Stability of complexes of Tb3+ with derivatives of N-acylaminobenzoic acids in water and organic solvents

Copolymers of N-alkylmethacrylamides with various isomers of N-methacryloyl aminobenzoic acid and their low-molecular-mass "models" were synthesized. T hese compounds were used to prepare complexes with Tb3+ ions in order to as sess the "polymer effect" on the intensity of luminescence and stability of these complexes in solution. The stability of the produced complexes was d etermined using a polymer competitor and studying evolution in the intensit y of luminescence of a complex solution during transition of Tb3+ ions from copolymer or "model" to the polymer competitor. The effects of the content of Tb3+ ions in solution, the structure of copolymer, and the isomer struc ture of N-acyl derivatives of aminobenzoic acid on the stability of the res ulting complexes were studied.