Preparation, solution behaviour and electrical properties of octasubstituted phthalocyaninato and 2,3-naphthalocyaninato oxotitanium(IV) complexes

Abstract

The octasubstituted oxo(phthalocyaninato)titanium(iv) complexes TiO[Pc′(CH2OC5H11)8 ] (Pc′=2,3,9,10,16,17,23,24-octasubstituted phthalocyaninate) and TiO[Pc″(OC4H9)8 ] (Pc″=1,4,8,11,15,18,22,25-octasubstituted phthalocyaninate) and the first 2,3,-naphthalocyaninato titanium complex TiO[Nc′(C6H13)8 ] (Nc′=2,5,11,14,20,23,29,32-octasubstituted naphthalocyaninate) have been prepared by treating the corresponding dicyano-benzenes or -naphthalene with titanium(iv) ethoxide and urea in n-pentanol. These compounds and their analogues TiO[Pc′(R)8 ] (R=C7H15 , OC5H11) tend to form molecular aggregates in solutions and the effects of solvent and concentration on their aggregation behaviour were investigated by UV–VIS and 1H NMR spectroscopy. The electrochemistry and electrical properties of these compounds were also studied.