Photochemical and Anion Binding Properties of Ruthenium Tris(bipyridyl) Complexes with Amide Groups: Toward an Artificial and Photo-functional Protein.
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Accession number;04A0258620
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| Title;Photochemical and Anion Binding Properties of Ruthenium Tris(bipyridyl) Complexes with Amide Groups: Toward an Artificial and Photo-functional Protein. |
| Author;
ISHIDA HITOSHI
(Kitasato Univ., Sch. of Sci.)
KYAKUNO MASATO
(Kitasato Univ., Sch. of Sci.)
FUJII MINA
(Kitasato Univ., Sch. of Sci.)
INADA HIROSHI
(Kitasato Univ., Sch. of Sci.)
OISHI SHIGERO
(Kitasato Univ., Sch. of Sci.)
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Journal Title;Abstracts. Symposium on Biofunctional Chemistry
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Journal Code:L0836A
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ISSN:
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VOL.18th;NO.;PAGE.76-77(2003)
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| Figure&Table&Reference;FIG.2 |
| Pub. Country;Japan |
| Language;Japanese |
| Abstract;Unnatural amino acids have received increasing attraction for designing functional peptides. We propose herein one strategy for designing functional peptides by utilizing 5'-amino-2,2'-bipyridyl-5-carboxylic acid as an unnatural amino acid (Fig. 1A). The peptide including this is expected to fold up to give a definite conformation through coordination with metal ions. Furthermore, if ruthenium is used as the metal, the core metal complex becomes a ruthenium tris(bipyridine) derivative, which promises to exhibit photochemical functions. In order to predict the photochemical properties and photo-functions, we synthesized ruthenium tris(2,2'-bipyridine) complexes bearing amide groups at 5,5'-positions (Fig. 1B). These model complexes were investigated for crystal structures, photophysical properties, and functional aspects. As results, we found that the direction of amide groups (RNHCO- or RCONH-) significantly affected the photophysical properties of the ruthenium complexes: [Ru(5RCONHbpy)3]2+ showed the emission at shorter wavelength with the longer life time and the larger quantum yield than [Ru(RNHCObpy)3]2+. We further found that these ruthenium complexes could strongly bind with some anions such as chloride or acetate with he ratio (Ru:X-) of 1:2. (author abst.) |
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