Abstract
Pyridine-2-carbaldehyde semicarbazone ligand (HL) reacts with copper(II) sulphate in water solution to yield the coordination polymer [{Cu II(HL)(H 2O)(SO 4)} n ] (1). The crystals are triclinic with space group P(−1) and the metal ion is occupying a distorted octahedral geometry. EPR results show that a dynamic Jahn–Teller (J–T) effect is operative in water solutions and also support the stability of the polymeric chains as they continue to show a characteristic half-field Δ m S = ±2 transitions. UV–visible spectrum analysis allowed access to the J–T stabilization energy of 5995 cm −1 in water. Thermogravimetric/differential thermal analysis curves showed a step-by-step decomposition of complex 1 with loss of water, release of SO 3 and oxidation of the semicarbazone ligand in the 30–422 °C range.
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