The present invention discloses a 5,12-dihydrotetracene derivative and an organic electroluminescence device employing the 5,12-dihydrotetracene derivative as the thermally activated delayed fluorescence host material or the thermally activated delayed fluorescence dopant material in the light emitting layer. The organic electroluminescence device of the present invention exhibits improved performance, such as reduced power consumption and increased current efficiency.

The present invention discloses a 5,12-dihydrotetracene derivative and an organic electroluminescence device employing the 5,12-dihydrotetracene derivative as the thermally activated delayed fluorescence host material or the thermally activated delayed fluorescence dopant material in the light emitting layer. The organic electroluminescence device of the present invention exhibits improved performance, such as reduced power consumption and increased current efficiency.

Provided herein are compounds which intercalate into the DNA of a cell and are capable of crossing the blood brain barrier of a formula provided herein. Pharmaceutical compositions of the compounds and methods of treating cancer, for example brain, lung, or pancreatic cancer, are also provided herein.

Provided herein are compounds which intercalate into the DNA of a cell and are capable of crossing the blood brain barrier of a formula provided herein. Pharmaceutical compositions of the compounds and methods of treating cancer, for example brain, lung, or pancreatic cancer, are also provided herein.

The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one -olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and -olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and -olefin.

The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one -olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and -olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and -olefin.

The present invention relates to a new transition metal compound based on cyclopenta[b]fluorenyl group, a transition metal catalyst composition containing the same and having high catalytic activity for preparing an ethylene homopolymer or a copolymer of ethylene and one -olefin, a method of preparing an ethylene homopolymer or a copolymer of ethylene and -olefin using the same, and the prepared ethylene homopolymer or the copolymer of ethylene and -olefin.

The present invention relates to a process for preparing a partially hydrogenated polyacene, and a novel intermediate used in such process; also the present invention relates to a process for preparing the corresponding conjugated polyacenes.

The present invention relates to a process for preparing a partially hydrogenated polyacene, and a novel intermediate used in such process; also the present invention relates to a process for preparing the corresponding conjugated polyacenes.

The object of the present invention is to provide a polymer capable of being insolubilized at a low temperature in a short time, having a high hole injecting and transporting ability and a high durability, and a composition for organic electroluminescent element comprising the polymer. The polymer of the present invention comprises a specific crosslinkable group.