Amphiphilic molecules D-σ-A (D = one-electron organic donor, σ = saturated linking bridge, A = good organic one-electron acceptor, such as TCNQ) form Pockels-Langmuir monolayers at the air-water interface, which can be transferred as Langmuir-Blodgett films onto solid substrates. Geometry-optimized MNDO calculations for some of these molecules provide the molecular size, and rough guides for the foreward and reverse rectification barriers. Fourier transform infrared spectra of monolayers by grazing-angle reflectance are reported. Crude rectification experiments gave negative results. A modified scanning tunneling microscope revealed that a single molecule of the (n-dodecyl)-aminophenyl-carbamate of 2-bromo-5-hydroxyethoxyTCNQ (BDDAP-C- BHTCNQ), transferred as part of a Langmuir-Blodgett monolayer onto a Au Ag mica surface, behaves as a rectifier of electrical current.