Quinoxaline Derivative, and Light Emitting Element, Light Emitting Device and Electronic Appliance Using the Same

A quinoxaline derivative represented by the general formula (G21):

• wherein Het is a substituted or unsubstituted five-membered ring or a substituted or unsubstituted condensed ring containing a five-membered ring structure,
• wherein Ar1 and Ar2 each are a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
• wherein Ar3 is a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• wherein R11 to R14 may be the same or different from one another, each of which represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.

A light emitting element comprising a quinoxaline derivative between a pair of electrodes, the quinoxaline derivative being represented by the general formula (G11):

• wherein Het is a substituted or unsubstituted five-membered ring or a substituted or unsubstituted condensed ring containing a five-membered ring structure,
• wherein Ar1 and Ar2 each are a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
• wherein Ar3 is a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• wherein R1 is any of an alkyl group having 1 to 4 carbon atoms and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and
• wherein R11 to R14 may be the same or different from one another, each of which represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.

A light emitting element comprising a quinoxaline derivative between a pair of electrodes, the quinoxaline derivative being represented by the general formula (G21):

• wherein Het is a substituted or unsubstituted five-membered ring or a substituted or unsubstituted condensed ring containing a five-membered ring structure,
• wherein Ar1 and Ar2 each are a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
• wherein Ar3 is a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• wherein R11 to R14 may be the same or different from one another, each of which represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.

An electronic appliance comprising a display portion, the display portion comprising a light emitting element,

• wherein the light emitting element comprising a quinoxaline derivative between a pair of electrode,
• wherein the quinoxaline derivative is represented by the general formula (G11):
• wherein Het is a substituted or unsubstituted five-membered ring or a substituted or unsubstituted condensed ring containing a five-membered ring structure,
• wherein Ar1 and Ar2 each are a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
• wherein Ar3 is a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• wherein R1 is any of an alkyl group having 1 to 4 carbon atoms and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms, and
• wherein R11 to R14 may be the same or different from one another, each of which represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.

An electronic appliance comprising a display portion, the display portion comprising a light emitting element,

• wherein the light emitting element comprising a quinoxaline derivative between a pair of electrode,
• wherein the quinoxaline derivative is represented by the general formula (21):
• wherein Het is a substituted or unsubstituted five-membered ring or a substituted or unsubstituted condensed ring containing a five-membered ring structure,
• wherein Ar1 and Ar2 each are a substituted or unsubstituted arylene group having 6 to 13 carbon atoms,
• wherein Ar3 is a substituted or unsubstituted aryl group having 6 to 13 carbon atoms,
• wherein R11 to R14 may be the same or different from one another, each of which represents any of hydrogen, an alkyl group having 1 to 4 carbon atoms, and a substituted or unsubstituted aryl group having 6 to 13 carbon atoms.