Spectroscopic Studies of the Simpler Porphyrins IV. The Absorption and Fluorescence Spectra of ms-Tetra(3′,4′-methylenedioxyphenyl)porphine of HCl Number Four and of Its AgC5H5N, Zn, and Ni Complex Salts

Abstract

The molecular absorption coefficients of ms-tetra(3′,4′-methylenedioxyphenyl)porphine and the AgC5H5N, Zn, and Ni complex salts have been measured over the visible region of the spectrum. The curves representing the absorption coefficients as a function of the wave-length are shown. The spectra of this porphyrin and its metal complex salts are quite similar to those of ms-tetraphenylporphine and its corresponding metal complex salts. The fluorescence spectra of these substances have also been studied. All four substances fluoresce in the red region of the visible spectrum. Curves showing relative intensity of fluorescence as a function of wave-length are shown for the parent substance and the Zn complex salt. The fluorescence of the AgC5H5N and Ni complex salts is so weak that intensity measurements could not be made.