Synthesis and Characterization of Polymerizable Phosphorescent Platinum(II) Complexes for Solution-Processible Organic Light-Emitting Diodes
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- 作者：Jian-Yang Cho ; Benoit Domercq ; Stephen Barlow ; Kyrill Yu. Suponitsky ; Jennifer Li ; Tatiana V. Timofeeva ; Simon C. Jones ; Lauren E. Hayden ; Alpay Kimyonok ; Clinton R. South ; Marcus Weck ; Bernard Kippel
- 刊名：Organometallics
- 出版年：2007
- 出版时间：September 10, 2007
- 年：2007
- 卷：26
- 期：19
- 页码：4816 - 4829
- 全文大小：369K
- 年卷期：v.26,no.19(September 10, 2007)
- ISSN：1520-6041
文摘
A norbornene-functionalized derivative of acetylacetone has been used to synthesize a series of newpolymerizable norbornene-derivatized phosphorescent platinum complexes of the form Pt(C
N)(OO*)where CN represents a cyclometalated ligand and OO* represents the functionalized acetylacetonateligand. The complexes have been fully characterized, and the structures of three examples have beendetermined by X-ray diffraction. Solution absorption and luminescence spectra and electrochemical dataare very similar to those for analogues without these polymerizable groups. A 9,9-dialkyl-2,7-di(carbazol-9-yl)fluorene material, in which one of the alkyl groups bears a norbornene group, has been synthesizedand copolymerized with the Pt(CN)(OO*) complexes using Grubbs ruthenium catalysts, resulting incopolymers with broad molecular weight distributions. The copolymers have been used as lumophoresin organic light-emitting diodes, thus demonstrating that platinum phosphors can be successfully integratedinto the "hybrid" approach to organic light-emitting diodes, in which molecules with transport orluminescent properties are covalently attached to electronically inert polymer backbones to give solution-processible materials. Emission from aggregate states appears to play a similar role in these copolymersto that seen in vapor-deposited devices based on small phosphor and host molecules; in particular,considerable aggregate emission is observed when a phosphor with blue solution emission is used in thedevices.
N)(OO*)where CN represents a cyclometalated ligand and OO* represents the functionalized acetylacetonateligand. The complexes have been fully characterized, and the structures of three examples have beendetermined by X-ray diffraction. Solution absorption and luminescence spectra and electrochemical dataare very similar to those for analogues without these polymerizable groups. A 9,9-dialkyl-2,7-di(carbazol-9-yl)fluorene material, in which one of the alkyl groups bears a norbornene group, has been synthesizedand copolymerized with the Pt(CN)(OO*) complexes using Grubbs ruthenium catalysts, resulting incopolymers with broad molecular weight distributions. The copolymers have been used as lumophoresin organic light-emitting diodes, thus demonstrating that platinum phosphors can be successfully integratedinto the "hybrid" approach to organic light-emitting diodes, in which molecules with transport orluminescent properties are covalently attached to electronically inert polymer backbones to give solution-processible materials. Emission from aggregate states appears to play a similar role in these copolymersto that seen in vapor-deposited devices based on small phosphor and host molecules; in particular,considerable aggregate emission is observed when a phosphor with blue solution emission is used in thedevices.