Morphology Control of Oxadiazole Compounds by Introduction of Amine Moieties
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Accession number;05A0303234
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| Title;Morphology Control of Oxadiazole Compounds by Introduction of Amine Moieties |
| Author;
MOCHIZUKI H
(National Inst. Of Advanced Industrial Sci. And Technol. (aist), Osaka, Jpn)
HASUI T
(Tokyo Inst. Of Technol., Yokohama, Jpn)
IKEDA T
(Tokyo Inst. Of Technol., Yokohama, Jpn)
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Journal Title;Jpn J Appl Phys Part 1
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Journal Code:G0520B
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ISSN:0021-4922
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VOL.44;NO.1B;PAGE.485-490(2005)
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| Figure&Table&Reference;FIG.9, TBL.1, REF.28 |
| Pub. Country;Japan |
| Language;English |
| Abstract;Three oxadiazole derivatives with an amine and an alkyl tail were designed and synthesized as novel photo- and electro-active materials: 2-(4'-propylbiphenyl-4-yl)-5-(4-N,N-dimethylaminophenyl-4-yl)-1,3,4,-oxadiazole (3-OXD-Me), 2-(4'-heptybiphenyl-4-yl)-5-(4-N,N-dimethylaminophenyl-4-yl)-1,3,4,-oxadiazole (7-OXD-Me), 2-(4'-heptylbiphenyl-4-yl)-5-(4-N,N-diphenylaminophenyl)-1,3,4,-oxadiazole (7-OXD-Ph). It was found that the length of an alkyl tail and the structure of an amine strongly affect the phase structure of the oxadiazole derivatives; 3-OXD-Me showed a crystalline phase, 7-OXD-Me showed a liquid-crystalline (LC; nematic) phase and 7-OXD-Ph exhibited a glassy amorphous state. All the compounds emitted strong blue fluorescence: the maximum wavelengths of emission were 420-436 nm with high quantum yields (0.81-0.91). Furthermore, polarized photoluminescence was observed in 7-OXD-Me in a nematic phase, and the order parameter estimated by the polarized emission was 0.18. These compounds, therefore, are potential multifunctional materials for photo- and electro-active devices. (author abst.) |
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