Issue 5, 2002

Abstract

A highly ordered multilayer film was formed by casting chloroform solutions of an ionic complex between a dimethyldioctadecylammonium (DODA) and a phosphomolybdate anion PMo12O403− (PMo12) on a glassy carbon electrode and solid substrates (CaF2, quartz, and borosilicate glass). A well-ordered lamellar superlattice structure was identified by X-ray diffraction (XRD) and differential scanning calorimetry (DSC) experiments. IR spectra showed that the Keggin structure of the phosphomolybdate anion is preserved in the composite film. The superlattice film showed good photochromic and electrochemical properties. Irradiated with UV light, the transparent film changed from colorless to blue. Then, bleaching occurred when the film was in contact with ambient air or O2 in the dark. A possible photochromic mechanism was proposed according to electron paramagnetic resonance (EPR), Fourier transform infrared spectra (FTIR), UV–vis spectra, and related literature. The electrochemical behavior of the composite film was also examined by cyclic voltammetry in detail.

Graphical abstract: Self-assembled organic–inorganic composite superlattice thin films incorporating photo- and electro-chemically active phosphomolybdate anion

Article information

Article type
Paper
Submitted
29 Oct 2001
Accepted
20 Feb 2002
First published
08 Mar 2002

J. Mater. Chem., 2002,12, 1453-1458

Self-assembled organic–inorganic composite superlattice thin films incorporating photo- and electro-chemically active phosphomolybdate anion

T. R. Zhang, W. Feng, Y. Q. Fu, R. Lu, C. Y. Bao, X. T. Zhang, B. Zhao, C. Q. Sun, T. J. Li, Y. Y. Zhao and J. N. Yao, J. Mater. Chem., 2002, 12, 1453 DOI: 10.1039/B109825J

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