| abstract |
An organic compound having a tetrahedral configuration having a structure represented by the following general formula (I): (I) wherein A1 to A4 are each independently a cyclic unsaturated five-membered ring or six-membered unsaturated; B 1 is a direct bond, -C -, - O -, - N -, - S- , or -C =C-;m is 0 or 1; R a is hydrogen, fluorine, substituted or unsubstituted C 1 -C 12 alkyl or substituted or unsubstituted C 6 -C 12 aryl; and n is An integer from 0 to 2. |