Photophysics of mixed ligand complexes of ruthenium(II) with 2,2′-bipyridyl and phosphines

Autor:	T. V. Mezentseva, S. V. Litke, A. S. Litke, A. Yu. Ershov, G. N. Lyalin
Rok vydání:	2000
Předmět:	Chemistry Hydrogen bond chemistry.chemical_element Quantum yield Medicinal chemistry Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Ruthenium chemistry.chemical_compound Reaction rate constant Excited state Nitro Luminescence Phosphine
Zdroj:	Optics and Spectroscopy. 89:847-853
ISSN:	1562-6911 0030-400X
DOI:	10.1134/1.1335032
Popis:	Luminescence of mixed ligand complexes of ruthenium(II) of the types cis-Ru(bpy)2X2(I), cis-[Ru(bpy)2(PPh3)X](BF4)(II), and cis-Ru(bpy)(PP)X2(III) (X = CN, NO2, PPh3 is triphenyl phosphine; PP is 1,2-bis(diphenylphospino)ethane (dppe) and cis-,2-bis(diphenylphosphino)ethylene (dppene)) is studied in alcohol matrices (EtOH/MeOH, 4:1) frozen at 77 K. A sequence of complexes I–III exhibits an additive (in the number of phosphorous atoms) blue shift of the absorption and luminescence bands and an increase in the quantum yield of luminescence and in the excited-state lifetime. The rate constant of nonradiative deactivation of the excited state decreases more than by an order of magnitude in the sequence I–III of cyano complexes and only by three times in a sequence of nitro complexes. This is assumed to be caused by a specific (in the hydrogen bond type) interaction of nitro groups of complexes with a proton solvent.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::8ad87d32ef31d8632ae206d3c2b24412 https://doi.org/10.1134/1.1335032 Zobrazit plný text záznamu Plný text ve formátu PDF