Synthesis of meso-azulenylporphyrins.
[reaction: see text] meso-Azulenylporphyrins 1-4 were prepared by Suzuki-Miyaura coupling or the Ziegler-Hafner method. 1-Azulenyl and 6-azulenyl groups are indeed acting as electron-donating and electron-accepting substituents toward Zn(II) porphyrin. Fluorescence of Zn(II) porphyrin in the dyads is strongly quenched depending upon substitution position of azulene in order of 2 > 1 > 4 > 3.
Kurotobi
Kei
K
Department of Chemistry, Graduate School of Science, Kyoto University, and CREST (Core Research for Evolutional Science and Technology) of Japan Science and Technology Agency (JST), Sakyo-ku, Kyoto 606-8502, Japan.
Osuka
Atsuhiro
A