMT)] respectively. These values approach the quenching rate constant (1.1 × 10 10 M −1 s −1 of a diamagnetic square planar complex of bis(di- n -butyldithiocarbamato)nickel-(II) which is a singlet molecular oxygen quencher." @default.
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- W1969242570 date "1989-08-01" @default.
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- W1969242570 title "Mixed-ligand nickel(II) complexes of 2,2′-bipyridine and 1,10-phenanthroline with 3,4-dimercaptotoluene as quenchers of 1O2" @default.
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