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Article: Vibrational and electronic spectra of [Pt2(SO4)]2- complexes

TitleVibrational and electronic spectra of [Pt2(SO4)]2- complexes
Authors
Issue Date1991
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/ic
Citation
Inorganic Chemistry, 1991, v. 30 n. 24, p. 4647-4654 How to Cite?
AbstractThe vibrational and electronic spectra of axially ligated sulfate-bridged binuclear platinum complexes ([Pt2(SO4)4L2]n-: L = OH2, DMSO, n = 2; L = Cl, Br, n = 4) have been studied. Raman spectra acquired with near-UV excitation show bands assigned to Pt-O(sulfate) stretching (300-350-cm-1 region) for all complexes, while bands assigned to Pt-Pt and Pt-L stretching are seen for complexes (L = Cl, Br) that display preresonance Raman scattering within intense near-UV absorption bands assigned to the σ(L) → σ*(Pt2) electronic transition. Weaker electronic absorptions are assigned as metal-metal 1(σ→σ*) (near 220 nm for L = OH2, Cl) and dπ → dσ*(Pt2) (350-500 nm). Single-crystal polarized absorption spectra (L = OH2, DMSO) show that the weak absorption system in the 350-500-nm region consists of three x,y-polarized (metal-metal axis) bands and an x,y-polarized band. The L = OH2, Cl complexes show weak emission bands in the 695-750-nm region when excited at 77 K with near-UV light. These emission bands are similar to those observed for [Pt2(HPO4)4L2]n- (L = OH2, n = 2; L = Cl, n = 4) complexes. The emission lifetimes for the sulfate-bridged complexes (450 ± 50 ns, L = OH2; 290 ± 20 ns, L = Cl) are much shorter, and the emission intensities are much weaker, than the corresponding properties of the phosphate-bridged complexes. © 1991 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/167963
ISSN
2015 Impact Factor: 4.82
2015 SCImago Journal Rankings: 1.873
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorNewman, RAen_US
dc.contributor.authorMartin, DSen_US
dc.contributor.authorDallinger, RFen_US
dc.contributor.authorWoodruff, WHen_US
dc.contributor.authorStiegman, AEen_US
dc.contributor.authorChe, CMen_US
dc.contributor.authorSchaefer, WPen_US
dc.contributor.authorMiskowski, VMen_US
dc.contributor.authorGray, HBen_US
dc.date.accessioned2012-10-08T03:13:29Z-
dc.date.available2012-10-08T03:13:29Z-
dc.date.issued1991en_US
dc.identifier.citationInorganic Chemistry, 1991, v. 30 n. 24, p. 4647-4654en_US
dc.identifier.issn0020-1669en_US
dc.identifier.urihttp://hdl.handle.net/10722/167963-
dc.description.abstractThe vibrational and electronic spectra of axially ligated sulfate-bridged binuclear platinum complexes ([Pt2(SO4)4L2]n-: L = OH2, DMSO, n = 2; L = Cl, Br, n = 4) have been studied. Raman spectra acquired with near-UV excitation show bands assigned to Pt-O(sulfate) stretching (300-350-cm-1 region) for all complexes, while bands assigned to Pt-Pt and Pt-L stretching are seen for complexes (L = Cl, Br) that display preresonance Raman scattering within intense near-UV absorption bands assigned to the σ(L) → σ*(Pt2) electronic transition. Weaker electronic absorptions are assigned as metal-metal 1(σ→σ*) (near 220 nm for L = OH2, Cl) and dπ → dσ*(Pt2) (350-500 nm). Single-crystal polarized absorption spectra (L = OH2, DMSO) show that the weak absorption system in the 350-500-nm region consists of three x,y-polarized (metal-metal axis) bands and an x,y-polarized band. The L = OH2, Cl complexes show weak emission bands in the 695-750-nm region when excited at 77 K with near-UV light. These emission bands are similar to those observed for [Pt2(HPO4)4L2]n- (L = OH2, n = 2; L = Cl, n = 4) complexes. The emission lifetimes for the sulfate-bridged complexes (450 ± 50 ns, L = OH2; 290 ± 20 ns, L = Cl) are much shorter, and the emission intensities are much weaker, than the corresponding properties of the phosphate-bridged complexes. © 1991 American Chemical Society.en_US
dc.languageengen_US
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/icen_US
dc.relation.ispartofInorganic Chemistryen_US
dc.titleVibrational and electronic spectra of [Pt2(SO4)]2- complexesen_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/ic00024a037-
dc.identifier.scopuseid_2-s2.0-2742595278en_US
dc.identifier.volume30en_US
dc.identifier.issue24en_US
dc.identifier.spage4647en_US
dc.identifier.epage4654en_US
dc.identifier.isiWOS:A1991GR81300037-
dc.publisher.placeUnited Statesen_US
dc.identifier.scopusauthoridNewman, RA=7401856347en_US
dc.identifier.scopusauthoridMartin, DS=8442220800en_US
dc.identifier.scopusauthoridDallinger, RF=7003857419en_US
dc.identifier.scopusauthoridWoodruff, WH=7005570753en_US
dc.identifier.scopusauthoridStiegman, AE=6603743321en_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridSchaefer, WP=7103192229en_US
dc.identifier.scopusauthoridMiskowski, VM=6603008214en_US
dc.identifier.scopusauthoridGray, HB=36047602600en_US

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