Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study
Amorphous potassium pentacyanonitrosylruthenate (II) was synthesized and characterized by UV, IR, X-ray diffraction and thermogravimetric analysis. Electron Spin Resonance spectroscopy reveals the presence of paramagnetic ruthenate (I) complexes and NO2 radicals in the X-irradiated diamagnetic salt....
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2000-01-01
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doaj-a032eda1e1d149298ae33b9a7d903f7d2020-11-24T22:57:38ZengSociedade Brasileira de QuímicaJournal of the Brazilian Chemical Society0103-50532000-01-01113257260Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance studyVugman Ney V.Pinhal Nelson M.Santos Cristina M. P. dosFaria Roberto B.Amorim Hélio S. deAmorphous potassium pentacyanonitrosylruthenate (II) was synthesized and characterized by UV, IR, X-ray diffraction and thermogravimetric analysis. Electron Spin Resonance spectroscopy reveals the presence of paramagnetic ruthenate (I) complexes and NO2 radicals in the X-irradiated diamagnetic salt. Spin-hamiltonian parameters of the [Ru(CN)5NO]3- complex (g<FONT FACE="Symbol">^</FONT > or = 2.0064, A<FONT FACE="Symbol">^</FONT> (14N) = 60.7 MHz, g|| = 1.999, A|| (14N) = 77.3 MHz ) support an electron capture in a pi* molecular orbital of the nitrosyl group mixed with d xz and d yz ruthenium orbitals as recently predicted by theoretical calculations. Silver ions, present as impurities, are reduced to Ag(0) by X-irradiation and coordinate to four magnetically equivalent nitrogens in a distorted site, giving rise to a well resolved anisotropic ESR powder spectrum.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300010pentacyanonitrosylruthenateESRradiation damage |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Vugman Ney V. Pinhal Nelson M. Santos Cristina M. P. dos Faria Roberto B. Amorim Hélio S. de |
spellingShingle |
Vugman Ney V. Pinhal Nelson M. Santos Cristina M. P. dos Faria Roberto B. Amorim Hélio S. de Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study Journal of the Brazilian Chemical Society pentacyanonitrosylruthenate ESR radiation damage |
author_facet |
Vugman Ney V. Pinhal Nelson M. Santos Cristina M. P. dos Faria Roberto B. Amorim Hélio S. de |
author_sort |
Vugman Ney V. |
title |
Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study |
title_short |
Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study |
title_full |
Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study |
title_fullStr |
Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study |
title_full_unstemmed |
Effect of ionising radiation on potassium pentacyanonitrosylruthenate(II): an Electron Spin Resonance study |
title_sort |
effect of ionising radiation on potassium pentacyanonitrosylruthenate(ii): an electron spin resonance study |
publisher |
Sociedade Brasileira de Química |
series |
Journal of the Brazilian Chemical Society |
issn |
0103-5053 |
publishDate |
2000-01-01 |
description |
Amorphous potassium pentacyanonitrosylruthenate (II) was synthesized and characterized by UV, IR, X-ray diffraction and thermogravimetric analysis. Electron Spin Resonance spectroscopy reveals the presence of paramagnetic ruthenate (I) complexes and NO2 radicals in the X-irradiated diamagnetic salt. Spin-hamiltonian parameters of the [Ru(CN)5NO]3- complex (g<FONT FACE="Symbol">^</FONT > or = 2.0064, A<FONT FACE="Symbol">^</FONT> (14N) = 60.7 MHz, g|| = 1.999, A|| (14N) = 77.3 MHz ) support an electron capture in a pi* molecular orbital of the nitrosyl group mixed with d xz and d yz ruthenium orbitals as recently predicted by theoretical calculations. Silver ions, present as impurities, are reduced to Ag(0) by X-irradiation and coordinate to four magnetically equivalent nitrogens in a distorted site, giving rise to a well resolved anisotropic ESR powder spectrum. |
topic |
pentacyanonitrosylruthenate ESR radiation damage |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532000000300010 |
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