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Article: Photoluminescence, photoredox properties and crystal structures of rhenium(V)-benzylidyne complexes with phosphine ligands

TitlePhotoluminescence, photoredox properties and crystal structures of rhenium(V)-benzylidyne complexes with phosphine ligands
Authors
Issue Date1996
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, 1996 n. 13, p. 2827-2834 How to Cite?
AbstractSeveral rhenium(V)-benzylidyne complexes [Re(CR)(pdpp)2Cl]+ [R = C6H2Me3-2,4,6, pdpp = o-phenylenebis(diphenylphosphine)], [Re(CR)L2(CO)(H2O)Cl]+ [L = PPh3, P(C6H4OMe-p)3 or PMe2Ph] and trans-[Re(CR)(dppe)(CO)2Cl]+ [dppe = 1,2-bis(diphenylphosphino)ethane] have been prepared. The structures of trans-[Re(CR)(pdpp)2Cl]ClO4·CHCl 3·0.25MeOH and [Re(CR)(PPh3)2(CO)(H2O)Cl]ClO 4· 1.5MeOH have been determined by X-ray analyses. The Re≡C distances are 1.802(5) and 1.784(8) Å respectively. In acetonitrile and dichloromethane the complexes show intense absorption bands at 318-330 nm and weak ones at 405-450 nm, the latter being tentatively assigned to dxy → dπ* (dxz,dyz) transitions. Photoexcitation in the solution, solid or glassy state gives intense orange to red emissions, and the emitting states are tentatively assigned to 3[(dxy)1(dπ*)1]. The variation in non-radiative decay rate constants for the emissions of the rhenium(V)-benzylidyne complexes are consistent with a prediction from the energy-gap law. The excited states are better oxidants and reductants than the ground states. The values of Eo(ReV*-ReIV) and Eo(ReVI-ReV*) in acetonitrile have been determined using spectroscopic and electrochemical data as well as by Stern-Volmer quenching experiments.
Persistent Identifierhttp://hdl.handle.net/10722/69603
ISSN
1999 Impact Factor: 2.31
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorXue, WMen_HK
dc.contributor.authorWang, Yen_HK
dc.contributor.authorMak, TCWen_HK
dc.contributor.authorChe, CMen_HK
dc.date.accessioned2010-09-06T06:15:10Z-
dc.date.available2010-09-06T06:15:10Z-
dc.date.issued1996en_HK
dc.identifier.citationJournal Of The Chemical Society - Dalton Transactions, 1996 n. 13, p. 2827-2834en_HK
dc.identifier.issn0300-9246en_HK
dc.identifier.urihttp://hdl.handle.net/10722/69603-
dc.description.abstractSeveral rhenium(V)-benzylidyne complexes [Re(CR)(pdpp)2Cl]+ [R = C6H2Me3-2,4,6, pdpp = o-phenylenebis(diphenylphosphine)], [Re(CR)L2(CO)(H2O)Cl]+ [L = PPh3, P(C6H4OMe-p)3 or PMe2Ph] and trans-[Re(CR)(dppe)(CO)2Cl]+ [dppe = 1,2-bis(diphenylphosphino)ethane] have been prepared. The structures of trans-[Re(CR)(pdpp)2Cl]ClO4·CHCl 3·0.25MeOH and [Re(CR)(PPh3)2(CO)(H2O)Cl]ClO 4· 1.5MeOH have been determined by X-ray analyses. The Re≡C distances are 1.802(5) and 1.784(8) Å respectively. In acetonitrile and dichloromethane the complexes show intense absorption bands at 318-330 nm and weak ones at 405-450 nm, the latter being tentatively assigned to dxy → dπ* (dxz,dyz) transitions. Photoexcitation in the solution, solid or glassy state gives intense orange to red emissions, and the emitting states are tentatively assigned to 3[(dxy)1(dπ*)1]. The variation in non-radiative decay rate constants for the emissions of the rhenium(V)-benzylidyne complexes are consistent with a prediction from the energy-gap law. The excited states are better oxidants and reductants than the ground states. The values of Eo(ReV*-ReIV) and Eo(ReVI-ReV*) in acetonitrile have been determined using spectroscopic and electrochemical data as well as by Stern-Volmer quenching experiments.en_HK
dc.languageengen_HK
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_HK
dc.relation.ispartofJournal of the Chemical Society - Dalton Transactionsen_HK
dc.titlePhotoluminescence, photoredox properties and crystal structures of rhenium(V)-benzylidyne complexes with phosphine ligandsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=1472-7773&volume=&spage=2827&epage=2834&date=1996&atitle=Photoluminescence,+photoredox+properties+and+crystal+structures+of+rhenium(v)-benzylidyne+complexes+with+phosphine+ligandsen_HK
dc.identifier.emailChe, CM:cmche@hku.hken_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/DT9960002827-
dc.identifier.scopuseid_2-s2.0-33748514123en_HK
dc.identifier.hkuros21918en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748514123&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.issue13en_HK
dc.identifier.spage2827en_HK
dc.identifier.epage2834en_HK
dc.identifier.isiWOS:A1996UW62500034-
dc.identifier.scopusauthoridXue, WM=7103165059en_HK
dc.identifier.scopusauthoridWang, Y=8637619000en_HK
dc.identifier.scopusauthoridMak, TCW=7401931058en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK

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