Structure and physical properties of isopropyl TTF semisquarates

Abstract

The synthesis, characterization and physical properties of two isopropyl TTF semisquarates, TTFsqⁱPr and EDT-TTFsqⁱPr, are reported. These molecules show a solvatochromism effect in solution and electrical conductivity in the solid state in their neutral form. These behaviors can be explained in terms of a small electrical charge redistribution from the TTF-centered HOMO to the semisquarate-centered LUMO of the molecules.