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20π Nonaromatic Porphycene
T. Matsuo, K. Ito, N. Kanehisa, T. Hayashi*
Osaka University, Japan
23 January 2008 (online)
While they are well known in their role as building blocks in supramolecules, porphyrin and its derivatives are also interesting substrates for molecular electronics. In most cases, however, porphyrins and porphyrinoids are aromatic with 18π conjugation. 20π-Conjugated porphyrinoids readily undergo oxidation in air to establish 18π arrangement. The authors report on preparing the air-stable 20π-conjugated nonaromatic porphyrin derivative 1, which is a notable achievement.