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• W2076283624 abstract "A UV–vis, steady-state, and time-resolved fluorescence 2D 1H NOESY NMR spectroscopic and rheological study of new poly(acrylate)s 3% randomly substituted with either N-(2-aminoethyl)-, N-(6-aminohexyl)-, or N-(12-aminododecyl)-5-dansyl-sulfonamide to give the substituted polymers PAADSen, PAADShn, and PAADSddn, respectively, is reported. Their dansyl substituent aggregation and complexation by β-cyclodextrin, βCD, and its covalently linked dimer N,N′-bis(6A-deoxy-6A-β-cyclodextrin)urea, 66βCD2ur, is also reported. The βCD complexation of the dansyl substituents is characterized by apparent complexation constants, K = 89, 105, and 55 dm3 mol–1 for PAADSen, PAADShn, and PAADSddn, respectively, and the analogous complexations by 66βCD2ur are characterized by K = 3.04 × 103, 3.42 × 104, and 2.42 × 105 dm3 mol–1 at pH 7.0 in aqueous 0.10 mol dm–3 NaCl at 298.2 K. Under the same conditions the dansyl substituent shows three fluorescence decay constants assigned to the aggregated (τ1 = 2.2, 2.5, and 3.2 ns), single (τ2 = 5.0, 5.3, and 9.5 ns), βCD (τ3 = 13.2, 11.7 ns, and undetected), and 66βCD2ur complexed dansyl substituent states (τ3 = 13.9, 20.8, and 19.3 ns) where the values in each data set correspond to PAADSen, PAADShn, and PAAddn solutions, respectively. 2D 1H NOESY NMR spectroscopy provides additional insight into dansyl substituent complexation by βCD and 66βCD2ur, as do rheological studies. These data are interpreted in terms of the factors affecting dansyl substituent fluorescence quenching and the impact of tether length on dansyl substituent aggregation, complexation, and network formation." @default.
• W2076283624 created "2016-06-24" @default.
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• W2076283624 date "2011-11-22" @default.
• W2076283624 modified "2023-09-26" @default.
• W2076283624 title "Aggregation and Host–Guest Interactions in Dansyl-Substituted Poly(acrylate)s in the Presence of β-Cyclodextrin and a β-Cyclodextrin Dimer in Aqueous Solution: A UV–Vis, Fluorescence, ¹H NMR, and Rheological Study" @default.
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• W2076283624 doi "https://doi.org/10.1021/ma202055a" @default.
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