Synthesis of chlorophyll-BODIPY conjugates and their intramolecular excitation energy transfer

DOI Web Site 参考文献34件
  • Yuna Mori
    Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
  • Yugo Nakamura
    Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
  • Mizuki Yasui
    Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan
  • Hitoshi Tamiaki
    Graduate School of Life Sciences, Ritsumeikan University, Kusatsu, Shiga 525-8577, Japan

説明

<jats:p>Zinc 3-hydroxymethyl-pyropheophorbides-[Formula: see text] covalently linked with an 8-aryl-1,3,5,7-tetramethyl-BODIPY moiety in the 17-substituent were synthesized by chemically modifying naturally occurring chlorophyll(Chl)-[Formula: see text]. The synthetic Chl–BODIPY conjugates in tetrahydrofuran exhibited sharp visible absorption and weak circular dichroism spectra, indicating that their molecules were fully dispersed in the solution. In their ground states, no intramolecular interaction between the Chl and BODIPY parts was observed. By contrast, singlet excitation energy was efficiently transferred from the photoexcited BODIPY moiety to zinc chlorin moiety within their molecules. The intramolecular energy transfer efficiencies exceeded 90% and were independent of the linkages including ester and amide bonds as well as methylene and hexamethylene spacers.</jats:p>

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