Preliminary investigation of the use of charge transfer compounds as gas sensors

ABSTRACT

Some charge-transfer compounds namely tetrathiafulvaene Salt TTF [+] -tetracyariodiquinomethane TCNQ, tetrathiafulvaene chloride TTFCl, LiTCNQ, and TTF/oxanol dye have been investigated for use as gas sensors. Thin discs and films are tested for detecting some pollutant gases [SO[2], H[2]S, NO[2], CO, O[2], CH[4]], by considering changes in conductivity. It has been found that the conductance is decreased when SO[2], H[2]S, NO[2], Cl[2], CH[4] and O[2] gases pass over the surface of TTF/TCNQ. The same-trend has been noticed when little SO[2] and CO gases are adsorbed on the surface of LiTCNQ., TTFCl, TTF/TCNQ and TTF/DYE