Synthesis and properties of fullerene (C70) complexes of 2,6-bis(porphyrin)-substituted pyrazine derivatives bound to a Pd(II) ion

Yusaku Eda, Kennosuke Itoh, Yoshio N. Ito, Mamoru Fujitsuka, Tetsuro Majima, Toshio Kawato

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Abstract

2,6-Bis(porphyrin)-substituted 3,5-dimethylpyrazine and its zinc complex bound C70 to yield 1:1 inclusion complexes, which were characterised by ESI-MS, UV-vis, fluorescence and NMR spectroscopies. Association constants of the C70 complexes were determined by fluorescence and NMR spectral analyses. A decrease in absorbance of the Soret band of the pyrazine derivative by the effect of C70 was observed, suggesting the existence of a charge transfer interaction between C70 and porphyrin. Experimentally reliable values for the association constants were obtained by the NMR method and were about six times larger than those of the corresponding C60 complexes. Palladium complexation of the porphyrin-pyrazine ligand was found to enhance the association with fullerene. The association constant of 2,6-bis(porphyrin-Zn)- substituted 3,5-dimethylpyrazine-Pd(II) complex with C70 was determined to be 8400±900M-1. From the comparison of the association constants, it was found that inclusion room for C70 in the Pd(II) complex was maintained, juxtaposed between porphyrins attached to the opposite sides of the pyrazine ligands.

Original languageEnglish
Pages (from-to)517-523
Number of pages7
JournalSupramolecular Chemistry
Volume22
Issue number9
DOIs
Publication statusPublished - Sep 1 2010

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Pyrazines
Porphyrins
Ions
Derivatives
Association reactions
Nuclear magnetic resonance
Ligands
Fullerenes
Fluorescence spectroscopy
Palladium
Ultraviolet spectroscopy
Complexation
Nuclear magnetic resonance spectroscopy
Charge transfer
Zinc
Fluorescence
fullerene C70

All Science Journal Classification (ASJC) codes

  • Chemistry(all)

Cite this

Synthesis and properties of fullerene (C70) complexes of 2,6-bis(porphyrin)-substituted pyrazine derivatives bound to a Pd(II) ion. / Eda, Yusaku; Itoh, Kennosuke; Ito, Yoshio N.; Fujitsuka, Mamoru; Majima, Tetsuro; Kawato, Toshio.

In: Supramolecular Chemistry, Vol. 22, No. 9, 01.09.2010, p. 517-523.

Research output: Contribution to journalArticle

Eda, Yusaku ; Itoh, Kennosuke ; Ito, Yoshio N. ; Fujitsuka, Mamoru ; Majima, Tetsuro ; Kawato, Toshio. / Synthesis and properties of fullerene (C70) complexes of 2,6-bis(porphyrin)-substituted pyrazine derivatives bound to a Pd(II) ion. In: Supramolecular Chemistry. 2010 ; Vol. 22, No. 9. pp. 517-523.
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