Electrochemiluminescence of 3,4,9,10-perylenetetracarboxylic acid/oxamic hydrazide and its application in the detection of tannic acid.

Perylene and its derivatives are often used in many analytical fields, but its electrochemiluminescence (ECL) behavior has been rarely reported. Here, a novel anodic ECL of 3,4,9,10-perylenetetracarboxylic acid (PTCA)/oxamic hydrazide (OHZ) has been investigated for the first time with OHZ as the coreactant. The mechanism of the PTCA/OHZ ECL system is discussed. This ECL system enables the detection of OHZ with a linear range from 0.0626 to 312.5 μM and a detection limit of 21 nM (S/N = 3). Moreover, a highly sensitive method for tannic acid determination has been developed based on the effective quenching of PTCA/OHZ ECL by tannic acid. The proposed method shows a linear range of 0.05-320 μM with the limit of detection at 5 nM for tannic acid (S/N = 3). This study indicates that PTCA/OHZ shows great potential for application in ECL analysis as a new low-cost ECL system.