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Article: Structures, photoluminescence, and reversible vapoluminescence properties of neutral platinum(II) complexes containing extended π-conjugated cyclometalated ligands

TitleStructures, photoluminescence, and reversible vapoluminescence properties of neutral platinum(II) complexes containing extended π-conjugated cyclometalated ligands
Authors
Issue Date2006
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, 2006, v. 128 n. 25, p. 8297-8309 How to Cite?
AbstractReacting K2PtCl4 with the tridentate R-C^N^C-H 2 ligands 2,6-di-(2′-naphthyl)-4-R-pyridine (R = H, 1a; Ph, 1b; 4-BrC6H4, 1c; 3,5-F2C6H 3, 1d) in glacial acetic acid, followed by heating in dimethyl sulfoxide (DMSO), gave complexes [(R-C^N^C)Pt(DMSO)] (2a-d). In the crystal structures of 2a-c, the molecules are paired in a head-to-tail orientation with Pt⋯Pt separations >6.3 Å, and there are extensive close C-H⋯π (d = 2.656-2.891 Å), π⋯π (d = 3.322-3.399 Å), and C-H⋯O=S (d = 2.265-2.643 Å) contacts. [(Ph-C^N^C)Pt(PPh3)] (3) was prepared by reacting 2b with PPh 3. Reactions of 2a-d with bis(diphenylphosphino)-methane (dppm) gave [(R-C^N^C)2Pt2(μ-dppm)] (4a-d). Both head-to-head (syn) and head-to-tail (anti) conformations were found for 4a·6CHCl 3·C5H12, whereas only one conformation was observed for 4b· 2CHCl3 (syn), 4c·3CH 2Cl2 (syn), and 4d·2CHCl3 (anti). In the crystal structures of 4a-d, there are close intramolecular Pt⋯Pt contacts of 3.272-3.441 Å in the syn conformers, and long intramolecular Pt⋯Pt separations of 5.681-5.714 Å in the anti conformers. There are weak C-H⋯X (d = 2.497-3.134 Å) and X⋯X (X = Cl or Br; d = 2.973-3.655 Å) interactions between molecules 4a-d and occluded CHCl3/CH2Cl2 molecules, and their solvent channels are of varying diameters (∼9-28 Å). Complexes 2a-d, 3, and 4a-d are photoluminescent in the solid state, with emission maxima at 602-643 nm. Upon exposure to volatile organic compounds, 4a shows a fast and reversible vapoluminescent response, which is most intense with volatile halogenated solvents (except CCl4). Powder X-ray diffraction analysis of desolvated 4a revealed a more condensed molecular packing of syn and anti complexes than crystal 4a·6CHCl3· C5H 12. © 2006 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/168027
ISSN
2015 Impact Factor: 13.038
2015 SCImago Journal Rankings: 7.123
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorKui, SCFen_HK
dc.contributor.authorChui, SSYen_HK
dc.contributor.authorChe, CMen_HK
dc.contributor.authorZhu, Nen_HK
dc.date.accessioned2012-10-08T03:14:19Z-
dc.date.available2012-10-08T03:14:19Z-
dc.date.issued2006en_HK
dc.identifier.citationJournal Of The American Chemical Society, 2006, v. 128 n. 25, p. 8297-8309en_HK
dc.identifier.issn0002-7863en_HK
dc.identifier.urihttp://hdl.handle.net/10722/168027-
dc.description.abstractReacting K2PtCl4 with the tridentate R-C^N^C-H 2 ligands 2,6-di-(2′-naphthyl)-4-R-pyridine (R = H, 1a; Ph, 1b; 4-BrC6H4, 1c; 3,5-F2C6H 3, 1d) in glacial acetic acid, followed by heating in dimethyl sulfoxide (DMSO), gave complexes [(R-C^N^C)Pt(DMSO)] (2a-d). In the crystal structures of 2a-c, the molecules are paired in a head-to-tail orientation with Pt⋯Pt separations >6.3 Å, and there are extensive close C-H⋯π (d = 2.656-2.891 Å), π⋯π (d = 3.322-3.399 Å), and C-H⋯O=S (d = 2.265-2.643 Å) contacts. [(Ph-C^N^C)Pt(PPh3)] (3) was prepared by reacting 2b with PPh 3. Reactions of 2a-d with bis(diphenylphosphino)-methane (dppm) gave [(R-C^N^C)2Pt2(μ-dppm)] (4a-d). Both head-to-head (syn) and head-to-tail (anti) conformations were found for 4a·6CHCl 3·C5H12, whereas only one conformation was observed for 4b· 2CHCl3 (syn), 4c·3CH 2Cl2 (syn), and 4d·2CHCl3 (anti). In the crystal structures of 4a-d, there are close intramolecular Pt⋯Pt contacts of 3.272-3.441 Å in the syn conformers, and long intramolecular Pt⋯Pt separations of 5.681-5.714 Å in the anti conformers. There are weak C-H⋯X (d = 2.497-3.134 Å) and X⋯X (X = Cl or Br; d = 2.973-3.655 Å) interactions between molecules 4a-d and occluded CHCl3/CH2Cl2 molecules, and their solvent channels are of varying diameters (∼9-28 Å). Complexes 2a-d, 3, and 4a-d are photoluminescent in the solid state, with emission maxima at 602-643 nm. Upon exposure to volatile organic compounds, 4a shows a fast and reversible vapoluminescent response, which is most intense with volatile halogenated solvents (except CCl4). Powder X-ray diffraction analysis of desolvated 4a revealed a more condensed molecular packing of syn and anti complexes than crystal 4a·6CHCl3· C5H 12. © 2006 American Chemical Society.en_HK
dc.languageengen_US
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.subject.meshCyclizationen_US
dc.subject.meshLigandsen_US
dc.subject.meshLuminescenceen_US
dc.subject.meshMolecular Structureen_US
dc.subject.meshOrganoplatinum Compounds - Chemistryen_US
dc.subject.meshPhotochemistryen_US
dc.subject.meshPowder Diffractionen_US
dc.subject.meshSolvents - Chemistryen_US
dc.subject.meshSpectrum Analysisen_US
dc.subject.meshVolatilizationen_US
dc.titleStructures, photoluminescence, and reversible vapoluminescence properties of neutral platinum(II) complexes containing extended π-conjugated cyclometalated ligandsen_HK
dc.typeArticleen_HK
dc.identifier.emailKui, SCF: stevenku@hku.hken_HK
dc.identifier.emailChui, SSY: chuissy@hkucc.hku.hken_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.authorityKui, SCF=rp00715en_HK
dc.identifier.authorityChui, SSY=rp00686en_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/ja061422xen_HK
dc.identifier.pmid16787094-
dc.identifier.scopuseid_2-s2.0-33745637436en_HK
dc.identifier.hkuros130656-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33745637436&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume128en_HK
dc.identifier.issue25en_HK
dc.identifier.spage8297en_HK
dc.identifier.epage8309en_HK
dc.identifier.isiWOS:000238418000046-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridKui, SCF=6506763660en_HK
dc.identifier.scopusauthoridChui, SSY=8297453100en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK

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