Several new derivatives of 1,8-naphthalimide, which are connected with 1,3,4-oxadiazole via a covalent bond, have been synthesized. We have investigated the electroluminescent (EL) device fabricated with these new compounds. In these compounds 1,3,4-oxadiazole moiety facilitates the electron injection from the electrode and transfers its excited energy to 1,8-naphthalimide which acts as an emitting center. Greenish yellow EL peaked at 532 nm with a maximum luminous efficiency of 0.43 lm/W was observed.
1,1-Diferrocenylethylenes have been synthesized efficiently by palladium-catalyzed cross-coupling reaction. The interaction of the two ferrocene units has been investigated in the neutral, monocationic and dicationic states using spectroscopic analyses.
Dehydration polymerization of a dicarboxylic acid and glycol proceeded in an aqueous medium by using lipase catalyst to produce an aliphatic polyester. Enzyme origin and the monomer structure affected the yield and molecular weight of the product polyester.