- 著者
-
又賀 駿太郎
五郎丸 英貴
Costea Ion
アンドリーセン スヴェン
ティーマン ティース
澤田 剛
高橋 和文
- 出版者
- 九州大学機能物質科学研究所
- 雑誌
- 九州大学機能物質科学研究所報告 (ISSN:09143793)
- 巻号頁・発行日
- vol.14, no.2, pp.157-164, 2000
- 被引用文献数
-
1
Oxadiazolopyridine compounds have seen synthesized with the aim of preparing red fluorescent organic material for organic electrolum inescent devices. 10-Oxoindenooxadiazolopyridines, which were synthesized from acetophenone derivatives in 4 steps, show red fluorescence in the solid state, albeit with a weak intensity. 10-Hydroxy derivatives emit fluorescence of yellow to orange color, however these compounds are instable in air. Oxadiazolopyridenes having thiophene and furan rings at the 4- and 7-positions, prepared from the corresponding heterocyclic methyl ketones, emit intense red fluorescence above 600nm in the solid state. Of special note is 4,7-di(5'-phenyl-2'-thienyl)oxadiazolopyridine which shows red fluorescence at 669nm. An EL device using 5'-phenyl-2'-thienyl derivative as a light-emitting materials was fabricated by Kyushu Matsushita corporation. This device emitted red EL at 680nm. In the cyclic voltammogram, oxadiazolopyridines show a reversible redox wave at -0.9~-1.17V. The oxadiazolopyridine ring having an electron-withdrawing substituent was reduced at low cathodic potential.