Copper complexes with polydentate hetarylformazanylcelluloses

Copper complexes with polydentate irregular 1-aryl-5-heterylformazan-6-celluloses were synthesized (aryl is phenyl, 2-hydroxy-4-nitrophenyl, 2-hydroxy-5-nitrophenyl, 2-hydroxy-4-chloro-5-nitrophenyl, 2-hydroxy-4-nitro-5-chlorophenyl, 2-carboxyphenyl, 4-sulfophenyl; heteryl is 4-methyl-6-methoxypyrimidin-2-yl, 4,6-dimethylpyrimidin-2-yl, 4-methyl-1,6-dihydro-1H-6-oxopyrimidin-2-yl, benzoxazol-2-yl, benzothiazol-2-yl). The structures of the complexes were determined by EPR. The relationship between the static exchange capacity in terms of Cu²⁺ and the number of formazan groups in the matrix, which is 0.1–0.3 mM/g for hetarylformazancelluloses, was established.