Polymer compound and light-emitting element using the same

A polymer compound comprising a constitutional unit represented by the following formula (1) and a constitutional unit represented by the following formula (10):

• in the formula (1),
• R1 and R2 represent each independently an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group,
• Ar1 represents an unsubstituted or substituted arylene group, an unsubstituted or substituted di-valent condensed polycyclic aromatic heterocyclic group or a di-valent aromatic amine residue represented by the following formula (2),
• with the proviso that the skeleton of a ring linked to a naphthalene ring in said unsubstituted or substituted di-valent condensed polycyclic aromatic heterocyclic group consists only of carbon atoms;
• in the formula (2),
• Ar2, Ar3 and Ar4 represent each independently an unsubstituted or substituted arylene group, an unsubstituted or substituted di-valent aromatic heterocyclic group or a group obtained by linking two or more groups selected from the group consisting of unsubstituted or substituted arylene groups and unsubstituted or substituted di-valent aromatic heterocyclic groups,
• R3 and R4 represent each independently a hydrogen atom, an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted mono-valent aromatic heterocyclic group,
• a is 0 or 1:
• in the formula (10),
• R16 represents an unsubstituted or substituted alkyl group, an unsubstituted or substituted aryl group or an unsubstituted or substituted mono-valent aromatic heterocyclic group,
• X represents a single bond, —O—, —S— or —C(Ra)—, wherein Ra represents an unsubstituted or substituted alkyl group or an unsubstituted or substituted aryl group, two Ras may be the same or different.