کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5397694 1505878 2017 27 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Linear photophysics, two-photon absorption and femtosecond transient absorption spectroscopy of styryl dye bases
ترجمه فارسی عنوان
فوتوفیزیک خطی، جذب دو فوتون و طیف سنجی جذب گذرا فمتوثانوی پایه های استریلی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
چکیده انگلیسی
The steady-state and time-resolved linear spectral properties, two-photon absorption spectra and fast relaxation processes in the excited states of styryl base-type derivatives were investigated. The nature of linear absorption, fluorescence and excitation anisotropy spectra were analyzed in solvents of different polarity at room temperature and specific dependence of the solvatochromic behavior on the donor-acceptor strength of the terminal substituents was shown. Two-photon absorption (2PA) efficiency of styryl dye bases was determined in a broad spectral range using two-photon induced fluorescence technique, and cross-sections maxima of ~ 100 GM were found. The excited state absorption (ESA) and fast relaxation processes in the molecular structures were investigated by transient absorption femtosecond pump-probe methodology. The role of twisted intramolecular charge transfer (TICT) effect in the excited state of styryl dye base with dimethylamino substituent was shown. The experimental spectroscopic data were also verified by quantum chemical calculations at the Time Dependent Density Functional Theory level, combined with a polarizable continuum model.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Luminescence - Volume 183, March 2017, Pages 360-367
نویسندگان
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