Preparation of Langmuir-Blodgett films containing a charge-transfer complex of alkylated dicyanoquinonediimine (DCNQI) and copper

An alkylated N,N'-dicyanoquinonediimine (alkylDCNQI) derivative has been synthesized and the Langmuir-Blodgett (LB) technique has been applied to this material and its mixture with CuI, aiming at the construction of a DCNQI-Cu system in two dimensions. No chemical reaction could be detected for alkylDCNQI-CuI mixed solutions. However, optical measurements have shown that the LB films obtained from the mixture contain a partially reduced DCNQI group, suggesting that a new CT complex is obtained by in situ reaction of alkylDCNQI and CuI at the air-water interface.