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• W2029416058 endingPage "171" @default.
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• W2029416058 abstract "Ethidium bromide (EB), a known DNA intercalating agent and mutagen, binds in the interlayer regions of n-butyl ammonium salt of α-zirconium phosphate (BAZrP). The electronic absorption spectrum of EB changes drastically upon binding to BAZrP. For example, the 478 nm absorption band of the free chromophore is replaced by red shifted (600 nm) and blue shifted (450 nm) bands. The absorption spectrum of the bound chromophore was found to be independent of loading. Binding in the interlayer regions results in the strong quenching of the EB fluorescence accompanied by a large red shift of the spectral maximum. The results observed with acridinium hydrochloride (ACR) are in contrast to those of EB. At low concentrations of ACR, only a small amount of the ligand was bound and the binding is promoted at higher concentrations. The absorption spectra of ACR bound to BAZrP show a new band at 365 nm. The intensity of this band increases with loading and reaches a plateau at ca. 55 μM of ACR. The fluorescence spectra of ACR are blue shifted upon binding to BAZrP, with a strong quenching of the intensity. In both cases (EB and ACR) the average area occupied per molecule in the BAZrP galleries matched well with their footprints. Thus, they bind with their long axes parallel and π planes perpendicular to the ZrP planes. Binding of these cations to BAZrP results in aggregation of the chromophores with strong interchromophore interactions. Such spontaneous organized assembly of chromophores may be of interest in the design of supramolecular assemblies that are capable of promoting bimolecular photoreactions." @default.
• W2029416058 created "2016-06-24" @default.
• W2029416058 creator A5009529198 @default.
• W2029416058 creator A5014268540 @default.
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• W2029416058 date "1996-10-01" @default.
• W2029416058 modified "2023-09-27" @default.
• W2029416058 title "Supramolecular assemblies of ethidium and acridinium ions at the interlayer regions of α-zirconium phosphate" @default.
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• W2029416058 doi "https://doi.org/10.1016/0927-6513(95)00086-0" @default.
• W2029416058 hasPublicationYear "1996" @default.
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