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• W1978807824 abstract "A water soluble β-cyclodextrin (CD-NA) bearing seven naphthoyl chromophores forms very stable 1:1 complexes with a merocyanine laser dye DCM-OH (4-(dicyanomethylene)-2-methyl-6-(p-(bis(hydroxyethyl)amino)styryl)-4H-pyran). The antenna effect, i.e. energy transfer from the naphthoyl antenna chromomophores to the encased dye, is shown to occur with 100% efficiency. The stability of the complexes is very high (Ks ≈ 105) owing to the contribution of the naphthoate residues. The structural features of the complexes have been examined in detail: circular dichroism experiments confirm the expected axial orientation of DCM-OH in the cavity of CD-NA, and fluorescence anisotropy measurements together with 13C-NMR longitudinal relaxation time measurements show that the complex formed between CD-NA and DCM-OH is tight. The mechanisms of homotransfer (i.e., between naphthoate chromophores) and heterotransfer (i.e., from naphthoate chromophores to DCM-OH included in the cavity) are discussed in light of existing theories. In both cases, the major contribution arises more likely from Coulombic interaction than from short-range interactions. Such multichromophoric cyclodextrins are good models for mimicry of the antenna function in photosynthesis and show great promise as photochemical microreactors." @default.
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• W1978807824 date "1996-01-01" @default.
• W1978807824 modified "2023-10-18" @default.
• W1978807824 title "Multichromophoric Cyclodextrins. 4. Light Conversion by Antenna Effect" @default.
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• W1978807824 doi "https://doi.org/10.1021/ja954332t" @default.
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