Synthesis, structure and optical characterisation of silicon phthalocyanine bis-esters

摘要

A range of axially substituted silicon phthalocyanines has been synthesised using various carboxylates as the ligands.n4-tert-Butylbenzoic acid gives rigid, orthogonal axial substituents, whilst a thiophene-containing bis-acetate wasnconformationally more flexible. Varying the aromatic substituents of phenylacetic acids gave phthalocyanines withnaltered spectroscopic properties, and changes in the alkyl chain length between the phthalocyanine and the aromaticnnucleus of the ligand induced variations in the fluorescence lifetime and quantum yield. Three X-ray crystalnstructures of axially substituted silicon phthalocyanine bis-esters have been determined.