کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8288546 | 1536256 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Excited-state properties of the central-cis isomer of the carotenoid peridinin
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
بیوشیمی، ژنتیک و زیست شناسی مولکولی
زیست شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Excited-state properties of the central-cis isomer of the carotenoid peridinin Excited-state properties of the central-cis isomer of the carotenoid peridinin](/preview/png/8288546.png)
چکیده انگلیسی
The central-cis isomer of the carotenoid peridinin, presumably 13-cis, was separated and studied with spectroscopic methods including static absorption, fluorescence and femtosecond time-resolved absorption. The investigations exposed differences in the photophysical properties of this isomer in respect to all-trans peridinin. Steady-state absorption spectroscopy revealed the presence of an additional weak absorption band at the long wavelength tail of the main S0 â S2 transition. Modelling of the hypothetical vibronic progression of the S0 â S1 electronic transition demonstrated that this weak band can be associated with a higher (0-2) vibronic band of the transition and that lower vibronic bands have negligible intensities due to a large displacement between the S0 and S1 states energy curves as also suggested by the spectral shape of steady-state fluorescence emission. Transient absorption studies demonstrated that the lifetime of the S1 state of the central-cis isomer is shorter compared to the all-trans counterpart by 6-16%, depending on the polarity of the solvent. On the other hand, molecular isomerization negligibly affects the lifetime of intramolecular charge transfer (ICT), which for both isomers is â¼10 ps in the polar solvent methanol.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Archives of Biochemistry and Biophysics - Volume 649, 1 July 2018, Pages 29-36
Journal: Archives of Biochemistry and Biophysics - Volume 649, 1 July 2018, Pages 29-36
نویسندگان
Dariusz M. Niedzwiedzki, Robert E. Blankenship,