کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5278963 | 1385615 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Selective fluorescent PET sensing of fluoride (Fâ) using naphthalimide-thiourea and -urea conjugates
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
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چکیده انگلیسی
The thiourea and urea functionalised 4-amino-1,8-naphthalimide sensors 1-3, based on the fluorophore-spacer-receptor principle, were synthesised in high yield in three steps. The sensors were shown to signal selectively the detection of fluoride in the fluorescence emission spectrum in DMSO. On all occasions the emission was quenched due to enhanced photoinduced electron transfer quenching (PET) from the receptor to the excited state of the fluorophore upon recognition of Fâ, particularly for the thiourea sensors 1 and 2. In comparison, the changes in the absorption spectra were minor for all three, even after the addition of 80-100Â equiv of Fâ. The sensing of acetate or dihydrogenphosphate gave rise to only â¼5-20% quenching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron Letters - Volume 48, Issue 45, 5 November 2007, Pages 8043-8047
Journal: Tetrahedron Letters - Volume 48, Issue 45, 5 November 2007, Pages 8043-8047
نویسندگان
Rebecca M. Duke, Thorfinnur Gunnlaugsson,