کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10412760 | 895152 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fluorescent, stimuli-responsive, crosslinked PNIPAM-based microgel
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Fluorescent, stimuli-responsive, crosslinked PNIPAM-based microgel Fluorescent, stimuli-responsive, crosslinked PNIPAM-based microgel](/preview/png/10412760.png)
چکیده انگلیسی
We have synthesized a highly pH and temperature-sensitive, fluorescent, crosslinked poly(N-isopropylacrylamide) (PNIPAM)-based probe via simple free radical emulsion copolymerization, which formed a reversible microgel containing both fluorophores of fluorescein and rhodamine derivatives. We confirmed that the opening of the lactone ring of fluorescein and the lactam ring of rhodamine in the polymer was responsible for the fluorescence changes in basic and acidic conditions, which showed fluorescence emissions at 514Â nm (green) and 586Â nm (red), respectively. The polymeric microgel exhibited a linear relationship between the ratio of emission intensity and pH windows of pH 2-6 and 7-12. Moreover, the microgel exhibited changes in fluorescence intensity with an alteration of turbidity of the microgel induced by temperature. Moreover, these fluorescence changes could be easily observed by the naked eye, serving as a potential probe for ratiometric microgel detection of pH or temperature.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Sensors and Actuators B: Chemical - Volume 207, Part A, February 2015, Pages 623-630
Journal: Sensors and Actuators B: Chemical - Volume 207, Part A, February 2015, Pages 623-630
نویسندگان
Yongkyun Kim, Daigeun Kim, Geunseok Jang, Jongho Kim, Taek Seung Lee,