Synthese von Metallkomplexen des Tetra-(2,3-anthra)-tetraazaporphins und Vergleich ihrer Elektronenabsorptionsspektren mit denen anderer anellierter Tetraazaporphinsysteme

Copper, nickel and aluminium derivatives of tetra-2,3-anthratetraazaporphin bearing different substituents in the anthracen part have been prepared. The absorption spectra of these substances in different solvents are given and compared with metal complexes of other linearly annellated tetraazaporphins. In the series of vanadyl complexes of tetraazaporphin (_max 597 nm), tetra-[1,2-(4-tert-butyl)-benzo]-tetraazaporphin (_max 698 nm), tetra-[2,3-(6-tert-butyl)-naphtho]-tetraazaporphin (_max 807 nm), tetra-2,3-(anthra)-tetraazaporphin (_max 932 nm), tetra-2,3-(tetraceno)-tetraazaporphin (_max 1055 nm), the absorption maxima of the Q-band are shifted per annellated benzene ring about 100 nm to longer wave lengths.