Organized Langmuir−Blodgett Monolayers and Multilayers Based on Semiamphiphilic Binuclear Phthalocyanine: Structural and Photovoltaic Characteristics

• DOI: 10.1021/la980466j
• Publication Date: 2002-07-26T05:42:57Z
• Authors: Yan Jie Zhang; Lin Song Li; Jian Jin; Shimei Jiang; Yingying Zhao; Tie Jin Li; Xiguang Du; Shuqing Yang
• Keywords: 01 natural sciences; 0104 chemical sciences

A kind of water-soluble binuclear cobalt phthalocyaninesulfonate (bi-CoPc) was synthesized and used to prepare Langmuir−Blodgett (LB) films by the semiamphiphilic technique. On the bi-CoPc-containing subphase, monolayers were built up from the mixtures of octadecylamine (C18NH2) and methyl octadecanoate (OME). The surface pressure−area (π−A) isotherms indicated that C18NH2−OME molecules could form well-defined condensed-type monolayers. The monolayers of C18NH2:OME = 1:1 and 1:4 were deposited onto solid substrates (CaF2 and silicon substrates). Small-angle X-ray diffraction (XRD) patterns of C18NH2−OME/bi-CoPc LB multilayers indicated the formation of highly ordered multilayers in the vertical direction. The long spacings of LB multilayers were 5.94 and 5.11 nm for C18NH2:OME = 1:4 and 1:1, respectively. This suggested that in the LB multilayer of C18NH2:OME = 1:4 the hydrocarbon chains stood more vertically than that of 1:1. FTIR spectra confirmed the formation of the supermolecular assembly of C18NH2 a...