The following is an abstract for the selected article. A PDF download of the full text of this article is available here. Members may download full texts at no charge. Non-members may be charged a small fee for certain articles.
Europium Bisphthalocyanine-NO2 Interactions in Monolayers: Spectroscopic and Electrical Measurements
Volume 51, Number 10 (Oct. 1997) Page 1525-1530
Berno, Bob; Nazri, Abbas; Aroca, Ricardo
The electronic and surface-enhanced resonant Raman spectra of europium bisphthalocyanine (EuPc2) are used to monitor the adsorption of NO2 onto EuPc2 Langmuir-Blodgett (LB) monolayer films. The reaction was also monitored in solution, and the complex formed was studied by electron paramagnetic resonance (EPR) spectroscopy. Conductivity measurements of the LB film have shown a two-stage process due to exposure to NO2 gas: adsorption on the surface, and absorption into the film. After a complete desorption by annealing, film conductivity rises continuously with time of exposure to gas to a saturation point. EPR measurements suggest that the EuPc2 structure is irreversibly changed by the material gas interaction, although the adsorption is reversible.