METHOD AND APPARATUS FOR DETECTING MOLECULAR OR IONIC SPECIES

摘要

A process and an apparatus for the detection of molecular or ionic species, comprising: (a) contacting a gaseous or liquid medium containing the species to be detected with a film comprising at least one monomolecular layer of amphiphilic compound chosen from among the tetracyanoquinodimethane (TCNQ) charge transfer complexes and the tetracyanoquinodimethane (TCNQ) salts, which conduct electricity or are precursors of electricity conducting charge transfer complexes and (b) determining the variation of one of the physical properties of the film. It is in particular possible to use layers of TCNQ alkyl-pyridinium, TCNQ alkyl-quinolinium, for detecting iodine, nitrogen oxides and fluoric compounds.