Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage

The complex [Ru(bpy)(AN)4]2+ (bpy = 2,2′-bipyridyl, AN = acetonitrile) has a Ru(II) → π*bpy MLCT band at 388 nm. Upon irradiation on this absorption band, the compound undergoes total regioselective photocleavage yielding complexes fac-[Ru(bpy)(AN)3(H2O)]2+ and trans-[Ru(bpy)(AN)2(H2O)2]2+ in two co...

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Publicado: 2008
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v47_n3_p951_Petroni
http://hdl.handle.net/20.500.12110/paper_00201669_v47_n3_p951_Petroni
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00201669_v47_n3_p951_Petroni
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spelling paper:paper_00201669_v47_n3_p951_Petroni2023-06-08T14:40:37Z Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage The complex [Ru(bpy)(AN)4]2+ (bpy = 2,2′-bipyridyl, AN = acetonitrile) has a Ru(II) → π*bpy MLCT band at 388 nm. Upon irradiation on this absorption band, the compound undergoes total regioselective photocleavage yielding complexes fac-[Ru(bpy)(AN)3(H2O)]2+ and trans-[Ru(bpy)(AN)2(H2O)2]2+ in two consecutive steps with quantum yields of 0.43 and 0.09, respectively. This behavior is a consequence of the stronger σ-donor ability of the bpy nitrogens that determines the orbital ordering and therefore the nature of the lowest lying 3d-d state responsible for the photochemistry. The two-step photoreaction, which can be followed by UV-vis and NMR spectra, provides a quantitative path to the preparation of trans-polypyridine species with potentially interesting photochemical properties. © 2008 American Chemical Society. 2008 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v47_n3_p951_Petroni http://hdl.handle.net/20.500.12110/paper_00201669_v47_n3_p951_Petroni
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The complex [Ru(bpy)(AN)4]2+ (bpy = 2,2′-bipyridyl, AN = acetonitrile) has a Ru(II) → π*bpy MLCT band at 388 nm. Upon irradiation on this absorption band, the compound undergoes total regioselective photocleavage yielding complexes fac-[Ru(bpy)(AN)3(H2O)]2+ and trans-[Ru(bpy)(AN)2(H2O)2]2+ in two consecutive steps with quantum yields of 0.43 and 0.09, respectively. This behavior is a consequence of the stronger σ-donor ability of the bpy nitrogens that determines the orbital ordering and therefore the nature of the lowest lying 3d-d state responsible for the photochemistry. The two-step photoreaction, which can be followed by UV-vis and NMR spectra, provides a quantitative path to the preparation of trans-polypyridine species with potentially interesting photochemical properties. © 2008 American Chemical Society.
title Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
spellingShingle Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
title_short Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
title_full Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
title_fullStr Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
title_full_unstemmed Ruthenium(II) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
title_sort ruthenium(ii) 2,2′-bipyridyl tetrakis acetonitrile undergoes selective axial photocleavage
publishDate 2008
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00201669_v47_n3_p951_Petroni
http://hdl.handle.net/20.500.12110/paper_00201669_v47_n3_p951_Petroni
_version_ 1768542819520086016

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