کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
27149 | 44005 | 2010 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural and photochemical aspect of metal-ion-binding to a photochromic chromene annulated by crown-ether moiety
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
Complexation between a benzopyran entity annulated with a 15-crown-5 ether unit and three metal cations, Mg2+, Ba2+, and Pb2+ has been investigated by UV–vis and NMR spectroscopy. The complexes composition, the stability constants and the structural arrangements have been determined. The photochemical and thermal properties of the photochromic benzopyran derivative in absence and in the presence of metals have been studied. The metal-ion-binding ability of the fused macrocyclic entity drastically modifies photochromism by decreasing the thermal stability of photomerocyanines, whereas the metal cations are partially ejected from crown-ether cavity when benzopyran is in open configuration.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 209, Issues 2–3, 25 January 2010, Pages 111–120
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 209, Issues 2–3, 25 January 2010, Pages 111–120
نویسندگان
Sergey Paramonov, Stéphanie Delbaere, Olga Fedorova, Yuri Fedorov, Vladimir Lokshin, André Samat, Gaston Vermeersch,