| abstract |
An object of the present invention is to provide a material having a high Tg and a wide energy gap. A spirofluorene derivative represented by the following general formula (1) (wherein R 1 is any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, or a group represented by the following structural formula (2)). the .R 2, R 3 representing a represents any of an alkyl group having 1 to 4 carbon hydrogen or carbon, good .R 4 be the same or different and each represent an aryl group having from 6 to 15 carbon atoms .R 5 And R 6 represents any one of hydrogen, an alkyl group having 1 to 4 carbon atoms, or an aryl group having 6 to 15 carbon atoms, which may be the same or different. [Selection figure] None |