title: Improved syntheses of high hole mobility phthalocyanines: A case of steric assistance in the cyclo-oligomerisation of phthalonitriles.
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.
authors.affiliation: Centre for Molecular Nanoscience (CMNS), University of Leeds, Woodhouse Lane, Leeds, LS2 9JT, United Kingdom.
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Tate
authors.forename: Rémi
authors.initials: R
authors.lastname: Anémian
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Bushby
authors.forename: Suwat
authors.initials: S
authors.lastname: Nanan
authors.forename: Stuart L
authors.initials: SL
authors.lastname: Warriner
authors.forename: And Benjamin J
authors.initials: AB
authors.lastname: Whitaker