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Article: Design, synthesis, photophysics, and anion-binding studies of bis(dicyclohexylphosphino)methane-containing dinuclear gold(I) thiolate complexes with urea receptors

TitleDesign, synthesis, photophysics, and anion-binding studies of bis(dicyclohexylphosphino)methane-containing dinuclear gold(I) thiolate complexes with urea receptors
Authors
KeywordsAnions
Gold
P ligands
S ligands
Urea receptors
Issue Date2010
PublisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/chemistry
Citation
Chemistry - A European Journal, 2010, v. 16 n. 30, p. 9123-9131 How to Cite?
AbstractA series of bis(dicyclohexylphosphino)methane (dcpm)-containing gold(I) thiolate complexes with urea receptors, 1-3, has been successfully designed and synthesized, and their photophysical and anion-binding properties have been studied. The linker between the thiolate and the urea group, and the electronic environment of the urea moiety, have been found to exert a great influence on the photophysical and anion-binding properties of the complexes. Complex 3 displays an intense long-lived orange-red luminescence at around 620 nm in the solid state and in the glass state at 77 K, which is considerably red shifted from the band seen in a solution of dichloromethane at room temperature, suggesting the presence of Au···Au interactions. Upon introducing an electronwithdrawing NO2 group, complex 1 was found to show high selectivity and sensitivity for F- through a drastic color change from yellow to red. The anionbinding constants of the complexes have been determined from electronic absorption and1H NMR spectroscopy titration studies and the data were found to fit well to a 1:1 binding model for the interactions between the complexes and the anions. Complexes 1 and 2 show the same anion selectivity trend of F- > AcO- > H2PO4 > Cl- ≈ Br- ≈I -, which is consistent with the trend in anion basicity. In addition, complex 1 has been shown to exhibit higher binding affinity for anions compared with those of complexes 2 and 3, probably due to the higher acidity of the urea moiety as a result of the introduction of the NO2 group. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.
Persistent Identifierhttp://hdl.handle.net/10722/133584
ISSN
2015 Impact Factor: 5.771
2015 SCImago Journal Rankings: 2.323
ISI Accession Number ID
Funding AgencyGrant Number
University of Hong Kong
URC Strategic Research Theme on Molecular Materials
Research Grants Council of Hong Kong Special Administrative Region, P.R. ChinaHKU 7050/08P
EUSTRP 516982
Funding Information:

VW.-W.Y. acknowledges support from The University of Hong Kong under the Distinguished Research Achievement Award Scheme and the URC Strategic Research Theme on Molecular Materials. This work has been supported by a General Research Fund (GRF) grant from the Research Grants Council of Hong Kong Special Administrative Region, P.R. China (HKU 7050/08P) and by the EU project STRP 516982 (HET-EROMOLMAT). X.H. acknowledges the receipt of a postgraduate studentship, administered by The University of Hong Kong.

References

 

DC FieldValueLanguage
dc.contributor.authorHe, Xen_HK
dc.contributor.authorHerranz, Fen_HK
dc.contributor.authorCheng, ECCen_HK
dc.contributor.authorVilar, Ren_HK
dc.contributor.authorYam, VWWen_HK
dc.date.accessioned2011-05-24T02:11:27Z-
dc.date.available2011-05-24T02:11:27Z-
dc.date.issued2010en_HK
dc.identifier.citationChemistry - A European Journal, 2010, v. 16 n. 30, p. 9123-9131en_HK
dc.identifier.issn0947-6539en_HK
dc.identifier.urihttp://hdl.handle.net/10722/133584-
dc.description.abstractA series of bis(dicyclohexylphosphino)methane (dcpm)-containing gold(I) thiolate complexes with urea receptors, 1-3, has been successfully designed and synthesized, and their photophysical and anion-binding properties have been studied. The linker between the thiolate and the urea group, and the electronic environment of the urea moiety, have been found to exert a great influence on the photophysical and anion-binding properties of the complexes. Complex 3 displays an intense long-lived orange-red luminescence at around 620 nm in the solid state and in the glass state at 77 K, which is considerably red shifted from the band seen in a solution of dichloromethane at room temperature, suggesting the presence of Au···Au interactions. Upon introducing an electronwithdrawing NO2 group, complex 1 was found to show high selectivity and sensitivity for F- through a drastic color change from yellow to red. The anionbinding constants of the complexes have been determined from electronic absorption and1H NMR spectroscopy titration studies and the data were found to fit well to a 1:1 binding model for the interactions between the complexes and the anions. Complexes 1 and 2 show the same anion selectivity trend of F- > AcO- > H2PO4 > Cl- ≈ Br- ≈I -, which is consistent with the trend in anion basicity. In addition, complex 1 has been shown to exhibit higher binding affinity for anions compared with those of complexes 2 and 3, probably due to the higher acidity of the urea moiety as a result of the introduction of the NO2 group. © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.en_HK
dc.languageengen_US
dc.publisherWiley - V C H Verlag GmbH & Co KGaA. The Journal's web site is located at http://www.wiley-vch.de/home/chemistryen_HK
dc.relation.ispartofChemistry - A European Journalen_HK
dc.subjectAnionsen_HK
dc.subjectGolden_HK
dc.subjectP ligandsen_HK
dc.subjectS ligandsen_HK
dc.subjectUrea receptorsen_HK
dc.titleDesign, synthesis, photophysics, and anion-binding studies of bis(dicyclohexylphosphino)methane-containing dinuclear gold(I) thiolate complexes with urea receptorsen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0947-6539&volume=16&issue=30&spage=9123&epage=9131&date=2010&atitle=Design,+synthesis,+photophysics,+and+anion-binding+studies+of+bis(dicyclohexylphosphino)methane-containing+dinuclear+gold(I)+thiolate+complexes+with+urea+receptors-
dc.identifier.emailYam, VWW:wwyam@hku.hken_HK
dc.identifier.authorityYam, VWW=rp00822en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/chem.201000647en_HK
dc.identifier.pmid20602366en_HK
dc.identifier.scopuseid_2-s2.0-77955464060en_HK
dc.identifier.hkuros185239en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-77955464060&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume16en_HK
dc.identifier.issue30en_HK
dc.identifier.spage9123en_HK
dc.identifier.epage9131en_HK
dc.identifier.isiWOS:000281312800025-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridHe, X=7404409089en_HK
dc.identifier.scopusauthoridHerranz, F=8354602700en_HK
dc.identifier.scopusauthoridCheng, ECC=7201743424en_HK
dc.identifier.scopusauthoridVilar, R=7007023938en_HK
dc.identifier.scopusauthoridYam, VWW=18539304700en_HK

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