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Volumn 106, Issue 36, 2002, Pages 9424-9433

Ultrafast energy transfer from a carotenoid to a chlorin in a simple artificial photosynthetic antenna

Author keywords

[No Author keywords available]

Indexed keywords

ANISOTROPY; COMPLEXATION; ENERGY TRANSFER; FLUORESCENCE; PROTEINS; REACTION KINETICS; ULTRAFAST PHENOMENA;

EID: 0037068887     PISSN: 10895647     EISSN: None     Source Type: Journal    
DOI: 10.1021/jp0212343     Document Type: Article
Times cited : (47)

References (52)
  • 20
    • 0011744239 scopus 로고    scopus 로고
    • note
    • x region, which is much weaker for purpurin 2 compared to dyad 1.
  • 21
    • 0011770923 scopus 로고    scopus 로고
    • note
    • 2 = 1.08).
  • 22
    • 0011746455 scopus 로고    scopus 로고
    • note
    • The wavelength-dependent behavior of the ∼1.4 ps component has only a small effect on the shape of the time-dependent fluorescence spectra, reconstructed after normalization of the isotropic kinetics to the steady-state fluorescence spectrum (Figure 3). There is no shift in the emission maximum between 0.3 and 4.3 ps and only a small (∼1 nm) decrease in the bandwidth. We assign the 1.4 ps time constant to cooling of the vibrationally hot purpurin molecules, which are produced following ultrafast (< 100 fs) relaxation from higher vibronic or electronic levels.
  • 25
    • 0011749546 scopus 로고    scopus 로고
    • note
    • Similar results were obtained at other wavelengths, with the anisotropy decaying from 0.40 to 0.012 with a lifetime of 61 fs at 688 nm and from 0.40 to 0.033 in 49 fs at 712 nm.
  • 26
    • 0011716850 scopus 로고    scopus 로고
    • note
    • 1 excited-state absorption, which has a tail extending at least as far as 730 nm (see Figure 7). The kinetics of dyad 1 display no slow rise component after subtraction of the decay kinetics of carotenoid 3 at 701 nm scaled by 26%. Instead, a recovery component of ∼1.2 ps is revealed.
  • 29
    • 0011746313 scopus 로고    scopus 로고
    • note
    • 2 states. However, under the conditions of our experiments (temporal resolution, wavelength range, etc.), there is no evidence for the involvement of such a state in the singlet energy transfer process in 1.
  • 33
    • 0011750536 scopus 로고    scopus 로고
    • note
    • 1 energy pathway (Figure 1) to the overall efficiency is negligible (∼0.3%).
  • 50
    • 0011772777 scopus 로고    scopus 로고
    • note
    • -1 for a lateral displacement of 10 Å.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.