Chemistry Letters p. 1749 - 1752 (1994)
Update date:2022-08-11
Topics:
Hayashi, Takashi
Miyahara, Takashi
Aoyama, Yasunori
Nonoguchi, Masanori
Ogoshi, Hisanobu
αααα-meso-Tetra(7-hydroxy-1-naphthyl)porphyrin (1) is prepared as a host molecule for ubiquinone analogue, 2,3,5,6-tetramethoxy-p-benzoquinone (2).The affinity and thermodynamic aspects in porphyrin 1 - quinone 2 pairing were determined by titrimetric measyrement of electronic absorption and fluorescence spectra.The binding constant of 1 for 2 at 298 K is obtained; Ka = 7.9*102 M-1 in toluene.The fashion of this porphyrin-quinone pairing was large different from that of previous host, αααα-meso-tetra(2-hydroxy-1-naphthyl)porphyrin (3), - quinone 2 pairing.
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