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- W2090935653 abstract "The syntheses of 1,10-phenanthroline fluorophore-based chemosensor 7 and its truncated analog 9 are reported. Interactions of these compounds with urea, thiourea, 1,3-dimethylurea, tetrahydropyrimidin-2(1H)-one, imidazolidin-2-one, and selected uronium salts were assessed by three-dimensional excitation−emission spectroscopy, UV−vis absorbance, and fluorescence titrations. Chemosensor 7 was found to be capable of distinguishing between neutral ureas and their salts, by producing a different optical response for each type of compounds. The complexation of urea by 7 was also studied by selective-NOE 1H NMR, 13C NMR (using 13C-labeled guest), and MALDI-TOF mass spectrometry. In addition, we performed DFT calculations (B3LYP 3-21g** level) for structures of complexes of 7 with urea, imidazolidin-2-one, and tetrahydropyrimidin-2(1H)-one. Development of chemosensor 7-type compounds in conjunction with differential excitation−emission spectroscopy represents an important step toward the development of novel tools for ureas and their salts analysis." @default.
- W2090935653 created "2016-06-24" @default.
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- W2090935653 date "2007-03-01" @default.
- W2090935653 modified "2023-10-16" @default.
- W2090935653 title "Phenanthroline-Derived Ratiometric Chemosensor for Ureas" @default.
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- W2090935653 doi "https://doi.org/10.1021/jo062130h" @default.
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