کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1926544 1536460 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Multidimensional spectroscopy of β-carotene: Vibrational cooling in the excited state
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Multidimensional spectroscopy of β-carotene: Vibrational cooling in the excited state
چکیده انگلیسی

Pump-degenerate four wave mixing (Pump-DFWM) is used for investigating the vibrational dynamics in the excited state of β-carotene in solution. In this 2D technique, an initial pump pulse promotes the system to the excited state, which is then probed by the succeeding DFWM sequence. We focus particularly on the internal conversion between the S2 and S1 state with high temporal and spectral resolution. The frequency shift of the excited state vibrations is measured and is explained as mode-specific vibrational cooling. Our results suggest an internal conversion in a time range between 260 and 500 fs without any intermediate states.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 483, Issue 2, 15 March 2009, Pages 219–223
نویسندگان
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