https://scholars.lib.ntu.edu.tw/handle/123456789/297436
Title: | Ter(9,9-diarylfluorene)s: Highly efficient blue emitter with promising electrochemical and thermal stability | Authors: | Wong, K.-T. CHUNG-CHIH WU SHIE-MING PENG KEN-TSUNG WONG |
Issue Date: | 2002 | Journal Volume: | 124 | Journal Issue: | 39 | Start page/Pages: | 11576-11577 | Source: | Journal of the American Chemical Society | Abstract: | Novel ter(9,9-diarylfluorene)s were synthesized by a Suzuki-coupling reaction of 2-bromofluorene (1) and 2,7-fluorenediboronic ester derivatives (3) with high isolated yields (63-86%). The X-ray structure analysis of ter(9,9′-spirobifluorene) (4aa) revealed that the conjugated chromophore adopts a helical conformation. This conformation effectively releases the steric interaction between the fluorene moieties and prevents inter-chromophore interactions. The introduction of aryl groups at the C9 position of fluorene was highly beneficial to the thermal and morphological stability of these oligomers. These terfluorenes exhibit intense blue fluorescence with excellent quantum yields both in solution (∼100%) and in solid state (66-90%), and possess interesting reversible redox properties. Highly efficient blue light-emitting OLED devices were fabricated using 4aa and 4cc as emitters as well as hole transporters. The devices exhibit low turn-on voltage (∼3 V) and high EL external quantum efficiency (2.5-3%). Copyright © 2002 American Chemical Society. |
URI: | http://www.scopus.com/inward/record.url?eid=2-s2.0-0037009995&partnerID=MN8TOARS http://scholars.lib.ntu.edu.tw/handle/123456789/297436 https://www.scopus.com/inward/record.uri?eid=2-s2.0-0037009995&doi=10.1021%2fja0269587&partnerID=40&md5=195d680bf591a1ee0b839d029d82afc2 |
ISSN: | 00027863 | DOI: | 10.1021/ja0269587 | SDG/Keyword: | fluorene derivative; polycyclic aromatic hydrocarbon derivative; article; chemical analysis; chemical reaction; electrochemistry; thermostability |
Appears in Collections: | 化學系 |
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