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 meso-tetraphenylporphyrin metal complexes.
G. H. Barnett, M. F. Hudson and K. M. Smith, J. Chem. Soc., Perkin Trans. 1, 1975, 1401 DOI: 10.1039/P19750001401
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