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Article: Diarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand design

TitleDiarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand design
Authors
Issue Date2011
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, 2011, v. 133 n. 32, p. 12690-12705 How to Cite?
AbstractThe synthesis, characterization, electrochemistry, photophysics and photochromic behavior of a new class of cyclometalated platinum(II) complexes [Pt(C ∧N)(O ∧O)] (1a-5a and 1b-5b), where C ∧N is a cyclometalating 2-(2′-thienyl)pyridyl (thpy) or 2-(2′-thienothienyl)pyridyl (tthpy) ligand containing the photochromic dithienylethene (DTE) unit and O ∧O is a β-diketonato ligand of acetylacetonato (acac) or hexafluoroacetylacetonato (hfac), have been reported. The X-ray crystal structures of five of the complexes have also been determined. The electrochemical studies reveal that the first quasi-reversible reduction couple, and hence the nature of lowest unoccupied molecular orbital (LUMO) of the complexes, is sensitive to the nature of the ancillary O ∧O ligands. Upon photoexcitation, complexes 1a-3a and 1b-3b exhibit drastic color changes, ascribed to the reversible photochromic behavior, which is found to be sensitive to the substituents on the pyridyl ring and the extent of π-conjugation of the C ∧N ligand as well as the nature of the ancillary ligand. The thermal bleaching kinetics of complex 1a has been studied in toluene at various temperatures, and the activation barrier for the thermal cycloreversion of the complex has been determined. Density functional theory (DFT) calculations have been performed to provide an insight into the electrochemical, photophysical and photochromic properties. © 2011 American Chemical Society.
Persistent Identifierhttp://hdl.handle.net/10722/159335
ISSN
2014 Impact Factor: 12.113
2014 SCImago Journal Rankings: 5.567
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorChan, JCHen_HK
dc.contributor.authorLam, WHen_HK
dc.contributor.authorWong, HLen_HK
dc.contributor.authorZhu, Nen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorYam, VWWen_HK
dc.date.accessioned2012-08-16T05:48:44Z-
dc.date.available2012-08-16T05:48:44Z-
dc.date.issued2011en_HK
dc.identifier.citationJournal Of The American Chemical Society, 2011, v. 133 n. 32, p. 12690-12705en_HK
dc.identifier.issn0002-7863en_HK
dc.identifier.urihttp://hdl.handle.net/10722/159335-
dc.description.abstractThe synthesis, characterization, electrochemistry, photophysics and photochromic behavior of a new class of cyclometalated platinum(II) complexes [Pt(C ∧N)(O ∧O)] (1a-5a and 1b-5b), where C ∧N is a cyclometalating 2-(2′-thienyl)pyridyl (thpy) or 2-(2′-thienothienyl)pyridyl (tthpy) ligand containing the photochromic dithienylethene (DTE) unit and O ∧O is a β-diketonato ligand of acetylacetonato (acac) or hexafluoroacetylacetonato (hfac), have been reported. The X-ray crystal structures of five of the complexes have also been determined. The electrochemical studies reveal that the first quasi-reversible reduction couple, and hence the nature of lowest unoccupied molecular orbital (LUMO) of the complexes, is sensitive to the nature of the ancillary O ∧O ligands. Upon photoexcitation, complexes 1a-3a and 1b-3b exhibit drastic color changes, ascribed to the reversible photochromic behavior, which is found to be sensitive to the substituents on the pyridyl ring and the extent of π-conjugation of the C ∧N ligand as well as the nature of the ancillary ligand. The thermal bleaching kinetics of complex 1a has been studied in toluene at various temperatures, and the activation barrier for the thermal cycloreversion of the complex has been determined. Density functional theory (DFT) calculations have been performed to provide an insight into the electrochemical, photophysical and photochromic properties. © 2011 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.titleDiarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand designen_HK
dc.typeArticleen_HK
dc.identifier.emailLam, WH: chsue@hku.hken_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.emailYam, VWW: wwyam@hku.hken_HK
dc.identifier.authorityLam, WH=rp00719en_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.identifier.authorityYam, VWW=rp00822en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1021/ja203946gen_HK
dc.identifier.pmid21780780-
dc.identifier.scopuseid_2-s2.0-80051589080en_HK
dc.identifier.hkuros204389en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-80051589080&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume133en_HK
dc.identifier.issue32en_HK
dc.identifier.spage12690en_HK
dc.identifier.epage12705en_HK
dc.identifier.eissn1520-5126-
dc.identifier.isiWOS:000294740000066-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridChan, JCH=49461054400en_HK
dc.identifier.scopusauthoridLam, WH=26642862800en_HK
dc.identifier.scopusauthoridWong, HL=35101098200en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridYam, VWW=18539304700en_HK

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