کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1322447 977208 2011 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced absorption and fluorescence efficiency of silylethynyl-functionalized oligothiophenes and thieno[3,2–b]thiopahene
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی معدنی
پیش نمایش صفحه اول مقاله
Enhanced absorption and fluorescence efficiency of silylethynyl-functionalized oligothiophenes and thieno[3,2–b]thiopahene
چکیده انگلیسی

Silylethynyl-substituted oligothiophenes and thieno[3,2-b]thiophene were synthesized by the Sonogashira coupling reaction. The absorption and fluorescence maxima of these compounds shifted to longer wavelength, and they exhibited higher absorption coefficients and quantum yields than the corresponding unsubstituted molecules and tert-butylethynyl derivatives. From the DFT calculation, the energy band gap between HOMO and LUMO decreases by the introduction of a silicon atom. Thus, silyl groups can play important role in enhancing the quantum efficiency and decreasing the band-gap of chromophores. Hence, Silylethynyl group can serve as a highly efficient auxiliary for use in optical devices.

Silylethynyl-substituted oligothiophenes and thieno[3,2-b]thiophene were synthesized by the Sonogashira coupling reaction. They exhibited longer absorption and fluorescence peak wavelengths as well as higher absorption coefficients and quantum yields than the corresponding unsubstituted molecules and tert-butylethynyl derivatives.Figure optionsDownload as PowerPoint slideResearch highlights
► Silylethynyl-substituted oligothiophenes and thieno[3,2-b]thiophene were synthesized by the Sonogashira coupling reaction.
► They exhibited longer absorption and fluorescence peak wavelengths as well as higher absorption coefficients and quantum yields than the corresponding tert-butylethynyl derivatives.
► Silicon can play important role in enhancing the quantum efficiency and decreasing the band-gap of chromophores.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Organometallic Chemistry - Volume 696, Issue 6, 15 March 2011, Pages 1266–1271
نویسندگان
, , , , , ,