Organometallic compound, organic light-emitting device including the organometallic compound, and diagnostic composition including the organometallic compound

An organometallic compound represented by Formula 1:

• wherein, in Formula 1,
• M is Pt or Pd,
• two bonds selected from a bond between X1 and M, a bond between X2 and M, and a bond between X3 and M are each a coordinate bond, and the other thereof is a covalent bond,
• Y1 to Y4 and Y7 to Y12 are each independently C or N,
• Y5 and Y6 are each independently C, N, Si, O, or S,
• a bond between Y5 and X1, a bond between X1 and Y1, a bond between Y2 and X2, a bond between X2 and Y3, a bond between Y4 and X3, a bond between X3 and Y6, a bond between Y7 and Y8, a bond between Y8 and Y9, a bond between Y10 and Y11, and a bond between Y11 and Y12 are each a chemical bond that links the corresponding atoms,
• CY1 to CY5 are each independently a C5-C30 carbocyclic group or a C1-C30 heterocyclic group,
• T1 is selected from *—N[(L6)b6-(R6)]—*′, *—B(R6)—*′, *—P(R6)—*′, *—C(R6)(R7)—*′, *—Si(R6)(R7)—*′, *—Ge(R6)(R7)—*′, *—S—*′, *—Se—*′, *—O—*′, *—C(═O)—*′, *—S(═O)—*′, *—S(═O)2—*′, *—C(R6)=*′, *═C(R6)—*′, *—C(R6)═C(R7)—*′, *—C(═S)—*′, and *—C≡C—*′,
• L6 is selected from a single bond, a substituted or unsubstituted C5-C30 carbocyclic group, and a substituted or unsubstituted C1-C30 heterocyclic group,
• b6 is selected from 1 to 3, wherein, provided that when b6 is two or more, two or more groups L6 are identical to or different from each other,
• R6 and R7 are optionally linked via a first linking group to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• n1 is 0, 1, 2, or 3, wherein, when n1 is zero, *-(T1)n1-*′ is a single bond,
• R1 to R7 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, —SF5, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C10 heterocycloalkyl group, a substituted or unsubstituted C3-C10 cycloalkenyl group, a substituted or unsubstituted C1-C10 heterocycloalkenyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C6-C60 arylthio group, a substituted or unsubstituted C7-C60 arylalkyl group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted C2-C60 heteroaryloxy group, a substituted or unsubstituted C2-C60 heteroarylthio group, a substituted or unsubstituted C3-C60 heteroarylalkyl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, —N(Q1)(Q2), —Si(Q3)(Q4)(Q5), —B(Q6)(Q7), and —P(═O)(Q8)(Q9),
• a1 to a5 are each independently 0, 1, 2, 3, 4, or 5,
• two of groups R1 in the number of a1 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• two of groups R2 in the number of a2 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• two of groups R3 in the number of a3 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• two of groups R4 in the number of a4 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• two of groups R5 in the number of a5 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• R2 and R3 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• R2 and R4 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• R1 and R5 are optionally linked to form a substituted or unsubstituted C5-C30 carbocyclic group or a substituted or unsubstituted C1-C30 heterocyclic group,
• at least one substituent of the substituted C5-C30 carbocyclic group, the substituted C1-C30 heterocyclic group, the substituted C1-C60 alkyl group, the substituted C2-C60 alkenyl group, the substituted C2-C60 alkynyl group, the substituted C1-C60 alkoxy group, the substituted C3-C10 cycloalkyl group, the substituted C1-C10 heterocycloalkyl group, the substituted C3-C10 cycloalkenyl group, the substituted C1-C10 heterocycloalkenyl group, the substituted C6-C60 aryl group, the substituted C6-C60 aryloxy group, the substituted C6-C60 arylthio group, the substituted C7-C60 arylalkyl group, the substituted C1-C60 heteroaryl group, the substituted C2-C60 heteroaryloxy group, the substituted C2-C60 heteroarylthio group, the substituted C3-C60 heteroarylalkyl group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group is selected from:
• deuterium, —F, Cl, —Br, —I, —CD3, —CD2H, —CDH2, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
• a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 arylalkyl group, a C1-C60 heteroaryl group, a C2-C60 heteroaryloxy group, a C2-C60 heteroarylthio group, a C3-C60 heteroarylalkyl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q11)(Q12), —Si(Q13)(Q14)(Q15), —B(Q16)(Q17), and —P(═O)(Q18)(Q19);
• a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 arylalkyl group, a C1-C60 heteroaryl group, a C2-C60 heteroaryloxy group, a C2-C60 heteroarylthio group, a C3-C60 heteroarylalkyl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
• a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 arylalkyl group, a C1-C60 heteroaryl group, a C2-C60 heteroaryloxy group, a C2-C60 heteroarylthio group, a C3-C60 heteroarylalkyl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from deuterium, —F, —Cl, —Br, —I, —CD3, —CD2H, —CDH2, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 arylalkyl group, a C1-C60 heteroaryl group, a C2-C60 heteroaryloxy group, a C2-C60 heteroarylthio group, a C3-C60 heteroarylalkyl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q21)(Q22), —Si(Q23)(Q24)(Q25), —B(Q26)(Q27), and —P(═O)(Q28)(Q29);
• and
• —N(Q31)(Q32), —Si(Q33)(Q34)(Q35), —B(Q36)(Q37), and —P(═O)(Q38)(Q39), and
• Q1 to Q9, Q11 to Q19, Q21 to Q29, and Q31 to Q39 are each independently selected from hydrogen, deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C1-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C1-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryl group substituted with at least one selected from a C1-C60 alkyl group and a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C7-C60 arylalkyl group, a C1-C60 heteroaryl group, a C2-C60 heteroaryloxy group, a C2-C60 heteroarylthio group, a C3-C60 heteroarylalkyl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.