No abstract

The electronic transport characteristics of self-assembled monolayers of phenylene-based π-conjugated molecules were measured in a threeterminal device geometry. The short (∼1 nm) molecules were connected between two gold electrodes with a nearby Al 2 O 3 /Al gate electrode. It was possible to fabricate working devices using three of the five molecules investigated. The other two types of molecules led to devices where the Au electrodes were shorted together. Current−voltage characteristics as a function of the gate voltage are presented for the other three molecules. For some devices with 1,3-benzenedithiol, a weak gate effect was observed but no gating effect was observed for devices fabricated with the other molecules. The results are in strong contrast with those reported by Scho 1n et al.

subsequent dialkylation with NaH/DMF and KOtBuITHF, respectively. In the solid state (X-ray), compound 6 a adopts a flattened cone conformation, which is also found to be most abundant in CD,CN and CD,OD solution. Upon complexation with potassium picrate compound 6a was converted quantita-