کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6317976 | 1619176 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quantifying the dynamic fluorescence quenching of phenanthrene and ofloxacin by dissolved humic acids
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم محیط زیست
شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Quantifying the dynamic fluorescence quenching of phenanthrene and ofloxacin by dissolved humic acids Quantifying the dynamic fluorescence quenching of phenanthrene and ofloxacin by dissolved humic acids](/preview/png/6317976.png)
چکیده انگلیسی
Fluorescence quenching includes dynamic and static quenching, and both processes can alter the behavior and reactivity of the fluorescer. However, dynamic quenching is seldom quantified. This study combined dialysis equilibrium and fluorescence quenching methods to compare the contribution of dynamic and static quenching. The results indicate that phenanthrene (PHE)-DHA binding increased with DHA hydrophobicity, while ofloxacin (OFL)-DHA interaction showed the opposite effect. For PHE, the contribution of dynamic quenching to the overall fluorescence quenching was in the range of 50%â¼82% and decreased to 11%â¼58% with increased DHA hydrophobicity. However, OFL dynamic quenching increased from 2%â¼27% to 31%â¼61% with DHA hydrophobicity. Combining the results using model chemicals, we concluded that the carboxyl groups in DHA might be the primary components for PHE dynamic quenching and might be responsible for both dynamic and static quenching of OFL. Extensive study is needed to explore the quantitative relationship of dynamic quenching and chemical/DHA properties.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Pollution - Volume 196, January 2015, Pages 379-385
Journal: Environmental Pollution - Volume 196, January 2015, Pages 379-385
نویسندگان
Lin Wang, Ni Liang, Hao Li, Yu Yang, Di Zhang, Shaohua Liao, Bo Pan,