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Energy Storage by Poly(o-anisidine) Matrix During Oxidative Hydrolysis

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Abstract

The chromaticity of poly(o-anisidine) (POAN) doped with different acids (HA), HA-doped POAN, has been studied by the spectrophotometric technique and the results were substantiated by molecular mechanics (MM+) calculations. The observed absorbance decrease (λ around 720 nm, dark green coloration) with increasing concentration of the inorganic oxidizing agent (KMnO4) can be attributed to the oxidative hydrolysis mechanism. The oxidative hydrolysis constant (K h) is highly dependent on the strength of the acid used. The HClO4-doped POAN matrix has the ability to store about 128.878 kJ⋅g−1 chromogenic energy (CE) at the wavelength 720 nm in a condensed lightweight form. MM+ calculations suggest that the potential energy (PE) in kJ⋅mol−1 of the optimum molecular geometric (OMG) structure of the HClO4-doped POAN matrix is at least two (2.052) times more stable than the OMG of the base form (POAN-EB) of the POAN matrix. Kinetic parameters of the oxidative hydrolysis reaction of the HA-doped POAN matrix were deduced from absorbance variations with time. The results of computer-oriented kinetic analysis indicate that the rate-controlling step for HA-doped POAN oxidative hydrolysis is governed by the Ginstling-Bronshein equation that represents three-dimensional diffusion (D4). Activation parameters for the oxidative hydrolysis of the HClO4-doped POAN matrix were computed and discussed.

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  1. Chemistry Department, Faculty of Science, Assiut University, 71516, Assiut, Egypt

    Seddique M. Ahmed

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Ahmed, S.M. Energy Storage by Poly(o-anisidine) Matrix During Oxidative Hydrolysis. J Solution Chem 37, 919–932 (2008). https://doi.org/10.1007/s10953-008-9286-y

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  • DOI: https://doi.org/10.1007/s10953-008-9286-y

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