Excitation Energy Transfer Dynamics Of Chlorophyll-d (Chl-d) Based On The Acaryochloris Marina Photosystem Ii (Ampsii) In Far-Red Light

Mardianto, Frecia Elrivia (2024) Excitation Energy Transfer Dynamics Of Chlorophyll-d (Chl-d) Based On The Acaryochloris Marina Photosystem Ii (Ampsii) In Far-Red Light. Project Report. [s.n.], [s.l.]. (Unpublished)

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Abstract

Basically, chlorophyll a (Chl-a) is the most essential component as the major donor in reaction photosystem II (PSII) to provide sufficient electrons for the high redox potential of the water splitting reaction. However, Chl-d in Acaryochloris marina appears to play a key role in the photosynthetic reaction. In order to gain a better understanding of how these reactions occur in this particular photosystem, this study clarified the Chl-d→Chl-d energy transfer dynamics on Acaryochloris marina photosystem II (AmPSII) — cholorophyll binding protein (CBP) supercomplexes utilizing femtosecond (fs) pump-probe spectroscopy. The characterization utilizing a UV-VIS spectrophotometer indicates that Chl-d in A. marina absorbs light in red regions effectively around 710 nm. Therefore, the sample excited using light at wavelengths of 700 nm and 720 nm. After excitation by the light, chl-d bleaching occurs at specific wavelengths in the fsTA spectra. It is potentially caused by the transfer of excitation energy between the molecules in the system during photosynthesis. Moreover, the energy transfer process of A. marina has reached equilibrium at a delay time of 10 ps. It is also known that the energy absorbed at 720 nm excitation leads to a faster and more stable dynamic response overall compared to excitation at 700 nm.

Item Type:	Monograph (Project Report)
Uncontrolled Keywords:	Acaryochloris marina, Chl-d, Excitation, Spectroscopy, Photosystem II
Subjects:	Q Science > QC Physics > QC162 Adsorption and absorption Q Science > QC Physics > QC451 Spectroscopy Q Science > QK Botany > QK568 Microalgae
Divisions:	Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Frecia Elrivia Mardianto
Date Deposited:	24 Jan 2025 07:27
Last Modified:	24 Jan 2025 07:27
URI:	http://repository.its.ac.id/id/eprint/116896

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