In addition, unless otherwise expressed, where any formula of the present invention is represented by the following formula, the substituent according to the index may be defined as follows.
In the above formula, where a is an integer of zero, the substituent R1 is absent, that is, hydrogen atoms are bonded to all the carbon constituting the benzene ring. Here, chemical formulas or compounds may be written without explicitly describing the hydrogen. In addition, one substituent R1 is bonded to any carbon of the carbons forming the benzene ring when “a” is an integer of 1. Similarly, where “a” is an integer of 2 or 3, substituents R1s may be bonded to the carbon of the benzene ring, for example, as followings. Also, where “a” is an integer of 4 to 6, substituents R1s are bonded to the carbon of the benzene ring in a similar manner. Further, where “a” is an integer of 2 or more, R1s may be the same or different from each other.
Hereinafter, a laminated structure of the electric element comprising the compound of the present invention will be described with reference to