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Paper | Regular issue | Vol 55, No. 3, 2001, pp.523-533
Published online, 1st January, 1970
DOI: 10.3987/COM-00-9130
Synthesis and Solution Behavior of Water-soluble Bis-porphyrins

Hisatsugu Okada,* Hiroyasu Imai, and Yoshio Uemori

*School of Pharmacy, Hokuriku University, 3-Ho, Kanagawa machi, Kanazawa 920-1181, Japan


A series of water-soluble bis-porphyrins in which two porphyrin (5-(2-amidophenyl)-10,15,20-tris(N-methyl-4-pyridiniumly)porphyrin) units were linked by a methylene chain with various lengths (-NHCO-(CH2)n-CONH-, n = 1, 3, 5, 7 and 11) were synthesized and characterized by UV-visible and 1H-NMR spectroscopy. The conformations of the bis-porphyrins in solution were estimated from calculation on the basis of their ring-current shifts. The self-association behavior of the bis-porphyrins in aqueous solution (at 25°C, pH 7.0, μ= 0.045) was also reported.