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Katarzyna Szyba Maria Cieślak Golonka Kazimierz Gasiorowski Joanna Urban 《Biometals》1992,5(3):157-161
Copper(II) chromate and dichromate complexes with 2,2'-bipyridyl and 1,10-phenathroline were tested for their mutagenic activity in the standard Ames test. All of six tested complexes exhibited markedly lower mutagenic activity than the reference compounds--potassium dichromate and sodium chromate. The blockage of Cr(VI) reduction capability in the presence of the complex Cu2+ ion and the competition between copper and chromium ions in the interaction with cellular components are discussed in the light of the results of our previous chemical study. 相似文献
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Ildemar Mayer Fábio M. Engelmann Pedro V. Oliveira Marcos N. Eberlin Koiti Araki 《Inorganica chimica acta》2005,358(9):2629-2642
The spectroscopic and electrochemical properties of two isomeric forms of the supramolecular species [μ-(H2TPyP){Ru(bpy)2Cl}4]4+ (H2TPyP = 5,10,15,20-tetra(3- or 4-pyridyl)porphyrin, bpy = 2,2′-bipyridine) have been compared and consistently interpreted with the aid of molecular orbital calculations. In these complexes, the HOMO and LUMO levels are predominantly localized in the ruthenium complexes and porphyrin ring, respectively. There is an extensive mixing of the wave functions of both components in other MOs, however, and their contributions are reflected in the spectroelectrochemical and spectroscopic behavior. For example, the electronic mixing is enough to allow the energy-transfer from the peripheral complexes to the porphyrin ring, as well as the appearance of a RuII(dπ) → H4P(pπ*) charge-transfer band at 700 nm in the bis-protonated [μ-(H4TPyP){Ru(bpy)2Cl}4]4+ species, showing the strong stabilization of the porphyrin LUMO levels. 相似文献
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Taibi Ben Hadda Mehmet Akkurt Mohamed Filali Baba Maria Daoudi Brahim Bennani Abdelali Kerbal 《Journal of enzyme inhibition and medicinal chemistry》2013,28(2):457-463
A series of nine polypyridyl-ruthenium (II) complexes (N-ligands = 2,2′-bipyridines; 2,2′-6′,2′-terpyridines, di-alkyloxy-2,2′-6,2-bipyridine-3,3′-di-carboxylates), were tested against Mycobacterium tuberculosis (MBT). The complex (11) showed remarkable activity against MBT as compared to other complexes, (1–10). The aquo ligand of complex (11), as opposed to other chloro and acetonitrile derivatives, appears to play a key role in the antitubercular potency of this new class of metal-based compounds. 相似文献
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