کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9605545 | 44166 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Highly selective sensing of lead ion based on α-, β-, γ-, and δ-tetrakis(3,5-dibromo-2-hydroxylphenyl)porphyrin/β-CD inclusion complex
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
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چکیده انگلیسی
α, β, γ, δ-Tetrakis(3,5-dibromo-2-hydroxylphenyl)porphyrin (TDBHPP) was synthesized and used for the fluorimetric determination of trace amount of lead ion in aqueous solution based on the inclusion interaction of the porphyrin with β-cyclodextrin (β-CD). In aqueous solution, the interaction of β-CD with TDBHPP caused a large enhancement of the porphyrin fluorescence intensity. In addition, the increased fluorescence of TDBHPP by β-CD was sensitive to metal ion following the fluorescence quenching of TDBHPP at its maximum emission wavelength. The quenching of TDBHPP fluorescence at room temperature was fast and nearly complete upon lead ion interaction. The organizing ability of the β-CD medium and the protection of the ligand from the micro-environment conferred in increased sensitivity, selectivity and detection limit, and allowed the determination of 2.8 Ã 10â7 to 7.4 Ã 10â5 mol/L lead compared with those obtained in the absence of β-CD. The method was applied in the analysis of synthetically biological samples with satisfactory results.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 173, Issue 3, 15 July 2005, Pages 264-270
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 173, Issue 3, 15 July 2005, Pages 264-270
نویسندگان
Ying Zhang, WangChu Xiang, RongHua Yang, Feng Liu, KeAn Li,