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Article: Electronic communication between tungsten alkylidyne and metal isocyanide complex fragments across phenyleneethynylene bridges

TitleElectronic communication between tungsten alkylidyne and metal isocyanide complex fragments across phenyleneethynylene bridges
Authors
KeywordsElectron transfer
Metal isocyanide complex
Photoluminescence
Tungsten alkylidyne complex
Issue Date2006
PublisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jorganchem
Citation
Journal Of Organometallic Chemistry, 2006, v. 691 n. 21, p. 4514-4531 How to Cite?
AbstractHeteronuclear metal complexes of the type [X(CO)2(LL)W{triple bond, long}C(-C6H4-C{triple bond, long}C)p-C6H4-N{triple bond, long}C-]nMLm (X = Cl, Br; LL = tmeda, dppe; p = 0-3; n = 1 for Cr(CO)5, n = 2 for ReX(CO)3, PdCl2, PdI2, and PtI2) have been prepared. The molecular structure of one example, [Cl(CO)2(tmeda)W{triple bond, long}C-C6H4-N{triple bond, long}C-]2PdI2, was determined by X-ray crystallography. The extent of electronic communication between the tungsten alkylidyne and the metal isocyanide centers was probed by various spectroscopic techniques. In the parent systems (p = 0), the electronic changes due to modification of the isocyanide metal complex fragments could be distinguished clearly by the 13C NMR chemical shift of the alkylidyne carbon atom and the d → π* and π → π* electronic transitions of the metal alkylidyne system. However, only residual effects could be discerned for the longer systems using these spectroscopic probes. Probes based on the emission property of the tungsten alkylidyne fragment proved to be the most useful in distinguishing long-range effects in those cases where the isocyanide metal complex fragment is capable of quenching the emission. This is the case for MLm = PdCl2 and PdI2. Partial quenching effects were still observed at the longest investigated distance between the metal centers of about 3.1 nm. The available evidence suggests that the quenching mechanism is electron transfer. © 2006 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/70065
ISSN
2015 Impact Factor: 2.336
2015 SCImago Journal Rankings: 0.732
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorYu, MPYen_HK
dc.contributor.authorYam, VWWen_HK
dc.contributor.authorCheung, KKen_HK
dc.contributor.authorMayr, Aen_HK
dc.date.accessioned2010-09-06T06:19:23Z-
dc.date.available2010-09-06T06:19:23Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of Organometallic Chemistry, 2006, v. 691 n. 21, p. 4514-4531en_HK
dc.identifier.issn0022-328Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/70065-
dc.description.abstractHeteronuclear metal complexes of the type [X(CO)2(LL)W{triple bond, long}C(-C6H4-C{triple bond, long}C)p-C6H4-N{triple bond, long}C-]nMLm (X = Cl, Br; LL = tmeda, dppe; p = 0-3; n = 1 for Cr(CO)5, n = 2 for ReX(CO)3, PdCl2, PdI2, and PtI2) have been prepared. The molecular structure of one example, [Cl(CO)2(tmeda)W{triple bond, long}C-C6H4-N{triple bond, long}C-]2PdI2, was determined by X-ray crystallography. The extent of electronic communication between the tungsten alkylidyne and the metal isocyanide centers was probed by various spectroscopic techniques. In the parent systems (p = 0), the electronic changes due to modification of the isocyanide metal complex fragments could be distinguished clearly by the 13C NMR chemical shift of the alkylidyne carbon atom and the d → π* and π → π* electronic transitions of the metal alkylidyne system. However, only residual effects could be discerned for the longer systems using these spectroscopic probes. Probes based on the emission property of the tungsten alkylidyne fragment proved to be the most useful in distinguishing long-range effects in those cases where the isocyanide metal complex fragment is capable of quenching the emission. This is the case for MLm = PdCl2 and PdI2. Partial quenching effects were still observed at the longest investigated distance between the metal centers of about 3.1 nm. The available evidence suggests that the quenching mechanism is electron transfer. © 2006 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier SA. The Journal's web site is located at http://www.elsevier.com/locate/jorganchemen_HK
dc.relation.ispartofJournal of Organometallic Chemistryen_HK
dc.subjectElectron transferen_HK
dc.subjectMetal isocyanide complexen_HK
dc.subjectPhotoluminescenceen_HK
dc.subjectTungsten alkylidyne complexen_HK
dc.titleElectronic communication between tungsten alkylidyne and metal isocyanide complex fragments across phenyleneethynylene bridgesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-328X&volume=691&spage=4514&epage=4531&date=2006&atitle=Electronic+Communication+Between+Tungsten+Alkylidyne+And+Metal+Isocyanide+Complex+Fragments+Across+Phenyleneethynylene+Bridges+en_HK
dc.identifier.emailYam, VWW:wwyam@hku.hken_HK
dc.identifier.authorityYam, VWW=rp00822en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.jorganchem.2006.02.029en_HK
dc.identifier.scopuseid_2-s2.0-33748893771en_HK
dc.identifier.hkuros152922en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748893771&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume691en_HK
dc.identifier.issue21en_HK
dc.identifier.spage4514en_HK
dc.identifier.epage4531en_HK
dc.identifier.isiWOS:000241308600023-
dc.publisher.placeSwitzerlanden_HK
dc.identifier.scopusauthoridYu, MPY=36800576900en_HK
dc.identifier.scopusauthoridYam, VWW=18539304700en_HK
dc.identifier.scopusauthoridCheung, KK=7402406613en_HK
dc.identifier.scopusauthoridMayr, A=7102753384en_HK

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