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Article: Photophysical and electrochemical properties of platinum(II) complexes bearing a chromophore-acceptor dyad and their photocatalytic hydrogen evolution
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TitlePhotophysical and electrochemical properties of platinum(II) complexes bearing a chromophore-acceptor dyad and their photocatalytic hydrogen evolution
 
AuthorsZhang, GJ2
Gan, X3
Xu, QQ3
Chen, Y2
Zhao, XJ2
Qin, B2
Lv, XJ2
Lai, SW1
Fu, WF2 3
Che, CM1
 
Issue Date2012
 
PublisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
 
CitationDalton Transactions, 2012, v. 41 n. 27, p. 8421-8429 [How to Cite?]
DOI: http://dx.doi.org/10.1039/c2dt30415e
 
AbstractA series of platinum(II) complexes bearing a chromophore-acceptor dyad obtained by reacting 4-(p-bromomethylphenyl)-6-phenyl-2,2′-bipyridine or 4′-(p-bromomethylphenyl)-2,2′:6′,2′′-terpyridine with pyridine, 4-phenylpyridine, 4,4′-bipyridine, 1-methyl-4-(pyridin- 4′-yl)pyridinium hexafluorophosphate respectively, were synthesized. Their photophysical properties, emission quenching studies by Pt nanoparticles and methyl viologen, electrochemical properties and photoinduced electron-transfer reactions in a photocatalytic hydrogen-generating system containing triethanolamine and colloidal Pt without an extra electron relay, were investigated. A comparison of the rates of hydrogen production for the two photocatalytic systems, one containing a metal-organic dyad and the other comprising a 1:1 mixture of the parental platinum(II) complexes and the corresponding electron relay, showed that intramolecular electron transfer improves the photocatalytic efficiency. Compared with cyclometalated platinum(II) complexes, the related platinum(II) terpyridyl complexes exhibited poor performance for photocatalytic hydrogen evolution. An investigation into the amount of hydrogen generated by three platinum(II) complexes containing cyclometalated ligands with methyl groups located on different phenyl rings revealed that the efficiency of hydrogen evolution was affected by a subtle change of functional group on ligand, and the hydrogen-generating efficiency in the presence or absence of methyl viologen is comparable, indicating electron transfer from the excited [Pt(C^N^N)] chromophore to colloidal Pt. 1H NMR spectroscopy of the metal-organic dyads in an aqueous solution in the presence of excess triethanolamine revealed that the dyad with a viologen unit was unstable, and a chemical reaction in the compound occurred prior to irradiation by visible light under basic conditions. © The Royal Society of Chemistry 2012.
 
ISSN1477-9226
2013 Impact Factor: 4.097
 
DOIhttp://dx.doi.org/10.1039/c2dt30415e
 
ReferencesReferences in Scopus
 
DC FieldValue
dc.contributor.authorZhang, GJ
 
dc.contributor.authorGan, X
 
dc.contributor.authorXu, QQ
 
dc.contributor.authorChen, Y
 
dc.contributor.authorZhao, XJ
 
dc.contributor.authorQin, B
 
dc.contributor.authorLv, XJ
 
dc.contributor.authorLai, SW
 
dc.contributor.authorFu, WF
 
dc.contributor.authorChe, CM
 
dc.date.accessioned2012-10-08T03:23:49Z
 
dc.date.available2012-10-08T03:23:49Z
 
dc.date.issued2012
 
dc.description.abstractA series of platinum(II) complexes bearing a chromophore-acceptor dyad obtained by reacting 4-(p-bromomethylphenyl)-6-phenyl-2,2′-bipyridine or 4′-(p-bromomethylphenyl)-2,2′:6′,2′′-terpyridine with pyridine, 4-phenylpyridine, 4,4′-bipyridine, 1-methyl-4-(pyridin- 4′-yl)pyridinium hexafluorophosphate respectively, were synthesized. Their photophysical properties, emission quenching studies by Pt nanoparticles and methyl viologen, electrochemical properties and photoinduced electron-transfer reactions in a photocatalytic hydrogen-generating system containing triethanolamine and colloidal Pt without an extra electron relay, were investigated. A comparison of the rates of hydrogen production for the two photocatalytic systems, one containing a metal-organic dyad and the other comprising a 1:1 mixture of the parental platinum(II) complexes and the corresponding electron relay, showed that intramolecular electron transfer improves the photocatalytic efficiency. Compared with cyclometalated platinum(II) complexes, the related platinum(II) terpyridyl complexes exhibited poor performance for photocatalytic hydrogen evolution. An investigation into the amount of hydrogen generated by three platinum(II) complexes containing cyclometalated ligands with methyl groups located on different phenyl rings revealed that the efficiency of hydrogen evolution was affected by a subtle change of functional group on ligand, and the hydrogen-generating efficiency in the presence or absence of methyl viologen is comparable, indicating electron transfer from the excited [Pt(C^N^N)] chromophore to colloidal Pt. 1H NMR spectroscopy of the metal-organic dyads in an aqueous solution in the presence of excess triethanolamine revealed that the dyad with a viologen unit was unstable, and a chemical reaction in the compound occurred prior to irradiation by visible light under basic conditions. © The Royal Society of Chemistry 2012.
 
dc.description.natureLink_to_subscribed_fulltext
 
dc.identifier.citationDalton Transactions, 2012, v. 41 n. 27, p. 8421-8429 [How to Cite?]
DOI: http://dx.doi.org/10.1039/c2dt30415e
 
dc.identifier.doihttp://dx.doi.org/10.1039/c2dt30415e
 
dc.identifier.epage8429
 
dc.identifier.hkuros219329
 
dc.identifier.issn1477-9226
2013 Impact Factor: 4.097
 
dc.identifier.issue27
 
dc.identifier.pmid22643575
 
dc.identifier.scopuseid_2-s2.0-84862866141
 
dc.identifier.spage8421
 
dc.identifier.urihttp://hdl.handle.net/10722/168639
 
dc.identifier.volume41
 
dc.languageeng
 
dc.publisherRoyal Society of Chemistry. The Journal's web site is located at http://www.rsc.org/dalton
 
dc.publisher.placeUnited Kingdom
 
dc.relation.ispartofDalton Transactions
 
dc.relation.referencesReferences in Scopus
 
dc.titlePhotophysical and electrochemical properties of platinum(II) complexes bearing a chromophore-acceptor dyad and their photocatalytic hydrogen evolution
 
dc.typeArticle
 
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Author Affiliations
  1. The University of Hong Kong
  2. Technical Institute of Physics and Chemistry Chinese Academy of Sciences
  3. Yunnan Normal University