کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1496950 | 992980 | 2007 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Two-photon absorption properties of malononitrile derivatives
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Two malononitrile derivatives, 2-[2,5-bis-(4-dimethylamino-benzylidene)-cyclopentylidene]-malononitrile (1) and 2-{2,6-bis-[2-(4-dimethylamino-phenyl)-vinyl]-pyran-4-ylidene}-malononitrile (2), were synthesized and their photophysical characteristics were investigated using UV-vis spectra, fluorescence spectra, nonlinear transmission and two-photon excited spectra. The results showed that both compounds exhibited strong intramolecular charge transfer absorption bands within 400-600Â nm, but only compound 2 presented a strong fluorescence emission. By nonlinear transmission method, the two-photon absorption cross-section (Ï) values of two compounds were determined as 250Â GM and 283Â GM, respectively, with 800Â nm femtosecond laser pulses. By two-photon excited fluorescence method, the two-photon excited spectra of compound 2 within 720-880Â nm was measured and its Ïmax was obtained as 773Â GM at 770Â nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Optical Materials - Volume 29, Issue 9, May 2007, Pages 1206-1210
Journal: Optical Materials - Volume 29, Issue 9, May 2007, Pages 1206-1210
نویسندگان
Yuxia Zhao, Li Xiao, Feipeng Wu, Xiangyun Fang,