Nanostructured Thin Films Obtained from Fischer Aminocarbene Complexes
Year: 2016
Journal: Materials
Authors: Lazo-Jimenez, RE; Ortega-Alfaro, MC; Lopez-Cortes, JG; Alvarez-Toledano, C; Chavez-Carvayar, JA; Ignes-Mullol, J; Gonzalez-Torres, M; Carreon-Castro, P
The synthesis of four amphiphilic organometallic complexes with the general formula RC = M(CO)(5)NH(CH2)(15)CH3, where R is a ferrocenyl 2(a-b) or a phenyl 4(a-b) group as a donor moiety and a Fischer carbene of chromium (0) or tungsten (0) as an acceptor group, are reported. These four push-pull systems formed Langmuir (L) monolayers at the air-water interface, which were characterized by isotherms of surface pressure versus molecular area and compression/expansion cycles (hysteresis curves); Brewster angle microscopic images were also obtained. By using the Langmuir-Blodgett (LB) method, molecular monolayers were transferred onto glass substrates forming Z-type multilayers. LB films were characterized through ultraviolet-visible spectroscopy, atomic force microscopy and X-ray diffraction techniques. Results indicated that films obtained from 2b complex [(Ferrocenyl)(hexadecylamine)methylidene] pentacarbonyl tungsten (0) are the most stable and homogeneous; due to their properties, these materials may be incorporated into organic electronic devices.
