一种噻吩基双偶极半菁与普鲁士蓝的静电自组装薄膜

doi:10.3866/PKU.WHXB20110313

Abstract

Abstract:

We successfully prepared a novel inorganic-organic hybrid electrostatically self-assembled multilayer film by alternately depositing Prussian blue (PB) and a thiophene-containing hemicyanine. The optical, electrochemical, and photoelectrochemical properties of the as-prepared films were studied by UV-visible absorption spectroscopy, cyclic voltammetry, and photoelectrochemical experiment. Linear increases in the absorbances at 376 and 698 nm with the number of deposited layers, up to at least 8 layers, indicated that film deposition was uniform and reproducible. The PB in the prepared films was found to occur surface-confined rather than diffusion-controlled redox reactions and the peak currents increased with an increase in the number of layers up to 5 layers. Upon irradiation with 100 mW·cm^-2 white light the films exhibited stable and reproducible cathodic photocurrents, which increased as the number of layers increased up to 4 layers. A maximum photocurrent density of 0.28 μA·cm^-2 was found for the four-layer film at a bias voltage of -0.4 V vs the saturated calomel electrode.

Key words: Hemicyanine, Self-assembled film, Cyclic voltammetry, UV-visible spectrum, Thiophene, Photoelectrochemical property

WANG Zhi-Ping, LUO Hong, GAO Li-Hua, WANG Ke-Zhi. Electrostatically Self-Assembled Films Prepared Using Bipolar Thiophene Hemicyanine and Prussian Blue[J]. Acta Phys. -Chim. Sin. 2011, 27(03), 754-758. doi: 10.3866/PKU.WHXB20110313

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Electrostatically Self-Assembled Films Prepared Using Bipolar Thiophene Hemicyanine and Prussian Blue

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