Polymer compound and light emitting device using the same

A polymer compound comprising:

• at least one terminal constitutional unit represented by the following formula (1) and
• at least one type of constitutional unit selected from the group consisting of constitutional units represented by the following formula (2) and constitutional units represented by the following formula (2′):
• wherein
• mT represents an integer of 0 to 5, nT represents an integer of 1 to 4, and cT represents 0 or 1, and when there are a plurality of mT, they may be the same or different, and nT is 1 when cT is 0,
• QT represents a crosslinkable group represented by the following formula (XL-1), (XL-7), (XL-16) or (XL-17), and when there are a plurality of QT, they may be the same or different,
• KT represents an alkylene group, a cycloalkylene group, an arylene group, a divalent heterocyclic group, a group represented by —NR′—, an oxygen atom or a sulfur atom, the foregoing groups each optionally having a substituent, wherein R′ represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, the foregoing groups each optionally having a substituent, and when there are a plurality of KT, they may be the same or different, and
• ArT represents an aromatic hydrocarbon group or a heterocyclic group, the foregoing groups each optionally having a substituent;
• wherein
• mA represents an integer of 0 to 5, and n represents 1 or 2, and when there are a plurality of mA, they may be the same or different,
• Ar1 represents an aromatic hydrocarbon group or a heterocyclic group, the foregoing groups each optionally having a substituent,
• KA represents an alkylene group, a cycloalkylene group, an arylene group, a divalent heterocyclic group, a group represented by —NR″—, an oxygen atom or a sulfur atom, the foregoing groups each optionally having a substituent, wherein R″ represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, the foregoing groups each optionally having a substituent, and when there are a plurality of KA, they may be the same or different, and
• Q1 represents a crosslinkable group selected from Group A of crosslinkable groups, and when there are a plurality of Q1, they may be the same or different;
• wherein
• mB represents an integer of 0 to 5, m represents an integer of 1 to 4, and c represents 0 or 1, and when there are a plurality of mB, they may be the same or different,
• Ar3 represents an aromatic hydrocarbon group, a heterocyclic group or a group in which at least one type of aromatic hydrocarbon ring and at least one type of heterocyclic ring are bonded directly to each other, the foregoing groups each optionally having a substituent,
• Ar2 and Ar4 each independently represent an arylene group or a divalent heterocyclic group, the foregoing groups each optionally having a substituent,
• each of groups Ar2, Ar3 and Ar4 is optionally bonded directly or via an oxygen atom or a sulfur atom to a group that is attached to the nitrogen atom to which that group is attached but that is different from that group itself, thereby forming a ring,
• KB represents an alkylene group, a cycloalkylene group, an arylene group, a divalent heterocyclic group, a group represented by —NR′″—, an oxygen atom or a sulfur atom, the foregoing groups each optionally having a substituent, wherein R′″ represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, the foregoing groups each optionally having a substituent, and when there are a plurality of KB, they may be the same or different, and
• Q2 represents a crosslinkable group selected from Group A of crosslinkable groups, a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or a monovalent heterocyclic group, the foregoing groups each optionally having a substituent, and when there are a plurality of Q2, they may be the same or different, provided that at least one Q2 is a crosslinkable group selected from Group A of crosslinkable groups,
• wherein Group A is a crosslinkable group selected from the group consisting of:
• wherein RXL represents a methylene group, an oxygen atom or a sulfur atom, and nXL represents an integer of 0 to 5, and when there are a plurality of RXL, they may be the same or different, and when there are a plurality of nXL, they may be the same or different, and * represents a binding site, the foregoing crosslinkable groups each optionally having a substituent.