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Document Type

Original Study

Abstract

Azo dye ligand (DCPAC) namely (1E,6E)-4-((E)-(2,5-dichlorophenyl)diazenyl)-1,7- bis(4-hydroxy-3-methoxyphenyl)hepta-1,6-diene-3,5-dione was prepared by coupling diazonium salt of 2,5-dichloroaniline with curcumin in basic conditions. The ligand (DCPAC) and its Pd(II) complex were characterized by elemental analysis (C.H.N.), mass spectroscopy, 1H NMR, FT-IR, UV-Visible spectra, and molar conductivity. The molar ratio method was applied to ascertain the stoichiometric composition of pd(II) complex in aqueous solution which was 1:2 (metal ion to ligand). Azo curcumin ligand binding with Pd (II) ion used the enolate form moiety of curcumin under alkaline conditions which was observed by infrared spectra. New azo curcumin (DCPAC) and its Pd(II) complex have been evaluated as latent fingerprints detection.

Keywords

Curcumin; azo dye; latent fingerprints; coordination compound; palladium

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