LAURA CHIRILA, ROMEN BUTNARU, ION SANDU, VIORICA VASILACHE, ANDREI VICTOR SANDU<br>Synthesis and Characterization of Some New Premetalated Dyes Based on Cu(II)

LAURA CHIRILA, ROMEN BUTNARU, ION SANDU, VIORICA VASILACHE, ANDREI VICTOR SANDU
Synthesis and Characterization of Some New Premetalated Dyes Based on Cu(II)

Abstract:

The new complex combinations on Cu(II) were synthesized, using sodium salts of disulphonic acids as ligands: sodium(E)-2-((1-hydroxy-4-sulfonatonaphtalen-2-yl)diazenyl)-6-methoxybenzo[d]thiazole and sodium(E)-2-((2-hydroxy-6-sulfonatonaphtalen-1-yl)diazenyl)-6-methoxybenzo[d]thiazole, both having the group -6-methoxibenzo[d]tiazol sulphonated in 5 and 7 positions, mixed in both isomeric forms, denominated in this work as HL1 and respectively HL2 ligand. The aqueous insoluble complexes, obtained by precipitation from the interaction of the two ligands with Cu2+ ion, were previously dried till constant mass at 105oC and then characterized by: chemical elemental analysis (Cu, C, H, N, S şi Na), FTIR, SEM-EDX, XRD and thermal analysis in dynamic system. Their crystalline structure was investigated by electronic microscopy and X- ray difraction and the thermal derivatogrames revealed their stability till 150oC. The studies show that Cu(II) central atoms are tetracoordinated with square plan (dsp2 hybridization) and respectively tetrahedral structures (hybridization sp3), corresponding to the two types of ligands, HL1 for Td geometry and HL2 for the D4h and corespond to the following molecular formulae: [Cu(C18H10N3S3O8Na2)(H2O)Cl]·2HCl and [Cu(C18H10N3S3O8Na2)2]·4HCl. These complexes were synthesized for applications in wool fibers dyeing processes, having the advantage of reduced toxicity compared with other commonly used complexes . Keywords: premetalated dyes, organic ligands, SEM-EDX, FTIR, XRD, thermal derivatographic

Issue: 2011, Volume 62, Issue 3

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