下述式（2-1）或式（2-2）表示的含氟芳香族化合物。 R 1是具有1至3个碳原子的直链全氟烷基。 X2〜X5卤原子或氢原子，R2至R5，L1和L2为一价烃基具有1-12个碳原子的一价芳族烃基，一价杂芳基，卤原子或氢原子， 是一个原子。 R2〜R5中的一个或多个基团为一价的烃基，一价的芳香族烃基或碳原子数1〜12的一价杂芳族基团。 m是0以上的整数，n表示1以上，M +的整数n是2至6的整数。 [公式1]

The following formula (2-1) or a fluorine-containing aromatic compound represented by the formula (2-2). R ₁ is a straight-chain perfluoroalkyl group having 1 to 3 carbon atoms. _X 2 ~X 5 represents a halogen atom or a hydrogen _{atom, R 2 ~R 5, L 1} and _{L 2} is a monovalent hydrocarbon group having 1 to 12 carbon atoms, monovalent aromatic hydrocarbon group, a monovalent heteroaromatic group , a halogen atom or a hydrogen atom,. One or more radicals of R ₂ to R _{5 of 5} is a monovalent hydrocarbon group, a monovalent aromatic hydrocarbon group or a monovalent heteroaromatic group, having from 1 to 12 carbon atoms. m is an integer of 0 or more, n represents an integer of 1 or more, m + n is an integer from 2 to 6.
[Formula 1]