Non-Peripheral Tetrahexyl-Substituted Vanadyl Phthalocyanines with Intermolecular Cofacial π-π Stacking for Solution-Processed Organic Field-Effect Transistors

Four structural isomers of non-peripheral tetrahexyl-substituted vanadyl phthalocyanine can be easily separated using common laboratory column chromatography on a gram scale. The most abundant isomer, 1,8,18,22-tetrahexyl vanadyl phthalocyanine (I-3), adopts intermolecular 2D cofacial pi-pi stacking and exhibits a field-effect mobility of up to 0.13 cm(2) V(-1) s(-1).