Synthesis and spectroscopic properties of octasubstituted (phthalocyaninato)titanium(IV) complexes
摘要:
The octasubstituted (phthalocyaninato)titanium complexes [Pc'(R)(8)]TiO (Pc' = 2,3,9,10,16,17,23,24-octasubstituted phthalocyaninate; R = n-C7H15 (1), OC5H11 (2)) have been prepared by treating the corresponding substituted dicyanobenzenes C6H2(CN)(2)(R)(2) with TiCl4 or Ti(OC2H5)(4) in the presence of urea. Compound 1 reacts with catechol to give the catecholato complex [Pc'(C7H15)(8)]Ti(O2C6H4) (3). The electronic absorption spectra of 1 have been measured in a wide range of non-coordinating and coordinating solvents. The solvent effects are mainly due to solvation and the band positions depend on the polarity and coordinating power of the solvents. Aggregation has also been shown to exist for compound 1 in hexane, but not in chloroform.