Binding properties of coumarin phthalonitrile derivatives in methanol

Abstract

The complexation properties of coumarin phthalonitrile derivatives 1-3, towards some transition, heavy and lanthanide metal cations have been investigated in methanol by means of UV spectrophotometry and conductivity experiments. The stoichiometries of the complexes formed and their stability constants were resolved by digital processing of data. A binuclear M2L (M = Metal, L = Ligand) species were formed and the profiles of affinity of ligands 1-3 towards transition metal cations illustrate their selectivity towards Cu 2+ .

Complexation and Extraction of Transition Metal Cations by New Azodyes: Synthesis, Structure Elucidation and Binding Properties

“…2 makes in evidence the increase of complex stabilities in favour of copper. These results are in agreement with with some coumarine phthalonitrile derivatives in both acetonitrile and methanol [27,28].…”