There is provided a compound having Formula (I) In the formula: R1-4 are the same or different and are H, D, alkyl, silyl, aryl, deuterated alkyl, deuterated silyl, deuterated aryl, or an electron-withdrawing group; R5 is H, D, alkyl, aryl, deuterated alkyl, or deuterated aryl; and R6-R9 are the same or different and are H, D, alkyl, silyl, aryl, deuterated alkyl, deuterated silyl, or deuterated aryl. At least one of R1-4 is an electron-withdrawing group.
提供一种具有
化学式(I)的化合物。在公式中:R1-4相同或不同,可以是H、D、烷基、
硅基、芳基、
氘代烷基、
氘代
硅基、
氘代芳基或者电子吸引基团;R5是H、D、烷基、芳基、
氘代烷基或
氘代芳基;R6-R9相同或不同,可以是H、D、烷基、
硅基、芳基、
氘代烷基、
氘代
硅基或
氘代芳基。R1-4中至少有一个是电子吸引基团。