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    Octabultoxy 2,3-naphthalocyanine cobalt(II) ultrathin film: preparation, characterization and gas-sensing properties

    Year: 2004

    Journal: Sensors and Actuators B 97 (2004) 319-323, 20111221

    Authors: S. Gao, H. Zhaoa,, L.H. Huoa,, J.G. Zhaoa,, Y.Q. Wu , S.Q. Xi

    Organizations: a College of Chemistry and Chemical Technology, Heilongjiang University, Harbin 150080, China b Laboratory of Rare Earth Chemistry and Physics, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

    The title complex octabultoxy 2,3-naphthalocyanine cobalt(II) (CoNc(OC4H9)8) was synthesized, and the stable Langmuir monolayer was obtained on the pure water surface. The deposition process of the Langmuir-Blodgett (LB) film was investigated. The structure of complex CoNc(OC4H9)8 and its multilayers were characterized by IR and electronic spectra. The results showed that the naphthalocyanine LB film could be well transferred onto the substrates, while the surface of the multilayerswas partially oxidized by air. The naphthalocyanine molecule packed as J-aggregate in the film with one-dimensional order along the multilayer deposition direction. The sensing experiment indicated that the LB film was sensitive to NH3 (30-50 ppm) and C2H5OH (5-25 ppm) at room temperature. The response and recovery time to 120 ppm NH3 is just 15 and 50 s, respectively.