Polymer complex and production process therefor

A coordination polymer being luminescent at a temperature equal to or higher than 250° C. and comprising a repeating unit denoted by the following general formula (10):

• in the general formula (10):
• Ar11, Ar12 and Ar13 independently represent a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, or a substituted or unsubstituted aralkyl group;
• M1 is a rare earth element ion;
• LG is a multidentate ligand coordinating with the rare earth element ion denoted by M1;
• m and n2 are arbitrary integers of equal to or greater than 1, wherein the multidentate ligand LG is a diketonato compound;
• the symbol “ . . . ” at the terminal of “M1(LG)m . . . ” represents a bond to a phosphine oxide group in another repeating unit;
• one or both of Ar11 and Ar13 are unsubstituted or respectively have at least one carboxyl group and have structures denoted by the following general formulae (11) and (12);
• n1 and n3 are arbitrary integers of equal to or greater than 1;
• the symbol “ . . . ” in “M1(LG)m . . . O═P” of the general formula (10) represents a bond between M1 and O═P, “ . . . ” in “−—COO− . . . M1(LG)n2” represents a bond between —COO− and M1;
• and
• the symbol “ . . . ” at the terminal of “M1(LG)n1-3” in the respective general formulae (10) to (12) represents a bond to a carboxyl group in another repeating unit;
• -Ar11-COO−. . . M1(LG)n1 (11)
• and
• -Ar13-COO− . . . M1(LG)n3 (12).