Europium bisphthalocyanine LB films for gas sensibility and selectivity

Gas-sensing properties of Europium bisphthalocyanine LB films for NH3, NOx (x = 1,2) and Cl-2 were investigated. No responses were observed when EuPc' (2) LB films were exposed to 50 ppm NH3 and NOx (x = 1, 2), respectively. E uPc'(2) LB films were found to produce a very fast response when exposed to Cl-2, even at the 2 ppm level. At low-concentration levels (up to similar to 80 ppm), the conductivity changes linearly with the concentrations of Cl -2. The electronic spectroscopic characterization of the LB films is also g iven. (C) 1998 Elsevier Science Limited. All rights reserved.