کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
27723 | 44039 | 2008 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Quenching dynamics promoted by silver nanoparticles
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We have studied fluorescence quenching by electron transfer between tris(2,2′-bipyridyl)ruthenium(II) complex and methyl viologen in solutions containing silver nanoparticles. The Stern–Volmer plot and transient absorbance indicate that both dynamic and static mechanisms are involved in the quenching. In the presence of silver nanoparticles, reverse saturable absorption at silver surfaces has promoted the quenching process by populating the excited triplet state of the donor species. Furthermore, the negatively charged silver particles are effective catalysts in attracting the cationic donor–acceptor pairs into the “sphere-of-action”, which is the dominant mechanism for the static quenching.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 254–260
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 195, Issues 2–3, 15 April 2008, Pages 254–260
نویسندگان
I-Yin Sandy Lee, Honoh Suzuki,