| 摘要 |
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. |
