Fabrication of a novel 1,3-bis(p-hydrazonobenzoicacid) indane langmuir-blodgett film and organic vapor sensing properties

Abstract

A novel 1,3-bis(p-hydrazonobenzoicacid)indane (HBI) molecule was synthesised for the study of monolayer properties at the air-water interface, the fabrication of a Langmuir-Blodgett film, and the investigation of organic vapor sensing properties. Langmuir properties of HBI were studied by taking an isotherm graph. Two different surface pressures were selected for the fabrication of multilayer LB films that were deposited onto glass and quartz crystal substrates. UV-vis spectroscopy and a quartz crystal microbalance (QCM) measurement system were employed to monitor the deposition quality under the two selected deposition pressures. Our results showed that a uniform and high quality LB film with a transfer ratio of 0.96 occurred using the HBI material at a deposition pressure of 22.5 mN m(-1). The LB film deposited onto the quartz crystal was used to study the interaction of the HBI material with different organic vapors such as chloroform, benzene, toluene, ethyl alcohol and isopropyl alcohol. Our results show that the HBI material is suitable to produce an organic thin LB film. Our results indicate that the HBI LB film is highly sensitive to chloroform vapor with a fast and reversible response. This new HBI material could be used as a vapor sensing material. (C) 2007 Elsevier B.V. All rights reserved.