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    • 8. 发明授权
    • Donor-acceptor fluorene scaffolds: a process and uses thereof
    • 供体受体芴支架:其过程和用途
    • US08946682B2
    • 2015-02-03
    • US12894428
    • 2010-09-30
    • Atul GoelSumit ChaurasiaVijay KumarSundar ManoharanR. S. Anand
    • Atul GoelSumit ChaurasiaVijay KumarSundar ManoharanR. S. Anand
    • H01L29/08C07D295/155C07D207/327C07D211/14C07D307/54C07D333/24H01L51/00
    • C07D295/155C07D207/327C07D211/14C07D307/54C07D333/24H01L51/0058Y02E10/549Y02P70/521
    • The present invention relates to novel donor-acceptor fluorene compounds, which can be used as for the fabrication of electroluminescent devices, and a process of preparing said novel compounds. More particularly, the present invention relates to amine donor and nitrile/ester acceptor fluorenes, fluorenones their π-conjugated systems and related compounds, processes for preparing the said compounds including oxidation of fluorenes to corresponding fluorenones and their use in preparing organic electronic devices such as organic light emitting diodes (OLEDs), photovoltaic/solar cell, Field effect transistors and other useful electroluminescent devices. The compounds are prepared by reacting 2H-pyran-2-ones in isolated or rigid conformations with cyclic ketones containing methylene carbonyl moiety in the presence of a base in an organic solvent. The present invention also relates to a new concept and approach to overcome the problem of ‘Green emission defect’ in 9-unsubstituted fluorene-based organic light emitting diodes which occurs due to the conversion of fluorenes to fluorenones that show emission mainly in green-yellow region. In the present invention we have placed donor-acceptor substituents in such a way that donor-acceptor fluorenones show emission in the blue region (instead of green-yellow region) thus improving the blue color purity and overcoming the problem of green emission defect.
    • 本发明涉及可用于制造电致发光器件的新型供体 - 受体芴化合物,以及制备所述新型化合物的方法。 更具体地,本发明涉及胺供体和腈/酯受体芴,芴酮及其共轭体系和相关化合物,制备所述化合物的方法,包括将芴氧化成相应的芴酮及其在制备有机电子器件中的用途, 作为有机发光二极管(OLED),光伏/太阳能电池,场效应晶体管等有用的电致发光器件。 通过在有机溶剂中的碱存在下,将分离或刚性构象中的2H-吡喃-2-酮与含有亚甲基羰基部分的环酮反应制备化合物。 本发明还涉及克服9-未取代的基于芴的有机发光二极管中由于将芴转化为芴酮而发生的“绿色发光缺陷”的新概念和方法,其显示主要以绿黄色 地区。 在本发明中,我们以供体 - 受体芴酮在蓝色区域(而不是绿 - 黄色区域)中显示发射的方式放置了供体 - 受体取代基,从而提高了蓝色纯度并克服了绿色发光缺陷的问题。