Energies and Excited-State Dynamics of 1Bu+, 1Bu- and 3Ag- States of Carotenoids Bound to LH2 Antenna Complexes from Purple Photosynthetic Bacteria

Christiana, Rebecca and Miki, Takeshi and Kakitani, Yoshinori and Aoyagi, Shiho and Koyama, Yasushi and Limantara, Leenawaty (2009) Energies and Excited-State Dynamics of 1Bu+, 1Bu- and 3Ag- States of Carotenoids Bound to LH2 Antenna Complexes from Purple Photosynthetic Bacteria. Chemical Physics Letters, 480. pp. 298-295.

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Abstract

Time-resolved pump–probe stimulated-emission and transient-absorption spectra were recorded after excitation with ∼30 fs pulses to the 1Bu+(0) and optically-forbidden diabatic levels of carotenoids, neurosporene, spheroidene and lycopene having n = 9–11 double bonds, bound to LH2 antenna complexes from Rhodobacter sphaeroides G1C, 2.4.1 and Rhodospirillum molischianum. The low-energy shift of stimulated emission from the covalent 1Bu-(0) and 3Ag-(0) levels slightly larger than that from the ionic 1Bu+(0) state suggests the polarization, whereas more efficient triplet generation suggests the twisting of the conjugated chain in Cars bound to the LH2 complexes, when compared to Cars free in solution

Item Type: Artikel Jurnal/Prosiding
Subjects: Q Science > QD Chemistry
Divisions: Fakultas Teknologi dan Desain > Teknik Sipil
Depositing User: Admin Repository
Date Deposited: 15 Apr 2020 10:47
Last Modified: 03 Jun 2022 01:40
URI: http://eprints.upj.ac.id/id/eprint/91

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