Abstract: A siloxane compound according to the present invention is represented by the general formula (1). wherein X are each independently either X1 or X2 with the proviso that at least one of X is X2; R1 to R5 are each independently a hydrogen atom, a C1-C8 alkyl, alkenyl or alkynyl group, a phenyl group or a pyridyl group; each of R1 to R5 may have a carbon atom replaced by an oxygen atom and may have an ether bond, a carbonyl group or an ester bond in its structure; m and n are each independently an integer of 1 to 10; and Y are each independently a specific cross-linking group. The siloxane compound according to the present invention has flowability and easy formability at lower temperatures as compared to conventional silsesquioxanes.

Abstract: A production process of a trialkylphosphine according to the present invention includes: a first step of forming a trialkylphosphine by reaction of an organic metal compound and an organic phosphorous compound in an ether solvent having a difference in boiling point with the trialkylphosphine formed such that the difference in boiling point is in a range of 0° C. to 20° C.; a second step of obtaining a silver complex by absorption of a gas phase of the first step into an aqueous solution of AgI and KI; a third step of heating the silver complex obtained in the second step, in a metallic reaction vessel, at a temperature of 170° C. to 350° C. in a reduced pressure atmosphere of 1.333×10?7 MPa to 6.133×10?2 MPa; and a fourth step of cooling a gas product of the third step at a very low temperature range of ?196° C. to ?50° C. to trap the trialkylphosphine.

Abstract: [Object] To provide a wide band-gap material capable of forming a stable amorphous thin film and an organic electroluminescent device using such a compound and having a high light emission efficiency. [Solution] It has been found that a novel oligophenylene derivative, which is applicable as an organic electroluminescent material, can be produced efficiently using a cross-coupling reaction. It has also been found that a highly-efficient blue phosphorescent light-emitting device can be produced using this compound. The present invention is based on these findings.