Patent ID: 7297690

Claim:
A luminescent lanthanide complex comprising a lanthanide and a substituted 2-quinolinol having a sensor group and a complex group on any two of the positions 3-8 in the 2-quinolinol represented by the formula wherein the sensor group is represented by the formula —C n H 2(n-m) —(C 6 H 5-o )(—NR 1 R 2 ) o wherein n is an integer of 1-5, m is an integer of 0-2 and smaller than n-1, o is 1 or 2, R 1 represents H, alkyl, —COX (wherein X represents alkyl or peptide) or —CH 2 CH 2 (NYCH 2 CH 2 ) p NY 2 (wherein Y independently represents H, alykyl or a group having the formula and p represents an integer of 0-3, and R 2 represents H or alkyl—), said lanthanide ion is complex bonded to said complex group, and the molar ratio of said substituted 2-quinolinol: said lanthanide is 1:0.9 to 1.1.