کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
177725 458997 2008 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The synthesis, characterization and properties of coumarin-based chromophores containing a chalcone moiety
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
The synthesis, characterization and properties of coumarin-based chromophores containing a chalcone moiety
چکیده انگلیسی

A series of coumarin-based derivatives containing a chalcone moiety were synthesized by condensation of 3-acetyl coumarins with aryl or heteroaryl aldehydes in the presence of piperidine in ethanol under microwave irradiation. Structures were established on the basis of 1H NMR, IR, MS and elemental analyses while crystal structure was determined using X-ray diffraction. Absorption and emission spectra showed red-shifts according to the strength of the electron-donating moieties and conjugation length. Replacement of a carbazolyl donor with a triphenylamine group in the coumarinyl-based chromophores resulted in a strong bathochromic shift (1700–1900 cm−1), while the benzocoumarin system caused a bathochromic effect of ∼100–500 cm−1 relative to the coumarin system.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Dyes and Pigments - Volume 78, Issue 1, 2008, Pages 65–76
نویسندگان
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