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

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 H-1 NMR spectroscopy. The electrochemistry and electrical properties of these compounds were also studied.