Spectroscopic investigation of cyclodextrin monomers,derivatives, polymers and azo dyes (1) |
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Authors: | Miyoko Suzuki Éva Fenyvesi Mária Szilasi József Szejtli Márton Kajtár Béla Zsadon Yoshio Sasaki |
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Affiliation: | (1) Faculty of Pharmaceutical Sciences, Osaka University, 1-6, Yamadaoka, 565 Suita, Osaka, Japan;(2) Chinoin Pharmaceutical Chemical Works, Tó u. 1-5, H-1045 Budapest, Hungary;(3) Department of Chemical Technology, Eötvös Loránd University, Muzeum krt 6-8, H-1088 Budapest, Hungary;(4) Institute of Organic Chemistry, Eötvös Loránd University, Muzeum krt 4/b, H-1088 Budapest, Hungary |
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Abstract: | Circular dichroism (CD) and visible spectra of inclusion compounds between Methyl Orange (MO) analogues and -, -, -cyclodextrin (cdx), 2,6-dimethyl-and 2,3,6-trimethyl--cdx, water soluble -, -, -cdx polymer products were investigated. In the CD-spectroscopic investigation, the complex with -cdx epichlorohydrin condensate showed a large amplitude and splitting of the induced * band. Fractions of glyceryl ether of less than 2000 and polymer of more than 10000 dalton molecular mass were separated. Complexes of above two fractions and MO showed the same splitting spectral pattern. Job's plots from visible spectra showed the formation of the 11 complex and CD-data suggested the co-existence of the 21 MO-cdx complex. This splitting pattern showed the reversal of the signs when -cdx-ethyleneglycol-bis(epoxypropyl) ether was used and disappeared when larger host molecules and azo dyes were used. The splitting was explained by exciton interaction. |
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