期刊
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
卷 124, 期 34, 页码 10083-10090出版社
AMER CHEMICAL SOC
DOI: 10.1021/ja026312e
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Reaction of a Langmuir monolayer of an amphiphilic pentacyanoferrate(3+) complex with Ni2+ ions from the subphase results in the formation of a two-dimensional iron-nickel cyanide-bridged network at the air-water interface, The network can be transferred to various supports to form monolayer or multilayer lamellar films by the Langmuir-Blodgett (LB) technique. The same network does not form from homogeneous reaction conditions. Therefore, the results demonstrate the potential utility of an interface as a structure director in the assembly of low dimensional coordinate covalent network solids. Characterization of the LB film extended networks by X-ray photoelectron spectroscopy (XPS), FT-IR spectroscopy, SQUID magnetometry, X-ray absorption fine structure (XAFS), and grazing incidence synchrotron X-ray diffraction (GIXD) revealed a face-centered square grid structure with an average domain size of 3600 Angstrom(2). Magnetic measurements indicated that the network undergoes a transition to a ferromagnetic state below a T-c of 8 K.
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