Routes to some 3,6-disubstituted phthalonitriles and examples of phthalocyanines derived therefrom. An overview - Heeney, MJ; Al-Raqa, SA; Auger, A; Burnham, PM; Cammidge, AN; Chambrier, I; Cook, MJ (JOURNAL OF PORPHYRINS AND PHTHALOCYANINES, 2013)