دورية أكاديمية
Ultrafast energy transfer within the photosystem II core complex
| العنوان: | Ultrafast energy transfer within the photosystem II core complex |
|---|---|
| المؤلفون: | Pan, Jie, Gelžinis, Andrius, Chorošajev, Vladimir, Vengris, Mikas, Senlik, Seckin S., Shen, Jian-Ren, Valkūnas, Leonas, Abramavičius, Darius, Ogilvie, Jennifer P. |
| المصدر: | Physical chemistry chemical physics, Cambridge : Royal Society of Chemistry, 2017, Vol. 19, iss.23, p. 15356-15367 ; ISSN 1463-9076 |
| سنة النشر: | 2017 |
| المجموعة: | LSRC VL (Lithuanian Social Research Centre Virtual Library) / LSTC VB (Lietuvos socialinių tyrimų centras virtualią biblioteką) |
| مصطلحات موضوعية: | 2-dimensional electronic spectroscopy, Charge recombination reactions, Antenna protein complex, Optical-spectra, Thermosynechococcus-elongatus, Transient absorption, Picosecond kinetics, Crystal-structure, Cp43 antenna, Pump-probe |
| الوصف: | We report 2D electronic spectroscopy on the photosystem II core complex (PSII CC) at 77 K under different polarization conditions. A global analysis of the high time-resolution 2D data shows rapid, sub-100 fs energy transfer within the PSII CC. It also reveals the 2D spectral signatures of slower energy equilibration processes occurring on several to hundreds of picosecond time scales that are consistent with previous work. Using a recent structure-based model of the PSII CC [Y. Shibata, S. Nishi, K. Kawakami, J. R. Shen and T. Renger, J. Am. Chem. Soc., 2013, 135, 6903], we simulate the energy transfer in the PSII CC by calculating auxiliary time-resolved fluorescence spectra. We obtain the observed sub-100 fs evolution, even though the calculated electronic energy shows almost no dynamics at early times. On the other hand, the electronic–vibrational interaction energy increases considerably over the same time period. We conclude that interactions with vibrational degrees of freedom not only induce population transfer between the excitonic states in the PSII CC, but also reshape the energy landscape of the system. We suggest that the experimentally observed ultrafast energy transfer is a signature of excitonic-polaron formation. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | http://ftmc.lvb.lt/FTMC:ELABAPDB23344811&prefLang=en_USTest |
| الإتاحة: | https://doi.org/10.1039/C7CP01673ETest http://ftmc.lvb.lt/FTMC:ELABAPDB23344811&prefLang=en_USTest |
| رقم الانضمام: | edsbas.95BD7414 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |