Subpicosecond dynamic Stokes shift in β-carotene solution probed by excitation energy dependence of fluorescence spectrum

1993 ◽  
Vol 213 (3-4) ◽  
pp. 351-355 ◽  
Author(s):  
Junji Watanabe ◽  
Hirokazu Takahashi ◽  
Juníchiro Nakahara ◽  
Takashi Kushida
Keyword(s):  
Excitation Energy ◽  
Fluorescence Spectrum ◽  
Energy Dependence ◽  
Stokes Shift ◽  
Β Carotene

Resonant Secondary Emission and Its Excitation Energy Dependence in Monoclinic Zinc Diphosphide

1994 ◽  
Vol 63 (11) ◽  
pp. 4249-4255 ◽  
Author(s):  
Osamu Arimoto ◽  
Mitsuru Sugisaki ◽  
Kaizo Nakamura ◽  
Koichiro Tanaka ◽  
Tohru Suemoto
Keyword(s):  
Excitation Energy ◽  
Energy Dependence ◽  
Secondary Emission ◽  
Zinc Diphosphide

Intravalley Scattering Probed by Excitation Energy Dependence of Valley Polarization in Monolayer MoS2

2021 ◽  
Author(s):  
Eito Asakura ◽  
Takeshi Odagawa ◽  
Masaki Suzuki ◽  
Shutaro Karube ◽  
Junsaku Nitta ◽  
...  
Keyword(s):  
Excitation Energy ◽  
Energy Dependence ◽  
Monolayer Mos2 ◽  
Valley Polarization

The Position of Carotene in the D-1/D-2 Sub-Core Complex of Photosystem II

1988 ◽  
Vol 43 (3-4) ◽  
pp. 226-230 ◽  
Author(s):  
S. S. Brody
Keyword(s):  
Low Temperature ◽  
Photosystem Ii ◽  
Fluorescence Spectrum ◽  
Fluorescence Excitation Spectrum ◽  
Core Complex ◽  
Excitation Spectra ◽  
Fluorescence Excitation ◽  
Pheophytin A ◽  
Long Wavelength ◽  
Β Carotene

When the sub-core complex of photosystem II, D1/D2, is irradiated at 436 or 415 nm (absorption by chlorophyll and pheophytin and β-carotene) or 540 nm (absorption primarily by pheophytin), the low temperature fluorescence spectrum has two maxima, at 685 and 674 nm. This shows the existence of at least two different fluorescent forms of chlorophyll (chlorophyll a and perhaps pheophytin a). When carotene is irradiated at 485 nm (absorption primarily by β-carotene), only fluorescence at 685 nm is observed: this indicates that carotene is transferring energy to only the long-wavelength form of chlorophyll in the D1/D2 sub-core complex. The band of carotene (at 485 nm) does not appear in the fluorescence excitation spectrum, measured at 674 nm. The position of the carotene molecule relative to each of the fluorescent forms of chlorophyll was determined from the excitation spectra of each of the fluorescence bands.

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