File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Light-Emitting Tridentate Cyclometalated Platinum(II) Complexes Containing σ-Alkynyl Auxiliaries: Tuning of Photo- and Electrophosphorescence

TitleLight-Emitting Tridentate Cyclometalated Platinum(II) Complexes Containing σ-Alkynyl Auxiliaries: Tuning of Photo- and Electrophosphorescence
Authors
Issue Date2004
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, 2004, v. 126 n. 15, p. 4958-4971 How to Cite?
AbstractThe synthesis and structural, photophysical, electrochemical, and electroluminescent properties of a class of platinum(II) complexes bearing σ-alkynyl ancillary ligands, namely (C/N/N)Pt(C≡C) nR] [H(C/N/N) = 6-aryl-2,2′-bipyridine; n = 1-4; R = aryl, alkyl, or trimethylsilyl], have been studied. Substituents with different steric and electronic properties were introduced into the tridentate cyclometalating and arylacetylide ligands, and the π-conjugation length of the oligoynyl moiety was homologously extended from ethynyl to octatetraynyl. The X-ray crystal structures of several derivatives confirm the Pt-(C≡C) ligation and reveal various intermolecular interactions, such as π-π, Pt⋯Pt, and C-H⋯F-C. The complexes display good thermal stability and intense phosphorescence in fluid and glassy solutions with high quantum yields and microsecond lifetimes. Their emission energies are sensitive to solvent polarity, the electronic affinities of the substituents on both the cyclometalating and arylacetylide groups, and the length of the oligoynyl ligand. By choosing appropriate cyclometalating and σ-alkynyl ligands, the emission color of this class of platinum(II) complexes can be tuned from green-yellow to saturated red. In addition to 3MLCT [Pt(5d) → π*(C/N/N)] and 3 IL(C/N/N), intriguing 3IL(alkynyl) excited states localized on -(C≡C) 4- and -(C≡Cpyrenyl-1) moieties that afford narrow-bandwidth emissions have been observed. Selected Pt(II) complexes were doped into the emissive region of multilayer, vapor-deposited organic light-emitting diodes. The tunable electrophosphorescence energy resembles that recorded in fluid solutions for these emitters, and the devices exhibit high luminance and efficiencies (up to 4.2 cd A -1).
Persistent Identifierhttp://hdl.handle.net/10722/167926
ISSN
2015 Impact Factor: 13.038
2015 SCImago Journal Rankings: 7.123
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLu, Wen_HK
dc.contributor.authorMi, BXen_HK
dc.contributor.authorChan, MCWen_HK
dc.contributor.authorHui, Zen_HK
dc.contributor.authorChe, CMen_HK
dc.contributor.authorZhu, Nen_HK
dc.contributor.authorLee, STen_HK
dc.date.accessioned2012-10-08T03:13:00Z-
dc.date.available2012-10-08T03:13:00Z-
dc.date.issued2004en_HK
dc.identifier.citationJournal Of The American Chemical Society, 2004, v. 126 n. 15, p. 4958-4971en_HK
dc.identifier.issn0002-7863en_HK
dc.identifier.urihttp://hdl.handle.net/10722/167926-
dc.description.abstractThe synthesis and structural, photophysical, electrochemical, and electroluminescent properties of a class of platinum(II) complexes bearing σ-alkynyl ancillary ligands, namely (C/N/N)Pt(C≡C) nR] [H(C/N/N) = 6-aryl-2,2′-bipyridine; n = 1-4; R = aryl, alkyl, or trimethylsilyl], have been studied. Substituents with different steric and electronic properties were introduced into the tridentate cyclometalating and arylacetylide ligands, and the π-conjugation length of the oligoynyl moiety was homologously extended from ethynyl to octatetraynyl. The X-ray crystal structures of several derivatives confirm the Pt-(C≡C) ligation and reveal various intermolecular interactions, such as π-π, Pt⋯Pt, and C-H⋯F-C. The complexes display good thermal stability and intense phosphorescence in fluid and glassy solutions with high quantum yields and microsecond lifetimes. Their emission energies are sensitive to solvent polarity, the electronic affinities of the substituents on both the cyclometalating and arylacetylide groups, and the length of the oligoynyl ligand. By choosing appropriate cyclometalating and σ-alkynyl ligands, the emission color of this class of platinum(II) complexes can be tuned from green-yellow to saturated red. In addition to 3MLCT [Pt(5d) → π*(C/N/N)] and 3 IL(C/N/N), intriguing 3IL(alkynyl) excited states localized on -(C≡C) 4- and -(C≡Cpyrenyl-1) moieties that afford narrow-bandwidth emissions have been observed. Selected Pt(II) complexes were doped into the emissive region of multilayer, vapor-deposited organic light-emitting diodes. The tunable electrophosphorescence energy resembles that recorded in fluid solutions for these emitters, and the devices exhibit high luminance and efficiencies (up to 4.2 cd A -1).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.titleLight-Emitting Tridentate Cyclometalated Platinum(II) Complexes Containing σ-Alkynyl Auxiliaries: Tuning of Photo- and Electrophosphorescenceen_HK
dc.typeArticleen_HK
dc.identifier.emailChe, CM: cmche@hku.hken_HK
dc.identifier.emailZhu, N: nzhu@hkucc.hku.hken_HK
dc.identifier.authorityChe, CM=rp00670en_HK
dc.identifier.authorityZhu, N=rp00845en_HK
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1021/ja0317776en_HK
dc.identifier.pmid15080702-
dc.identifier.scopuseid_2-s2.0-1942504121en_HK
dc.identifier.hkuros90928-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-1942504121&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume126en_HK
dc.identifier.issue15en_HK
dc.identifier.spage4958en_HK
dc.identifier.epage4971en_HK
dc.identifier.isiWOS:000220849900046-
dc.publisher.placeUnited Statesen_HK
dc.identifier.scopusauthoridLu, W=55277832700en_HK
dc.identifier.scopusauthoridMi, BX=6701912426en_HK
dc.identifier.scopusauthoridChan, MCW=7402598116en_HK
dc.identifier.scopusauthoridHui, Z=7005565139en_HK
dc.identifier.scopusauthoridChe, CM=7102442791en_HK
dc.identifier.scopusauthoridZhu, N=7201449530en_HK
dc.identifier.scopusauthoridLee, ST=7601407495en_HK

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats