کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5398658 | 1505889 | 2016 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Pyrenebutylamidopropylimidazole as a multi-analyte sensor for 3,5-dinitrosalicylic acid and Hg2+ ions
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
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چکیده انگلیسی
Pyrenebutylamidopropylimidazole 1 was synthesized as a sensor for 3,5-dinitrosalicylic acid (3,5-DNSA) and 5-nitrosalicylic acid (5-NSA), among other aromatic carboxylic acids, and Hg2+ among different metal ions in PBS-EtOH (5:95; pH=7.4) solutions. The sensing ability of probe 1 was examined using fluorescence and 1H NMR spectroscopy. The presence of 3,5-DNSA and 5-NSA resulted in 97% and 50% quenching, respectively, of the emission intensity at λmax=379 nm of probe 1, whereas the presence of Hg2+ resulted in the selective development of an excimer band at 476 nm with simultaneous quenching of the monomer emission. Probe 1 had good association constants with 3,5-DNSA (Ka=4.38Ã104 Mâ1) and 5-NSA (Ka=2.37Ã104 Mâ1) in a 1:1 stoichiometry in PBS-EtOH (5:95; pH=7.4) solution, whereas the presence of Hg2+ led to the formation of a 1:2 complex between Hg2+ and probe 1 with a high association constant (Ka=9.76Ã104 Mâ1). These results were further supported by energy-minimization density functional theory calculations.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 172, April 2016, Pages 309-316
Journal: Journal of Luminescence - Volume 172, April 2016, Pages 309-316
نویسندگان
Ashwani Kumar, Anup Pandith, Hong-Seok Kim,