Improved syntheses of high hole mobility phthalocyanines: A case of steric assistance in the cyclo-oligomerisation of phthalonitriles

…, S Nanan, SL Warriner, BJ Whitaker

Index: Tate, Daniel J.; Anemian, Remi; Bushby, Richard J.; Nanan, Suwat; Warriner, Stuart L.; Whitaker, Benjamin J. Beilstein Journal of Organic Chemistry, 2012 , vol. 8, p. 120 - 128

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Citation Number: 14

Abstract

Abstract It has been shown that the base-initiated cyclo-oligomerisation of phthalonitriles is favoured by bulky α-substituents making it possible to obtain the metal-free phthalocyanine directly and in high yield. The phthalocyanine with eight α-isoheptyl substituents gives a high time-of-flight hole mobility of 0.14 cm 2· V− 1· s− 1 within the temperature range of the columnar hexagonal phase, that is 169–189 C.