A Large Dendritic Multiporphyrin Array as a Mimic of the Bacterial Light-Harvesting Antenna Complex: Molecular Design of an Efficient Energy Funnel for Visible Photons

Myung-Seok Choi; Takuzo Aida; Tomoko Yamazaki; Iwao Yamazaki

doi:10.1002/1521-3773(20010903)40:17<3194::AID-ANIE3194>3.0.CO;2-5

A Large Dendritic Multiporphyrin Array as a Mimic of the Bacterial Light-Harvesting Antenna Complex: Molecular Design of an Efficient Energy Funnel for Visible Photons

Angew Chem Int Ed Engl. 2001 Sep 3;40(17):3194-3198. doi: 10.1002/1521-3773(20010903)40:17<3194::AID-ANIE3194>3.0.CO;2-5.

Authors

Myung-Seok Choi¹, Takuzo Aida¹, Tomoko Yamazaki², Iwao Yamazaki²

Affiliations

¹ ERATO Nanospace Project Japan Science and Technology Corporation (JST) Department of Chemistry and Biotechnology Graduate School of Engineering, The University of Tokyo 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656 (Japan) Fax: (+81) 3-5841-7310.
² Department of Chemical Process Engineering Graduate School of Engineering Hokkaido University Kita-13-Nishi-8, Kita-ku, Sapporo 060-8628 (Japan).

PMID: 29712040
DOI: 10.1002/1521-3773(20010903)40:17<3194::AID-ANIE3194>3.0.CO;2-5

Abstract

π-Electronic conjugation is not necessary to facilitate long-range energy migration and transfer: A rapid (k_ENT =1.04×10⁹ s^-1 ) and efficient (Φ_EXT =71 %) energy transfer from the 28 photoexcited zinc porphyrin units to the focal free-base porphyrin unit occurs in a large, star-shaped dendritic multiporphyrin array in which the chromophore units are linked through flexible ether groups.

Keywords: dendrimers; energy transfer; fluorescence spectroscopy; photosynthesis; porphyrinoids.