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Article: Structural, photophysical, and electrophosphorescent properties of platinum(II) complexes supported by tetradentate N2O2 chelates

TitleStructural, photophysical, and electrophosphorescent properties of platinum(II) complexes supported by tetradentate N2O2 chelates
Authors
KeywordsCharge transfer
Electroluminescence
N,O ligands
Phosphorescence
Platinum
Issue Date2003
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, 2003, v. 9 n. 6, p. 1263-1272 How to Cite?
AbstractWe present an examination of the structural and photophysical characteristics of [Pt(N2O2)] complexes bearing bis(phenoxy)diimine auxiliaries (diimine = 4,7-Ph2phen (1) and 4,4′-tBu2bpy (2)) that are tetradentate relatives of the quinolinolato (q) ligand. These neutral derivatives display high thermal stability (> 400 °C in N2). While the crystal lattice in 1 consists of (head-to-tail)-interacting dimers, molecules of 2 are arranged into infinitely stacked planar sheets with possible π-π interactions but no close Pt⋯Pt contacts. Complexes 1 and 2 exhibit moderately intense low-energy UV/Vis absorptions around λ=400-500 nm that undergo negative solvatochromic shifts. Both derivatives are highly luminescent in solution at 298 K with emission lifetimes in the ps range, and mixed 3[1→π*(diimine)] (l=lone pair/phenoxide) and 3[Pt(d)→π*(diimine)] charge-transfer states are tentatively assigned. The excited-state properties of 2 are also investigated by time-resolved absorption spectroscopy and by quenching experiments with pyridinium acceptors to estimate the excited-state redox potential. These emitters have been employed as electrophosphorescent dopants in multilayer OLEDs. Differences between the brightness, color, and overall performance of devices incorporating 1 and 2 are attributed to the influence of the diimine substituents.
Persistent Identifierhttp://hdl.handle.net/10722/167787
ISSN
2015 Impact Factor: 5.771
2015 SCImago Journal Rankings: 2.323
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLin, YYen_HK
dc.contributor.authorChan, SCen_HK
dc.contributor.authorChan, MCWen_HK
dc.contributor.authorHou, YJen_HK
dc.contributor.authorZhu, Nen_HK
dc.contributor.authorChe, CMen_HK
dc.contributor.authorLiu, Yen_HK
dc.contributor.authorWang, Yen_HK
dc.date.accessioned2012-10-08T03:11:35Z-
dc.date.available2012-10-08T03:11:35Z-
dc.date.issued2003en_HK
dc.identifier.citationChemistry - A European Journal, 2003, v. 9 n. 6, p. 1263-1272en_HK
dc.identifier.issn0947-6539en_HK
dc.identifier.urihttp://hdl.handle.net/10722/167787-
dc.description.abstractWe present an examination of the structural and photophysical characteristics of [Pt(N2O2)] complexes bearing bis(phenoxy)diimine auxiliaries (diimine = 4,7-Ph2phen (1) and 4,4′-tBu2bpy (2)) that are tetradentate relatives of the quinolinolato (q) ligand. These neutral derivatives display high thermal stability (> 400 °C in N2). While the crystal lattice in 1 consists of (head-to-tail)-interacting dimers, molecules of 2 are arranged into infinitely stacked planar sheets with possible π-π interactions but no close Pt⋯Pt contacts. Complexes 1 and 2 exhibit moderately intense low-energy UV/Vis absorptions around λ=400-500 nm that undergo negative solvatochromic shifts. Both derivatives are highly luminescent in solution at 298 K with emission lifetimes in the ps range, and mixed 3[1→π*(diimine)] (l=lone pair/phenoxide) and 3[Pt(d)→π*(diimine)] charge-transfer states are tentatively assigned. The excited-state properties of 2 are also investigated by time-resolved absorption spectroscopy and by quenching experiments with pyridinium acceptors to estimate the excited-state redox potential. These emitters have been employed as electrophosphorescent dopants in multilayer OLEDs. Differences between the brightness, color, and overall performance of devices incorporating 1 and 2 are attributed to the influence of the diimine substituents.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.subjectCharge transferen_HK
dc.subjectElectroluminescenceen_HK
dc.subjectN,O ligandsen_HK
dc.subjectPhosphorescenceen_HK
dc.subjectPlatinumen_HK
dc.titleStructural, photophysical, and electrophosphorescent properties of platinum(II) complexes supported by tetradentate N2O2 chelatesen_HK
dc.typeArticleen_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1002/chem.200390143en_HK
dc.identifier.pmid12645015-
dc.identifier.scopuseid_2-s2.0-0037451411en_HK
dc.identifier.hkuros83818-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037451411&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume9en_HK
dc.identifier.issue6en_HK
dc.identifier.spage1263en_HK
dc.identifier.epage1272en_HK
dc.identifier.isiWOS:000181817400002-
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridLin, YY=7406585692en_HK
dc.identifier.scopusauthoridChan, SC=7404256345en_HK
dc.identifier.scopusauthoridChan, MCW=7402598116en_HK
dc.identifier.scopusauthoridHou, YJ=7402198922en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK
dc.identifier.scopusauthoridLiu, Y=36012292400en_HK
dc.identifier.scopusauthoridWang, Y=8637619000en_HK

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