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Control of Dihedral Angle of Meso−Meso Linked Diporphyrins by Introducing Dioxymethylene Straps of Various Length

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journal contribution
posted on 31.08.2000, 00:00 by Naoya Yoshida, Atsuhiro Osuka
Meso−meso linked strapped diporphyrins Sn (n = 10, 8, 6, 4, 3, 2, and 1) were synthesized by intramolecular Ag(I)-promoted coupling of dioxymethylene-bridged diporphyrins Bn. With decrease of strap length, the absorption and fluorescence spectra and the one-electron oxidation potentials of Sn changed in a systematic manner, suggesting a progressive increase in electronic communication of two porphyrins.