Ruthenium complexes of the general formula [Ru(CO)(H)(L2)(L'2)][PF6] (L2 = trans-2PPh3, L' = η2-4,4'-dicarboxybipyridine (1); L2 =trans-2Ph2PCH2CH2COOH, L'2 = bipyridine (2); L2 = Ph2PCHCHPPh2, L' = η2-5-amino-1,10-phenanthroline (3); L2 = trans-2PPh3, L'2 = η2-4-carboxaldehyde-4'-methylbipyridine (4)) have been shown to have longer emission lifetimes and higher quantum yields in solution compa...

A series of nickel complexes supported with a tripodal ligand bis(1-methylbenzimidazolyl-2-methyl)amine (L) or bis(1-methylbenzimidazolyl-2-methyl)-10-camphorsulfonamide (L') on a Ni(II) ion were synthesized and fully characterized. The complexes, [LNiCl(micro-Cl)]2.4CH(3)OH (1), [LNi(CH(3)CN)3](ClO4)2.2CH(3)CN (3), and [L2(2)Ni(2)(micro-OAc)3]X (X = Cl- (5) or ClO4- (7)), coordinated with the ...

Four dimeric nickel(II) complexes [Ni2Cl2(BnC2S)2] [1], [Ni2Cl2(BnC3S)2] [2], [Ni2(PyC2S)2]Br2 [3]Br2, and [Ni2(PyC3S)2]Br2 [4]Br2 of four different thiolate-functionalized N-heterocyclic carbene (NHC) ligands were synthesized, and their structures have been determined by single-crystal X-ray crystallography. The four ligands differ by the alkyl chain length between the thiolate group and the b...

A series of N-(2,2-dimethyl-1-(quinolin-2-yl)propylidene) arylamines was sophisticatedly synthesized and reacted with nickel(II) bromine for the formation of the corresponding nickel complexes. All the organic compounds were characterized by IR, NMR spectra and elemental analysis, while all the nickel complexes were characterized by IR spectra and elemental analysis. On activation with ethylalu...

Cungen Zhang, Christoph Janiak, and Horst Brombacher Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, D-79104 Freiburg Reprint requests to Prof. Dr. C. Janiak. Fax: +49 (0)761 203 6147. E-mail: [email protected] Z. Naturforsch. 56b, 1205-1208 (2001); received July 20, 2001 Nickel Complexes, ^-Stacking, Hydrogen Bonding The molecular nickel complexes fr...

Nickel has been shown to be an essential trace element involved in the metabolism of several species of bacteria, archea, and plants. In these organisms, nickel is involved in enzymes that catalyze both non-redox (e.g., urease, glyoxalase I) and redox (e.g., hydrogenase, carbon monoxide dehydrogenase, superoxide dismutase) reactions, and proteins involved in the transport, storage, metallocente...

Electrochemiluminescence (ECL) of a series of ruthenium(II) diimine complexes with appended crown ethers derived from 1,10-phenanthroline was studied via either the annihilation route or the coreactant schemes, and the ECL efficiency has been determined. The effect of an FSN surfactant on the ECL properties was also studied in buffer solutions. The effect of cation binding on the ECL behavior w...