✦ LIBER ✦

Supramolecular complexation of porphyrin and quinone with two coordination bonds and intramolecular electron transfer

✍ Scribed by Hiroshi Imahori; Koji Yamada; Eiichi Yoshizawa; Kiyoshi Hagiwara; Tadashi Okada; Yoshiteru Sakata

Publisher: John Wiley and Sons
Year: 1997
Tongue: English
Weight: 266 KB
Volume: 01
Category: Article
ISSN: 1088-4246
DOI: 10.1002/(sici)1099-1409(199701)1:1<55::aid-jpp6>3.0.co;2-3

No coin nor oath required. For personal study only.

✦ Synopsis

V-shaped zinc porphyrin dimer and quinone with two pyridyl groups have
been rationally designed and synthesized to assemble a porphyrin-quinone
supramolecule with two coordination bonds. Selective formation of the 1:1
bridging structure between the host-guest molecules was seen by
^1^ H NMR and UV-Vis absorption spectroscopy.
Molecular mechanics calculation suggests that the bridging structure has
rigidity as well as flexibility in geometry between the redox pair, which
supports the interpretation of ^1^ H NMR studies.
Intramolecular photoinduced electron transfer from the excited singlet state
of the porphyrin to the quinone was observed by steady-state fluorescence
spectra and picosecond fluorescence lifetime measurements.

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