Hexagonal columnar porphyrin assembly by unique trimeric complexation of a porphyrin dimer with pi-pi stacking: remarkable thermal behavior in a solid |
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| Authors: | Uno Hidemitsu Masumoto Akane Ono Noboru |
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| Affiliation: | Division of Synthesis and Analysis, Department of Molecular Science, Integrated Center for Sciences, Ehime University, and CREST, Japan Science Technology Corporation, Matsuyama 790-8577, Japan. uno@dpc.ehime-u.ac.jp |
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| Abstract: | On heating, syn-diporphyrin zinc complexes fused with bis(ethano)dimethoxyanthracene, the crystal structure of which showed a unique trimeric assembly, extruded one ethylene molecule at 240-310 degrees C to give a porphyrin-naphthoporphyrin diad, and the second retro-Diels-Alder reaction and concomitant decomposition of the methoxy groups occurred at 280-350 degrees C to give the anthraquinone-fused diporphyrin, while the first thermal conversion of the anti-diporphyrin zinc complex occurred in a much lower temperature range (180-230 degrees C). |
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