Organic Electroluminescent Devices and Metal Complex Compounds

A compound represented by formula (9):

• wherein MA1 represents a metal ion;
• QA1 and QA2 each represent an atomic group necessary to form a nitrogen-containing heterocycle;
• RA1, RA2, RA3, and RA4 each represent a hydrogen atom, or a substituent;
• RA1 and RA2, and RA3 and RA4, respectively, may bond to each other to form a ring;
• YA2 and YA3 each represent a linking group or a single bond;
• YA1 represents a linking group, a single bond or double bond for linking two bidentate ligands in parentheses together;
• LA5 represents a ligand to coordinate to MA1;
• and
• nA1 represents an integer of 0 to 4.

An organic electroluminescent device, comprising:

• a pair of electrodes and at least one organic layer including a luminescent layer between the pair of electrodes,
• wherein at least one layer between the pair of electrodes comprises at least one metal complex having a tridentate- or higher polydentate-chain structure ligand, and
• wherein the metal complex is a compound represented by formula (9):
• wherein MA1 represents a metal ion;
• QA1 and QAA2 each represent an atomic group necessary to form a nitrogen-containing heterocycle;
• RA1, RA2, RA3, and RA4 each represent a hydrogen atom, or a substituent;
• RA1 and RA2, and RA3 and RA4, respectively, may bond to each other to form a ring;
• YA2 and YA3 each represent a linking group or a single bond;
• YA1 represents a linking group, a single bond or double bond for linking two bidentate ligands in parentheses together;
• LA5 represents a ligand to coordinate to MA1;
• and
• nA1 represents an integer of 0 to 4.