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Article: Luminescent cyclometalated N-heterocyclic carbene-containing organogold(III) complexes: Synthesis, characterization, electrochemistry, and photophysical studies

TitleLuminescent cyclometalated N-heterocyclic carbene-containing organogold(III) complexes: Synthesis, characterization, electrochemistry, and photophysical studies
Authors
Issue Date2009
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jacsat/index.html
Citation
Journal Of The American Chemical Society, 2009, v. 131 n. 25, p. 9076-9085 How to Cite?
AbstractA new class of luminescent mononuclear and dinuclear N-heterocyclic carbene-containing gold(III) complexes has been synthesized and characterized. The X-ray crystal structures of most of the complexes have also been determined. Electrochemical studies reveal a ligand-centered reduction originated from the RC∧N∧CR moieties with no oxidation waves. Interestingly, one of the dinuclear complexes exhibited two distinct reduction couples instead of one with the first reduction occurring at less cathodic potential, probably related to the splitting of the π* orbital-based LUMO resulting from intramolecular π-π interaction. The electronic absorption and luminescence behaviors of the complexes have also been investigated. In dichloromethane solution at room temperature, the low-energy absorption bands are assigned as the intraligand π-π* transition, with mixing of a charge transfer character from the aryl ring to the pyridine moiety of the cyclometalating RC∧N∧CR ligand. The low-energy emission bands are ascribed to origins mainly derived from the intraligand π-π* states with an aryl to pyridine charge transfer character of the cyclometalating RC∧N∧CR ligand. © 2009 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/68931
ISSN
2015 Impact Factor: 13.038
2015 SCImago Journal Rankings: 7.123
ISI Accession Number ID
Funding AgencyGrant Number
The University of Hong Kong
World Gold Council GROW Programme
URC Strategic Research Theme on Molecular Materials
GRFHKU 7057/07P
Funding Information:

VW.-W.Y. acknowledges support from The University of Hong Kong under the Distinguished Research Achievement Award Scheme, the World Gold Council GROW Programme, and the URC Strategic Research Theme on Molecular Materials. This work has been supported by a GRF grant from the Research Grants Council of Hong Kong Special Administrative Region, China (HKU 7057/07P). V.K.-M.A. acknowledges the receipt of a postgraduate studentship from The University of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorAu, VKMen_HK
dc.contributor.authorWong, KMCen_HK
dc.contributor.authorZhu, Nen_HK
dc.contributor.authorYam, VWWen_HK
dc.date.accessioned2010-09-06T06:09:01Z-
dc.date.available2010-09-06T06:09:01Z-
dc.date.issued2009en_HK
dc.identifier.citationJournal Of The American Chemical Society, 2009, v. 131 n. 25, p. 9076-9085en_HK
dc.identifier.issn0002-7863en_HK
dc.identifier.urihttp://hdl.handle.net/10722/68931-
dc.description.abstractA new class of luminescent mononuclear and dinuclear N-heterocyclic carbene-containing gold(III) complexes has been synthesized and characterized. The X-ray crystal structures of most of the complexes have also been determined. Electrochemical studies reveal a ligand-centered reduction originated from the RC∧N∧CR moieties with no oxidation waves. Interestingly, one of the dinuclear complexes exhibited two distinct reduction couples instead of one with the first reduction occurring at less cathodic potential, probably related to the splitting of the π* orbital-based LUMO resulting from intramolecular π-π interaction. The electronic absorption and luminescence behaviors of the complexes have also been investigated. In dichloromethane solution at room temperature, the low-energy absorption bands are assigned as the intraligand π-π* transition, with mixing of a charge transfer character from the aryl ring to the pyridine moiety of the cyclometalating RC∧N∧CR ligand. The low-energy emission bands are ascribed to origins mainly derived from the intraligand π-π* states with an aryl to pyridine charge transfer character of the cyclometalating RC∧N∧CR ligand. © 2009 American Chemical Society.en_HK
dc.languageengen_HK
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jacsat/index.htmlen_HK
dc.relation.ispartofJournal of the American Chemical Societyen_HK
dc.titleLuminescent cyclometalated N-heterocyclic carbene-containing organogold(III) complexes: Synthesis, characterization, electrochemistry, and photophysical studiesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0002-7863&volume=131&issue=25&spage=9076&epage=9085&date=2009&atitle=Luminescent+cyclometalated+N-heterocyclic+carbene-containing+organogold(III)+complexes:+synthesis,+characterization,+electrochemistry,+and+photophysical+studiesen_HK
dc.identifier.emailWong, KMC: wongmc@hku.hken_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.emailYam, VWW: wwyam@hku.hken_HK
dc.identifier.authorityWong, KMC=rp00809en_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.identifier.authorityYam, VWW=rp00822en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/ja9027692en_HK
dc.identifier.pmid19485381-
dc.identifier.scopuseid_2-s2.0-67649619340en_HK
dc.identifier.hkuros168992en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67649619340&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume131en_HK
dc.identifier.issue25en_HK
dc.identifier.spage9076en_HK
dc.identifier.epage9085en_HK
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000267631000062-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridAu, VKM=26421974800en_HK
dc.identifier.scopusauthoridWong, KMC=8061067200en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK
dc.identifier.scopusauthoridYam, VWW=18539304700en_HK

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