Medium Diradical Character, Small Hole and Electron Reorganization Energies and Ambipolar Transistors in Difluorenoheteroles

Four difluorenoheteroles having a central quinoidal core with the heteroring varying as furan, thiophene, its dioxide derivative and pyrrole have shown to be medium character diradicals. Solid-state structures, optical, photophysical, magnetic, electrochemical properties been discussed in terms of diradical character, variation aromatic captodative effects (electron affinity). Organic field-effect transistors (OFETs) prepared, showing balanced hole electron mobilities order 10−3 cm2 V−1 s−1 or ambipolar charge transport which is first inferred from their redox amphoterism. Quantum chemical calculations show that electrical behavior originated produces similar reorganization energies for transports. The vision simultaneously bearing pseudo-hole pseudo-electron defects might justify reduced values both regimes. Structure-function relationships between are revealed.