Journal
TETRAHEDRON
Volume 66, Issue 48, Pages 9348-9355Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tet.2010.10.009
Keywords
p-Phenylene ethynylene; Oligomer; Silsesquioxane; Photoluminescence; Light-emitting diode
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Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT), Japanese Government at JAIST
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Two new classes of mono- and oligo(p-phenylene ethynylene)s grafted with polyhedral oligomeric silsesquioxanes (POSS) were synthesized via 'click' chemistry and palladium-catalyzed Sonogashira cross-coupling. These materials with cubic silsesquioxanes are very robust with excellent thermal stability in air (T-5%loss>330 degrees C) and exhibited T-g>80 degrees C. All the compounds showed high photoluminescence with a range of blue emission and quantum yield up to 80% in the solution. Extended pi conjugation molecules of oligo-pPEs POSS maintain relatively high PL quantum efficiencies in the solid state, compared to mono-pPEs POSS. A preliminary report is made of some of the materials as multilayer OLED components with active dopants PVK and PBD. (C) 2010 Elsevier Ltd. All rights reserved.
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