کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5400906 | 1392703 | 2012 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Spectral characteristics and fluorescence quenching of N,Nâ²-bis(4-pyridyl)-3,4:9,10-perylenebis(dicarboximide) (BPPD)
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The photophysical properties such as electronic absorption, molar absorptivity, emission spectra, fluorescence quantum yield and fluorescence lifetime of N,Nâ²-bis(4-pyridyl)-3,4:9,10-perylene bis(dicarboximide) (BPPD) have been measured in different solvents. Both electronic absorption and fluorescence spectra are not sensitive to medium polarity, while the fluorescence quantum yield (Ïf) is solvent dependent. The ground state geometry has been computed by using density functional theory (DFT), the transition from HOMO to LUMO from perylene core with maximum absorption at 512Â nm and HOMO-LUMO energy difference equal 2.53Â eV. BPPD dye undergoes molecular aggregation to dimmer or higher aggregates in dimethyl sulfoxide (DMSO). Crystalline solids of BPPD gives excimer-like emission at 676Â nm. The fluorescence quenching of BPPD is also studied using hydrated ferric oxide nanoparticle (FeOOH), and the Stern-Volmer rate constants (Ksv) were calculated as 8Ã106 and 9.2Ã106Â Mâ1 in ethanol and ethylene glycol, respectively.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 132, Issue 10, October 2012, Pages 2747-2752
Journal: Journal of Luminescence - Volume 132, Issue 10, October 2012, Pages 2747-2752
نویسندگان
Samy A. El-Daly, Khalid A. Alamry, Abdullah M. Asiri, Mahmoud A. Hussein,