New alkaline media-soluble functional zinc(II) phthalocyanines bearing poly (hydroxylmethyl)iminomethane Schiff base complexes in catalytic bleaching

This comparative study is based on the preparation of Bis[bis(tris(hydroxymethyl)iminomethane-phenoxy)manganese(III)]phthalocyaninato zinc(II) (3) and Bis[bis(tris(hydroxymethyl)iminomethane-phenoxy) cobalt(III)] phthalocyaninato zinc(II) (4) as the tri-nuclear complexes consist of two Schiff base complexes substituted Zn-Phthalocyanine for bleach catalysis. Complexion on the periphery to obtain the complex (3–4) has been performed through the reaction of the Schiff base substituted phthalocyanine tetrakis [tris(hydroxymethyl)iminomethane-phenoxy] phthalocyaninato zinc(II) (2) by using MnCl2. 4H2O and CoCl2·6H2O salts in basic condition in DMF. FT-IR, 1H NMR, 13C NMR, UV–vis, ICP-OES and MS spectra were applied to characterize the prepared compounds. The bleaching performances of the prepared phthalocyanine compounds (3–4) were examined by the degradation of Morin as hydrophilic dye characterizes the wine stains. The degradation progress in the presence of catalysts (3–4)/H2O2 combination in aqueous solution buffered with Na2CO3 to provide the detergent characteristic has been investigated using online spectrophotometric method (OSM). It was found that the prepared catalysts exhibited better bleaching performance at 25 °C than to that of tetraacetylethylenediamine (TAED) as bleach activator commercially used in powder detergent formulations.

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