Characterization of manganese tetraarylthiosubstituted phthalocyanines self assembled monolayers

Manganese tetraarylthiosubstituted phthalocyanines (complexes 1-5) have been deposited on Au electrode surfaces through the self assembled monolayer (SAM) technique. SAM characteristics reported in this work are: ion barrier factor (∼1); interfacial capacitance (303-539 μF cm-2) and surface coverage (1.06 x 10-10-2.80 x 10-10 mol cm-2). Atomic force microscopy was employed in characterizing a SAM. SAMs of complexes 1-5 were employed to detect L-cysteine (with limit of detection ranging from 2.83 x 10-7 to 3.14 x 10-7 M at potentials of 0.68-0.75 V vs. Ag|AgCl) and nitrite (limit of detection ranging from 1.78 x 10-7 to 3.02 x 10-7 M at potentials of 0.69-0.76 V vs. Ag|AgCl).