Concerning meso-tetraphenylporphyrin purification

Abstract

Treatment of crude meso-tetraphenylporphyrin with 2.3-dichloro-5.6-dicyanobenzoquinone affords a high recovery of ' chlorin-free ' meso-tetraphenylporphyrin (1 ), the excess of quinone and its transformation products being easily removed by adsorption on alumina. This new procedure is also applied to the purification of mesotetraphenylporphyrin metal complexes.1mSO-TETRAPHENYLPORPHYRIN (TPP) (1) has been extensively employed for investigation of the physical and spectroscopic properties of the porphyrin macrocycle and its diverse metal complexes.2 This fact can be related directly to the ease with which TPP can be pre-

Active site topology of artificial peroxidase‐like hemoproteins based on antibodies constructed from a specifically designed ortho‐carboxy‐substituted tetraarylporphyrin

“…meso-Tetraphenylchlorin was removed by treatment with 2,3-dichloro-5,6-dicyano-benzoquinone according to the method of Smith et al [34]. Fe and Mn insertion were done as described previously [35,36].…”

Effect of Substitution on the ESR Spectra and Electronic Ground State of ZnTPP Cation Radicals

“…Synthesis: Zinc(II) tetraphenylporphyrin and its derivatives were prepared following the procedure of Adler et al [39] Purification of the porphyrins was carried out by following the method of Barnett et al [40] The π-cation radicals were generated by chemical oxidation of deoxygenated CH 2 Cl 2 solutions of metalloporphyrins with 0.5 equivalents of bromine in carbon tetrachloride. [33] The complexes were characterised by various physico-chemical techniques such as elemental analysis, UV/Visible, FT-IR, FT NMR, and ESR spectroscopy, and electrochemistry.…”

The manganese complex of 2,3,7,8,12,13,17,18-octaphenylporphyrin as epoxidation catalyst

“…Meso-tetraphenylporphyrin (1) was prepared by the Rothemund-Adler method [12] and purified following an established procedure [13]. The 1,2,3,4,5,6,7,8-octaphenylporphyrin (2) was synthesised by the method of Friedman [14] and the 1,4,5,8-tetramethyl-2,3,6,7-tetraethylporphyrin (3) was synthesised by the procedure described by Rose et al [15].…”

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ABSTRACT: The 2,3,7,8,12,13,17,18-octaphenylporphyrinato manganese(III) chloride was prepared and its behaviour as epoxidation catalyst was studied. The role of the phenyl substituents in the ß-pyrrolic positions concerning the stability of the catalyst to the reaction conditions and the efficiency and selectivity of the oxidations was accessed in a comparative study with MnTPP and MnEtio II.

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