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Please use this identifier to cite or link to this item: http://dspace.library.iitb.ac.in/jspui/handle/10054/3758

Title: Complex series [Ru(tpy)(dpk)(X)](n+) (tpy=2,2 ': 6 ',2 ''-terpyridine; dpk=2,2 '-dipyridyl ketone; X = Cl-, CH3CN, NO2-, NO+, NO center dot, NO-): Substitution and electron transfer, structure, and spectroscopy
Authors: SARKAR, S
SARKAR, B
CHANDA, N
KAR, S
MOBIN, SM
FIEDLER, J
KAIM, W
LAHIRI, GK
Keywords: ruthenium terpyridine complexes
metal nitrosyl complexes
nitric-oxide
crystal-structure
spectroelectrochemical properties
di-2-pyridyl ketone
reversible binding
ancillary ligands
electrochemical properties
photophysical aspects
Issue Date: 2005
Publisher: AMER CHEMICAL SOC
Citation: INORGANIC CHEMISTRY, 44(17), 6092-6099
Abstract: The complex framework [Ru(tpy)(dpk)](2+) has been used to study the generation and reactivity of the nitrosyl complex [Ru(tpy)(dpk)(NO)(3+) ([4](3+)). Stepwise conversion of the chloro complex [Ru(tpy)(dpk)(Cl)](+) ([1](+)) via [Ru(tpy)(dpk)(CH3CN)](2+) ([2](2+)) and the nitro compound [Ru(tpy)(dpk)(NO2)](+) ([3](+)) yielded [4](3+); all four complexes were structurally characterized as perchlorates. Electrochemical oxidation and reduction was investigated as a function of the monodentate ligand as was the IR and UV-vis spectroscopic response (absorption/emission). The kinetics of the conversion [4](3+)/[3](+) in aqueous environment were also studied. Two-step reduction of [4](3+) was monitored via EPR, UV-vis, and IR (v(NO), v(CO)) spectroelectrochemistry to confirm the {RuNO}(7) configuration of [4](2+) and to exhibit a relatively intense band at 505 nm for [4](+), attributed to a ligand-to-ligand transition originating from bound NO-.
URI: http://dx.doi.org/10.1021/ic050533e
http://dspace.library.iitb.ac.in/xmlui/handle/10054/3758
http://hdl.handle.net/10054/3758
ISSN: 0020-1669
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