کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9605476 | 44101 | 2005 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Photooxidation quantum yield efficiencies of naphthalene diimides under concentrated sun light in comparisons with perylene diimides
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thermal stabilities, solubilities redox potentials and photophysical parameters of 10 synthesized N-alkyl(aryl) derivatives of naphthalene diimides were studied for selecting the best derivatives at concentrated sun light experiments. N-aryl substitutions created better thermal stabilities than the N-alkyl substitution in naphthalene diimides. LUMO energy levels of NDIs, calculated from redox potentials, in the range of â3.55/â3.68 ev, proved that the naphthalene diimides can inject electrons efficiently in titania based organic dye sensitized solar cells. Fluorescence lifetimes of naphthalene diimides, Ïf = 11-34 ps, are faster than that of perylene diimides, Ïf = 4 ns. Calculated photooxidation quantum yields with a naphthalene diimide photosensitizer for the direct sun light oxidation reaction of anthracene is Ï = 0.014, and for the concentrated sun light of 10.2 sun is Ï = 0.044. In general photooxidation quantum yield efficiencies of naphthalene diimides under concentrated sun light irradiations are found to be higher with respect to the perylene dimide photosensitizers, due to production of both singlet oxygen and superoxide anion radical and enhancement of low wavelength solar radiation with aluminium surfaced mirror under concentrated sun light.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 175, Issues 2â3, 31 October 2005, Pages 214-220
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volume 175, Issues 2â3, 31 October 2005, Pages 214-220
نویسندگان
S. Erten, S. Alp, S. Icli,