کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6493059 | 44040 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Picosecond deactivation of azo dye excited states in solution and in cellulose
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
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چکیده انگلیسی
Ultrafast time-resolved UV-visible absorption spectroscopy has been used to study four model azo dyes and five commercial azo dyes. All of the dyes have been found to show strong bleaching of their ground-state absorption bands on photoexcitation, with recovery lifetimes of 1-5Â ps in aqueous solution that are attributed to rapid and efficient non-radiative decay; two commercial azo dyes deposited in cellophane have been found to show an additional longer-lived component with a lifetime of >50Â ps that is attributed to the effects of intermolecular interactions with the cellulosic environment.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 218, Issue 1, 5 February 2011, Pages 11-16
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 218, Issue 1, 5 February 2011, Pages 11-16
نویسندگان
Laurence C. Abbott, Stephen N. Batchelor, Lisinka Jansen, John Oakes, John R. Lindsay Smith, John N. Moore,