کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5400393 1505920 2013 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A fluorescent chemosensor based on rhodamine for Cr3+ in red spectral region in aqueous solutions and living cells
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
A fluorescent chemosensor based on rhodamine for Cr3+ in red spectral region in aqueous solutions and living cells
چکیده انگلیسی
A new rhodamine-based derivative (1) is designed as a colorimetric and fluorescent “off-on” chemosensor for Cr3+ in aqueous solutions. Its sensing behaviors toward metal ions in neutral aqueous solutions were investigated by UV-vis absorption and fluorescence spectroscopies. Compound 1 is found to exhibit a significant increase in absorbance at 581 nm and an amplified fluorescence at 600 nm toward Cr3+ in a preferential, sensitive and rapid manner. Upon addition of Cr3+, the spirolactam ring (colorless and nonfluorescent) of 1 was opened to form a ring-opened amide (purple red color and fluorescent) and a 1:1 stoichiometry for the 1-Cr3+ complex was formed with an association constant of 5.75×104 M−1. The quantification of Cr3+ by 1 using a fluorescence spectroscopy method was satisfactory in the linear working range below 4 μM, with a detection limit of 3.75×10-9 M for Cr3+ and good tolerance of other metal ions. The chemosensor has been used for imaging of Cr3+ in living Hela cells with satisfying results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 140, August 2013, Pages 45-50
نویسندگان
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