A method for reducing the mutagenicity of polycyclic aromatic compounds (PAC's) having one or more bay regions which involves alkylating the PAC's with an alkylating agent in the presence of a catalyst to lower the mutagenicity down to as much as about 0.1. The resulting alkylated polycyclic aromatic compounds retain their physical and chemical properties for safe industrial use including as rubber processing oils, inks, etc.

The present specification provides a compound of Chemical Formula 1, and an organic light emitting device including the same. The compound of Chemical Formula 1 used in one or more organic material layers of an organic light emitting device provides enhanced efficiency, lowered driving voltage, and increased lifetime of the device.

A compound having the structure of Formula I

##STR00001##

is disclosed. In the structure of Formula I, each of R.sub.1, R.sub.2, and R.sub.3 is independently a hydrogen, a non-fused aryl group having one meta-substituent, or a non-fused heteroaryl six-membered ring having one or more meta-substituents; each meta-substituent is a non-fused aryl or non-fused heteroaryl six-membered ring optionally substituted with further substituents selected from the group consisting of non-fused aryl groups, non-fused heteroaryl groups, and alkyl groups; and at least one of R.sub.1, R.sub.2, and R.sub.3 is a non-fused aryl having one meta-substituent or a heteroaryl six-membered ring having at least one meta-substituent, wherein each meta-substituent is a non-fused aryl or non-fused heteroaryl group further substituted with a chain of at least two non-fused aryl or non-fused heteroaryl groups. The compounds may be useful in phosphorescent organic light emitting devices.

The present specification provides an amine-based compound and an organic light emitting device including the same.

The present specification provides an amine compound and an organic light emitting device including the same.

An electrochromic compound represented by the following formula (1) is provided: ##STR00001## where each of R.sub.1 to R.sub.9 and Ar.sub.1 to Ar.sub.6 independently represents one of a hydrogen atom, a halogen atom, a monovalent organic group, a group in which two or more aryl and/or heteroaryl groups are bound to each other via a covalent bond, a group in which two or more aryl and/or heteroaryl groups are condensed with each other to form a ring, and a polymerizable functional group; and at least one of Ar.sub.1 to Ar.sub.6 represents an aryl group, a heteroaryl group, a group in which two or more aryl and/or heteroaryl groups are bound to each other via a covalent bond, or a group in which at least two aryl or heteroaryl groups are condensed with each other to form a ring.

A novel compound is provided. Alight-emitting device having high emission efficiency and a long lifetime is also provided. An organic compound is represented by General Formula (G2), in which a benzo[a]anthracene skeleton is bonded to the 2-position of an anthracene skeleton. In General Formula (G2), R1 to R3, R5 to R12, and R21 to R29 each independently represent any one of hydrogen, an alkyl group having 1 to 6 carbon atoms, a cycloalkyl group having 3 to 6 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms in a ring. Another embodiment of the present invention is a light-emitting device including the compound.

##STR00001##

A compound having the structure of Formula I ##STR00001##
is disclosed. In the structure of Formula I, each of R.sub.1, R.sub.2, and R.sub.3 is independently a hydrogen, a non-fused aryl group having one meta-substituent, or a non-fused heteroaryl six-membered ring having one or more meta-substituents; each meta-substituent is a non-fused aryl or non-fused heteroaryl six-membered ring optionally substituted with further substituents selected from the group consisting of non-fused aryl groups, non-fused heteroaryl groups, and alkyl groups; and at least one of R.sub.1, R.sub.2, and R.sub.3 is a non-fused aryl having one meta-substituent or a heteroaryl six-membered ring having at least one meta-substituent, wherein each meta-substituent is a non-fused aryl or non-fused heteroaryl group further substituted with a chain of at least two non-fused aryl or non-fused heteroaryl groups. The compounds may be useful in phosphorescent organic light emitting devices.

An organic light-emitting medium including a pyrene derivative represented by the following formula (1) and a phenyl-substituted anthracene derivative represented by the following formula (2): ##STR00001##
wherein Ar.sup.1 to Ar.sup.4 are independently a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 20 ring atoms.

Polycyclic aromatic hydrocarbons represented by the following general formula (I) wherein X is one of nitrogen, phosphorus, arsenic, antimony, bismuth, sulphur, selenium, tellurium; R independently represents an aromatic group and/or an aliphatic group; Q is one of a cyclic aliphatic hydrocarbon, a cyclic aromatic hydrocarbon, a polycyclic hydrocarbon, a polycyclic aromatic hydrocarbon, and/or a fused polycyclic aromatic hydrocarbon; wherein the substituents independently comprise one or more of a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a bromine atom, a carbon atom, an oxygen atom (e.g. an alkylated oxygen atom), a nitrogen atom (e.g. an alkylated nitrogen atom), a cyano group, a nitro group, an alkyl group and/or anaryl group; p is an integer of 1 to 2; q is an integer of 1 to 4; Y.sup.1 and Y.sup.2 independently represent one or more of a hydrogen atom, a deuterium atom, a fluorine atom, a chlorine atom, a bromine atom, a carbon atom, an oxygen atom (e.g. an alkylated oxygen atom), a nitrogen atom (e.g. an alkylated nitrogen 20 atom), a cyano group, a nitro group, an alkyl group and/oranaryl group; and x is an integer of 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 or more.

##STR00001##