کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
28531 44080 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Photochromism of 8-thienyl-naphthopyrans investigated by NMR spectroscopy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
Photochromism of 8-thienyl-naphthopyrans investigated by NMR spectroscopy
چکیده انگلیسی

The photochromism of four 8-thienyl-naphthopyrans substituted either directly or via an acetylenic bridge to one or two thienyl groups, has been investigated by NMR spectroscopy. The two expected transoid photomerocyanines TC (transoid-cis) and TT (transoid-trans) have been characterised. From the numerical analysis of the kinetics recorded during photocolouration under UV irradiation and during thermal relaxation in the dark, several kinetic parameters related to the photochemical and thermal isomerization processes were determined. Their relative values are discussed and compared to two H-substituted parent compounds.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 181, Issues 2–3, 31 July 2006, Pages 174–179
نویسندگان
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