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Issue 5, 2002
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Self-assembled organic–inorganic composite superlattice thin films incorporating photo- and electro-chemically active phosphomolybdate anion

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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

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Publication details

The article was received on 29 Oct 2001, accepted on 20 Feb 2002 and first published on 08 Mar 2002


Article type: Paper
DOI: 10.1039/B109825J
Citation: J. Mater. Chem., 2002,12, 1453-1458
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    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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