Synthesis, Spectral and Electrochemical Investigation of Azo-Bridged Metallophthalocyanine Polymer

Title compounds were synthesized by a very simple method by the polymer condensation of the tetracarboxylic metal phthalocyanine with 4–[(Z)Phenyldiazenyl benzene–1,3-diol]. The Proposed method is an excellent method for the synthesis for azo-bridged coupling polymer phthalocyanine. This complex shows very good solubility in many organic solvents like ethanol, THF, DMF and DMSO. The synthesized compounds were subjected for radical scavenging ability using 2, 2-diphenyl-1-picrylhydrazyl (DPPH) and using standard Butylated hydroxyanisole. The compound (4) shows the best scavenging ability among the other tested compound compared to the standard. The electrochemical redox property of the azo-bridged polymer of tetracarboxylic copper phthalocyanine was explored using GCE in buffer solution (pH 4.0). Using Amperometry technique a highly selective and simultaneous determination of DA and AA has been explored at the modified GCE. Amperometric peak currents of dopamine and Ascorbic acid increased linearly with their concentration at the range of 2 μM to 140 μmol L−1 and 0.5 to 400 μmol L−1, with LOD 0.66 μM/L and 0.165 μM/L and slope was 03 μAμM-1 and 8.833 μAμM-1 with a correlation coefficient of 0.9998 and 0.9953. No significant interference for the determination of ascorbic acid and dopamine was detected at 0.4 V during an addition of various compounds.