An organic electroluminescence device which comprises a cathode, an anode and an organic thin film layer comprising at least one layer comprising a light emitting layer and disposed between the cathode and the anode, wherein at least one layer in the organic thin film layer comprises an anthracene derivative having a specific structure singly or as a component of a mixture, and an anthracene derivative having a specific asymmetric structure and providing an organic electroluminescence device exhibiting a great efficiency of light emission and having a long life, are provided.

Provided is a thermoplastic resin including constituent units represented by general formula (1). (In formula (1), R.sub.1 and R.sub.2 each independently represents: a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C1-6 alkyl group; a monocyclic or polycyclic C6-36 aryl group; a monocyclic or polycyclic heteroaryl group having 5-36 ring atoms, 1, 2, 3, or 4 of the ring atoms being selected from nitrogen, sulfur, and oxygen, and the other ring atoms being carbon in the heteroaryl group; a C2-6 alkenyl group; a C1-6 alkoxy group; or a C7-17 aralkyl group. In formula (1), X, a, and b are each as described in the present specification.)

##STR00001##

Provided is a thermoplastic resin including constituent units represented by general formula (1). (In formula (1), R1 and R2 each independently represent: a hydrogen atom; a fluorine atom; a chlorine atom; a bromine atom; an iodine atom; a C1-6 alkyl group; a monocyclic or polycyclic C6-36 aryl group; a monocyclic or polycyclic heteroaryl group having 5-36 ring atoms, 1, 2, 3, or 4 of the ring atoms being selected from nitrogen, sulfur, and oxygen, and the other ring atoms being carbon in the heteroaryl group; a C2-6 alkenyl group; a C1-6 alkoxy group; or a C7-17 aralkyl group. In formula (1), X, a, and bare each as described in the present specification.) ##STR00001##

Methods for forming a crystalline form or an amorphous form of 6,6-diphenyl-2,2-bis(2-hydroxyethoxy)-1,1-binaphthyl and thermoplastic resin therefrom. According to one embodiment, a crystal solvate form of 6,6-diphenyl-2,2-bis(2-hydroxyethoxy)-1,1-binaphthyl, which contains in its crystals from 0.3 to 1.2 mol of an organic solvent per 1 mol of 6,6-diphenyl-2,2-bis(2-hydroxyethoxy)-1,1-binaphthyl, where the organic solvent is selected from the group consisting of methanol, toluene, and methyl ethyl ketone.