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Article: Spectroscopy and redox properties of the luminescent excited state of [Au2(dppm)2]2+ (dppm = Ph2PCH2PPh2)

TitleSpectroscopy and redox properties of the luminescent excited state of [Au2(dppm)2]2+ (dppm = Ph2PCH2PPh2)
Authors
Issue Date1990
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
Citation
Journal Of The Chemical Society, Dalton Transactions, 1990 n. 11, p. 3215-3219 How to Cite?
AbstractThe electronic absorption spectrum of [Au2(dppm)2]2+ [dppm = bis(diphenylphosphino)methane] in acetonitrile exhibits an absorption band at 290 nm, attributable to a pσ ← dσ* transition. A much weaker band in the region 300-370 nm is assigned to a pσ ← dδ* transition. Excitation of [Au2(dppm)2]2+ in degassed acetonitrile at 310-390 nm at room temperature results in phosphorescence centred at 575 nm, which is most likely to be derived from the 3B1u [(dδ*)1(pσ)1] state. The phosphorescence of [Au2(dppm)2]2+* is found to be quenched by a number of electron acceptors and donors, as well as energy-transfer acceptors. The powerful reducing nature of [Au2(dppm)2]2+* is revealed by its excited-state redox potential E°[Au2(dppm)2 3+/2+*] of -1.6(1) V vs. a saturated sodium chloride calomel electrode (s.s.c.e.) which was determined through studies of quenching by a series of pyridinium acceptors.
Persistent Identifierhttp://hdl.handle.net/10722/167956
ISSN
2002 Impact Factor: 3.023
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorChe, CMen_US
dc.contributor.authorKwong, HLen_US
dc.contributor.authorPoon, CKen_US
dc.contributor.authorYam, VWWen_US
dc.date.accessioned2012-10-08T03:13:23Z-
dc.date.available2012-10-08T03:13:23Z-
dc.date.issued1990en_US
dc.identifier.citationJournal Of The Chemical Society, Dalton Transactions, 1990 n. 11, p. 3215-3219en_US
dc.identifier.issn1472-7773en_US
dc.identifier.urihttp://hdl.handle.net/10722/167956-
dc.description.abstractThe electronic absorption spectrum of [Au2(dppm)2]2+ [dppm = bis(diphenylphosphino)methane] in acetonitrile exhibits an absorption band at 290 nm, attributable to a pσ ← dσ* transition. A much weaker band in the region 300-370 nm is assigned to a pσ ← dδ* transition. Excitation of [Au2(dppm)2]2+ in degassed acetonitrile at 310-390 nm at room temperature results in phosphorescence centred at 575 nm, which is most likely to be derived from the 3B1u [(dδ*)1(pσ)1] state. The phosphorescence of [Au2(dppm)2]2+* is found to be quenched by a number of electron acceptors and donors, as well as energy-transfer acceptors. The powerful reducing nature of [Au2(dppm)2]2+* is revealed by its excited-state redox potential E°[Au2(dppm)2 3+/2+*] of -1.6(1) V vs. a saturated sodium chloride calomel electrode (s.s.c.e.) which was determined through studies of quenching by a series of pyridinium acceptors.en_US
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_US
dc.relation.ispartofJournal of the Chemical Society, Dalton Transactionsen_US
dc.titleSpectroscopy and redox properties of the luminescent excited state of [Au2(dppm)2]2+ (dppm = Ph2PCH2PPh2)en_US
dc.typeArticleen_US
dc.identifier.emailChe, CM:cmche@hku.hken_US
dc.identifier.emailYam, VWW:wwyam@hku.hken_US
dc.identifier.authorityChe, CM=rp00670en_US
dc.identifier.authorityYam, VWW=rp00822en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1039/DT9900003215en_US
dc.identifier.scopuseid_2-s2.0-25144486802en_US
dc.identifier.issue11en_US
dc.identifier.spage3215en_US
dc.identifier.epage3219en_US
dc.identifier.isiWOS:A1990EH98600010-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridChe, CM=7102442791en_US
dc.identifier.scopusauthoridKwong, HL=35569416300en_US
dc.identifier.scopusauthoridPoon, CK=7202673504en_US
dc.identifier.scopusauthoridYam, VWW=18539304700en_US

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