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Article: Design and synthesis of luminescence chemosensors based on alkynyl phosphine gold(i)-copper(i) aggregates

TitleDesign and synthesis of luminescence chemosensors based on alkynyl phosphine gold(i)-copper(i) aggregates
Authors
Issue Date2011
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
Citation
Dalton Transactions, 2011, v. 40 n. 38, p. 9703-9710 How to Cite?
AbstractReceptor-containing polynuclear mixed-metal complexes of gold(i)-copper(i) 1-3 based on a [{Au 3Cu 2(CCPh) 6}Au 3{PPh 2-C 6H 4-PPh 2} 3] 2+ (Au 6Cu 2) core with benzo-15-crown-5, oligoether and urea binding sites were designed and synthesized, respectively. These complexes exhibited remarkably strong red emission at ca. 619-630 nm in dichloromethane solution at room temperature upon photoexcitation at λ > 400 nm, with the emission quantum yield in the range 0.59-0.85. The cation-binding properties of 1 and 2 and the anion-binding properties of 3 were studied using UV-vis, emission and 1H NMR techniques. Complex 1, with six benzo-15-crown-5 pendants, was found to show a higher binding preference for K +, with a selectivity trend of K + ≫ Cs + > Na + > Li +. The addition of metal ions (Li +, Na +, K + and Cs +) to complex 1 led to a modest emission enhancement with a concomitant slight blue shift in energy and well-defined isoemissive points, which is attributed to the rigidity of the structure and the inhibited PET (photo-induced electron transfer) process from the oxygen to the aggregate as a result of the binding of the metal ion. The six urea receptor groups on complex 3 were found to form multiple hydrogen bonding interactions with anions, with the positive charge providing additional electrostatic interaction for anion-binding. The anion selectivity of 3 follows the trend F - > Cl - ≈ H 2PO 4 - > Br - and the highest affinity towards F - is attributed to the stronger basicity of F -, as well as its good size match with the cavity of the urea pocket. © 2011 The Royal Society of Chemistry.
Persistent Identifierhttp://hdl.handle.net/10722/159339
ISSN
2015 Impact Factor: 4.177
2015 SCImago Journal Rankings: 1.404
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorHe, Xen_HK
dc.contributor.authorZhu, Nen_HK
dc.contributor.authorYam, VWWen_HK
dc.date.accessioned2012-08-16T05:48:45Z-
dc.date.available2012-08-16T05:48:45Z-
dc.date.issued2011en_HK
dc.identifier.citationDalton Transactions, 2011, v. 40 n. 38, p. 9703-9710en_HK
dc.identifier.issn1477-9226en_HK
dc.identifier.urihttp://hdl.handle.net/10722/159339-
dc.description.abstractReceptor-containing polynuclear mixed-metal complexes of gold(i)-copper(i) 1-3 based on a [{Au 3Cu 2(CCPh) 6}Au 3{PPh 2-C 6H 4-PPh 2} 3] 2+ (Au 6Cu 2) core with benzo-15-crown-5, oligoether and urea binding sites were designed and synthesized, respectively. These complexes exhibited remarkably strong red emission at ca. 619-630 nm in dichloromethane solution at room temperature upon photoexcitation at λ > 400 nm, with the emission quantum yield in the range 0.59-0.85. The cation-binding properties of 1 and 2 and the anion-binding properties of 3 were studied using UV-vis, emission and 1H NMR techniques. Complex 1, with six benzo-15-crown-5 pendants, was found to show a higher binding preference for K +, with a selectivity trend of K + ≫ Cs + > Na + > Li +. The addition of metal ions (Li +, Na +, K + and Cs +) to complex 1 led to a modest emission enhancement with a concomitant slight blue shift in energy and well-defined isoemissive points, which is attributed to the rigidity of the structure and the inhibited PET (photo-induced electron transfer) process from the oxygen to the aggregate as a result of the binding of the metal ion. The six urea receptor groups on complex 3 were found to form multiple hydrogen bonding interactions with anions, with the positive charge providing additional electrostatic interaction for anion-binding. The anion selectivity of 3 follows the trend F - > Cl - ≈ H 2PO 4 - > Br - and the highest affinity towards F - is attributed to the stronger basicity of F -, as well as its good size match with the cavity of the urea pocket. © 2011 The Royal Society of Chemistry.en_HK
dc.languageengen_US
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/daltonen_HK
dc.relation.ispartofDalton Transactionsen_HK
dc.subject.meshAlkynes - chemistryen_HK
dc.subject.meshCopper - chemistryen_HK
dc.subject.meshCrystallizationen_HK
dc.subject.meshCrystallography, X-Rayen_HK
dc.subject.meshFluorescent Dyes - chemical synthesis - chemistryen_HK
dc.subject.meshGold - chemistryen_HK
dc.subject.meshModels, Molecularen_HK
dc.subject.meshMolecular Structureen_HK
dc.subject.meshOrganometallic Compounds - chemical synthesis - chemistryen_HK
dc.subject.meshPhosphines - chemistryen_HK
dc.subject.meshStereoisomerismen_HK
dc.titleDesign and synthesis of luminescence chemosensors based on alkynyl phosphine gold(i)-copper(i) aggregatesen_HK
dc.typeArticleen_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.emailYam, VWW: wwyam@hku.hken_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.identifier.authorityYam, VWW=rp00822en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1039/c1dt10197hen_HK
dc.identifier.pmid21858312-
dc.identifier.scopuseid_2-s2.0-80055041539en_HK
dc.identifier.hkuros204452en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80055041539&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume40en_HK
dc.identifier.issue38en_HK
dc.identifier.spage9703en_HK
dc.identifier.epage9710en_HK
dc.identifier.isiWOS:000295038400009-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridHe, X=26324648600en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK
dc.identifier.scopusauthoridYam, VWW=18539304700en_HK

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