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Article: Diarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand design
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TitleDiarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand design
 
AuthorsChan, JCH1
Lam, WH1
Wong, HL1
Zhu, N1
Wong, WT1
Yam, VWW1
 
Issue Date2011
 
PublisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jacsat/index.html
 
CitationJournal Of The American Chemical Society, 2011, v. 133 n. 32, p. 12690-12705 [How to Cite?]
DOI: http://dx.doi.org/10.1021/ja203946g
 
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.
 
ISSN0002-7863
2013 Impact Factor: 11.444
 
DOIhttp://dx.doi.org/10.1021/ja203946g
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorChan, JCH
 
dc.contributor.authorLam, WH
 
dc.contributor.authorWong, HL
 
dc.contributor.authorZhu, N
 
dc.contributor.authorWong, WT
 
dc.contributor.authorYam, VWW
 
dc.date.accessioned2012-08-16T05:48:44Z
 
dc.date.available2012-08-16T05:48:44Z
 
dc.date.issued2011
 
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.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationJournal Of The American Chemical Society, 2011, v. 133 n. 32, p. 12690-12705 [How to Cite?]
DOI: http://dx.doi.org/10.1021/ja203946g
 
dc.identifier.doihttp://dx.doi.org/10.1021/ja203946g
 
dc.identifier.eissn1520-5126
 
dc.identifier.epage12705
 
dc.identifier.hkuros204389
 
dc.identifier.issn0002-7863
2013 Impact Factor: 11.444
 
dc.identifier.issue32
 
dc.identifier.pmid21780780
 
dc.identifier.scopuseid_2-s2.0-80051589080
 
dc.identifier.spage12690
 
dc.identifier.urihttp://hdl.handle.net/10722/159335
 
dc.identifier.volume133
 
dc.languageeng
 
dc.publisherAmerican Chemical Society. The Journal's web site is located at http://pubs.acs.org/journals/jacsat/index.html
 
dc.publisher.placeUnited States
 
dc.relation.ispartofJournal of the American Chemical Society
 
dc.relation.referencesReferences in Scopus
 
dc.titleDiarylethene-containing cyclometalated platinum(II) complexes: Tunable photochromism via metal coordination and rational ligand design
 
dc.typeArticle
 
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<description.abstract>The synthesis, characterization, electrochemistry, photophysics and photochromic behavior of a new class of cyclometalated platinum(II) complexes [Pt(C &#8743;N)(O &#8743;O)] (1a-5a and 1b-5b), where C &#8743;N is a cyclometalating 2-(2&#8242;-thienyl)pyridyl (thpy) or 2-(2&#8242;-thienothienyl)pyridyl (tthpy) ligand containing the photochromic dithienylethene (DTE) unit and O &#8743;O is a &#946;-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 &#8743;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 &#960;-conjugation of the C &#8743;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. &#169; 2011 American Chemical Society.</description.abstract>
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Author Affiliations
  1. The University of Hong Kong