Substitution of spreading solvent by a less hazardous one for the fabrication of the Au(dmit)2 Langmuir–Blodgett films

The Langmuir–Blodgett (LB) film based on the ditetradecyldimethylammonium–Au(dmit)2 [2C14N+Me2–Au(dmit)2] salt shows a high room-temperature conductivity of 40 S/cm with a metallic temperature dependence. However, the solvent for spreading the material at the air/water interface is a mixture of benzene and acetonitrile, which should be substituted by a less hazardous solvent considering the health effects. Here, we report on the substitution of the solvent by a less hazardous one — a mixture of toluene and acetone; the 2C14N+Me2–Au(dmit)2 LB film fabricated using the mixture also exhibits a high room-temperature conductivity together with a metallic temperature dependence.