کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
26439 43952 2016 4 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Photolysis of crystalline alkali nitrates via excitation of NO3– to the state of symmetry 21E1|
ترجمه فارسی عنوان
فتولیز نیترات قلیایی بلورین از طریق تحریک NO3 به حالت تقارن 21E1 |
کلمات کلیدی
تحریک عکس؛ فتولیز ؛ نیترات؛ نیتریت؛ پروکسینیتریت؛ رادیکال ها
Photo excitation; Photolysis; Nitrate; Nitrite; Peroxynitrite; Radicals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
چکیده انگلیسی


• We studied photochemical transformations in alkali metal nitrates under the action of UV light with a wavelength of 172 nm.
• Photolysis at 77 K exhibits the formation of fragment NO2, O– and O3– radicals.
• The formation of radical products on the regular nitrate ion was not observed under photolysis both at 300 K and at 77 K.

Photolysis of crystalline alkali nitrates has been studied using optical, IR, and EPR spectroscopy and chemical analysis of the aqueous solutions of the exposed samples. Excitation of the nitrate ion to 21E1| (а1| ⟵ е|) state by exposure to light with wavelength of 172 nm at 300 K leads to formation of nitrite and peroxynitrite ions. The photolysis at 77 K results in formation of fragment NO2, O–, and O3– radicals. The quantum yields of the nitrite and peroxynitrite ions were calculated. The nitrite ions and peroxynitrite ions are formed in deep layers of the samples. The mechanism of radical formation is connected with photochemical transformations of the nitrate ion in the surface layer of the crystal.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 315, 15 January 2016, Pages 94–97
نویسندگان
, , , ,