http://dx.doi.org/10.1021/ma1009319">
 

Document Type

Journal Article

Authors

Thomas Goudreault, Département de Chimie, Université de Sherbrooke
Ze He, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist University
Yanhe Guo
Cheuk-Lam Ho, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist UniversityFollow
Hongmei Zhan, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist University
Qiwei Wang, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist University
Keith Yat-Fung Ho, Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University
Ka-Leung Wong, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist UniversityFollow
Daniel Fortin, Département de Chimie, Université de Sherbrooke
Bing Yao, State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
Zhiyuan Xie, State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
Lixiang Wang, State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
Wai-Ming Kwok, Department of Applied Biology and Chemical Technology, Hong Kong Polytechnic University
Pierre D. Harvey, Département de Chimie, Université de Sherbrooke
Wai-Yeung Wong, Department of Chemistry, Centre for Advanced Luminescence Materials, Hong Kong Baptist UniversityFollow

Department/Unit

Department of Chemistry

Title

Synthesis, light-emitting, and two-photon absorption properties of platinum-containing poly(arylene-ethynylene)s linked by 1,3,4-oxadiazole units

Language

English

Abstract

A series of soluble and thermally stable group 10 platinum(II) polyyne polymers of the type [-C≡C-Pt(PBu3)2-C≡C-Ar- Ox-Ar-]n (where Ox = 1,3,4-oxadiazole; Ar = p-C6H 4 or 2,7-dihexyl-9,9-fluorene) and [-C≡C-Pt(PBu 3)2-C≡C-Ar-Ox-Ar-Ox-Ar-]n (where Ar = 2,7-dihexyl-9,9-fluorene) along with their corresponding dinuclear model compounds [Ph-Pt(PEt3)2-C≡C-Ar-]2-Ox- (where Ar = p-C6H4 or 2,7-dihexyl-9,9-fluorene) and [Ph-Pt(PEt3)2-C≡C-Ar-Ox-]2-Ar- (where Ar = 2,7-dihexyl-9,9-fluorene) were prepared and characterized. The regiochemical structure of the polymers has been ascertained by single-crystal X-ray analysis on the model compound [Ph-Pt(PEt3)2-C≡C-p-C 6H4-]2-Ox-. The photophysical properties (absorption, excitation, emission, and nanosecond transient absorption spectra) of these metalated compounds in 2MeTHF at 298 and 77 K are reported. These findings are correlated by density functional theory (DFT) calculations. Geometry optimizations predict totally planar molecules for these metalated complexes and polymers, allowing better π-conjugation across the main chain. The ligands are strongly fluorescent but become also phosphorescent when the Pt atom is introduced in the backbone of the conjugated organometallic complexes and polymers. These emissions are assigned to ππ* transitions in all cases involving the Pt dxy orbitals. These Pt compounds exhibit two-photon absorption (2PA), and their 2PA cross sections (σ2) have been determined. The potential of exploiting such metallopolymers for the design of electrophosphorescent polymer light-emitting devices (PLEDs) and their use as single-dopant for white PLEDs have also been discussed. © 2010 American Chemical Society.

Publication Date

2010

Source Publication Title

Macromolecules

Volume

43

Issue

19

Start Page

7936

End Page

7949

Publisher

American Chemical Society

ISSN (print)

00249297

ISSN (electronic)

15205835

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