Dihedral-angle modulation of meso-meso-linked ZnII diporphyrin through diamine coordination and its application to reversible switching of excitation energy transfer

Hideyuki Shinmori, Tae Kyu Ahn, Hyun Sun Cho, Dongho Kim, Naoya Yoshida, Atsuhiro Osuka

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The dihedral angle between the two porphyrins in meso-meso-linked ZnII diporphyrin can be modulated effectively by adding 1,7-diaminoheptane, which coordinates at the both ZnII centers (see picture). This mechanical torsion gives rise to a decrease in the energy of the S1 state in the meso-meso-linked ZnII-diporphyrin subunit, and results in the change in direction of the energy transfer in the excited state. This process can be reversed by adding acetic acid.

Original languageEnglish
Pages (from-to)2754-2758
Number of pages5
JournalAngewandte Chemie - International Edition
Issue number24
Publication statusPublished - 2003 Jun 23


All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

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