UV light and red light chemistry of metallophthalocyanine: wavelength-dependent photochemical reduction of tetrasodium salts of Zn(II) and Cu(II) tetrasulphonatophthalocyanines with amines

摘要: Abstract Irradiation of tetrasodium salts zinc(II) (Na + 4 ZnPcS 4− ) and copper(II) CuPcS tetrasulphonatophthalocyanine in the presence triethanolamine, triethylamine or ethylenediaminetetraacetic acid degassed aqueous acetonitrile (1:1 by volume) with red light at 656 nm exciting their Q band did not induce any reaction but that UV 365 Soret led to reduction. The reciprocal quantum yields for photoreduction on excitation increased increasing concentration amines. mechanism was discussed participation a higher excited state phthalocyanines suggested.