What is the structural model proposed for the interaction between β-stannic acid and perchloric acid?

Label:chem

Topic
The study aims to understand the structural changes and interactions occurring when β-stannic acid is mixed with perchloric acid. Vibrational spectroscopy and X-ray diffraction analysis were used to investigate the resulting compounds.

From: "Vibrational and impedance analysis of the β-stannic acid samples plasticized by perchloric acid", Heliyon, Volume 8, Issue 11, November 2022, e11450
Answer
The proposed structural model suggests that the hydrated H⁺ and ClO₄⁻ ions from perchloric acid fill the pores/capillaries of β-stannic acid without significantly altering its microcrystalline structure. The interaction results in the formation of a gel-like adsorption compound with a variable composition, characterized by high proton conductivity and transparency at optimal ratios of reagents. This model explains the observed plasticization effect and the enhanced electrochemical properties of the material.
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