Solid-state charge transfer promoted by an anchoring agent: A two-component analogue of Kofler's ternary complex

Abstract

Charge-transfer complex formation between the push-pull zwitterionic molecule 7,7-bis(piperazino)-8,8-dicyanoquinodimethane and picric acid is observed in the solid state. The critical role of proton transfer and intermolecular H bonding in facilitating the charge-transfer interaction is established through control experiments and single-crystal X-ray investigation of the complex. The details of the π-π interaction are analyzed using computed atomic charges.