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Journal of the American Chemical Society
Volumn 130, Issue 21, 2008, Pages 6708-6709
Direct observation of the primary bond-twisting dynamics of stilbene anion radical
Author keywords

[No Author keywords available]
Indexed keywords

STILBENE;
EID: 44349147208     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja801926m     Document Type: Article
Times cited : (8)
References (19)
  • 1
    • 0002213539 scopus 로고
    • Dürr, H, Bouas-Laurent, H, Eds, Elsevier: Amsterdam, and references therein
    • Saltiel, J.; Sun, Y.-P. In Photochroism-Molecules and Systems; Dürr, H., Bouas-Laurent, H., Eds.; Elsevier: Amsterdam, 1990; pp 64-164, and references therein.
    • (1990) Photochroism-Molecules and Systems , pp. 64-164
    • Saltiel, J.1    Sun, Y.-P.2
  • 2
    • 0040232920 scopus 로고
    • and references therein
    • Waldeck, D. H. Chem. Rev 1991, 91, 415-436, and references therein.
    • (1991) Chem. Rev , vol.91 , pp. 415-436
    • Waldeck, D.H.1
  • 13
    • 44349155742 scopus 로고    scopus 로고
    • Stilbene radical anions were prepared using electron impact (200 V) in our pulsed molecular apparatus (see ref 14, The trans- or cis-compound was heated (120 or 90°C) under 300 psi helium gas, and the gas mixture was then introduced into vacuum through an Even-Lavie pulsed nozzle at 20 Hz. For selection, the anions were directed to the time-of-flight mass spectrometer through a skimmer and interrogated by the two fs laser pulses pump: 400 nm, ∼1.5 mJ; probe: 800 nm, ∼1.5 mJ, Photoelectrons were analyzed using a magnetic bottle spectrometer
    • Stilbene radical anions were prepared using electron impact (200 V) in our pulsed molecular apparatus (see ref 14). The trans- or cis-compound was heated (120 or 90°C) under 300 psi helium gas, and the gas mixture was then introduced into vacuum through an Even-Lavie pulsed nozzle at 20 Hz. For selection, the anions were directed to the time-of-flight mass spectrometer through a skimmer and interrogated by the two fs laser pulses (pump: 400 nm, ∼1.5 mJ; probe: 800 nm, ∼1.5 mJ). Photoelectrons were analyzed using a magnetic bottle spectrometer.
  • 15
    • 44349135448 scopus 로고    scopus 로고
    • DFT calculations with geometry optimization of trans- and cis-stilbene radical anions, and single-point energy of the neutral form, were performed using GAUSSIAN98 at the B3LYP/6-31G+(d,p) level of theory: Frisch, M. J. Gaussian98, revision A.9; Gaussian Inc.: Pittsburgh, PA, 1998.
    • DFT calculations with geometry optimization of trans- and cis-stilbene radical anions, and single-point energy of the neutral form, were performed using GAUSSIAN98 at the B3LYP/6-31G+(d,p) level of theory: (Frisch, M. J. Gaussian98, revision A.9; Gaussian Inc.: Pittsburgh, PA, 1998.
  • 16
    • 44349099589 scopus 로고    scopus 로고
    • The peak of the trans-isomer at ∼1.5eV eKE is 0.9 eV higher in electron binding energy (eBE) when compared to the major peak at 0.6eV eKE. However, the energy gap of S1-S0 or T1-S 0 is higher than 0.9 eV. Thus, it is not due to the photodetachment of the electronically excited neutral states (S1 or T1, However, it is possible that autodetachment through the hot D1 or D0 state will produce this peak whose position and intensity are determined by the Franck-Condon overlap between the hot anion (D1 or D0) and neutral (S0) state
    • 0) state.
  • 17
    • 44349131340 scopus 로고    scopus 로고
    • The observed transient behavior in windows II and III represents both the fs response of the D2 state, which should match the decay in window I (see text, and the prompt photodetachment (for window II, as expected. 6 For the window III, since it is at the probe region, the transient should be dominated by the photodetachment. However, the additional decay can be understood given the fact that the energy difference between windows I and III (∼2.4 eV) is consistent with the energy separation between the T1 and S0 state (2.2 and 2.4eV for trans- and cis-stilbene, respectively) of the neutral molecules. Thus, the decay should be that of the D2 population, but with different probing probe photon detaches the anion to the neutral T1, instead of S 0, and results in electron of lower eKE, as observed here
    • 0, and results in electron of lower eKE), as observed here.
  • 18
    • 44349132565 scopus 로고    scopus 로고
    • Kim, H. J.; Staib, A.; Hynes, J. T. In Femtochemistry and Femtobiology: Ultrafast Reaction Dynamics at Atomic-Scale Resolution; Sundström, V., Ed.; Imperial College Press: Bjorkbörn, Sweden, 1996; pp 510-527, and references therein.
    • Kim, H. J.; Staib, A.; Hynes, J. T. In Femtochemistry and Femtobiology: Ultrafast Reaction Dynamics at Atomic-Scale Resolution; Sundström, V., Ed.; Imperial College Press: Bjorkbörn, Sweden, 1996; pp 510-527, and references therein.
  • 19
    • 44349138601 scopus 로고    scopus 로고
    • Eisenthal, K, B. In Femtochemistry and Femtobiology: Ultrafast Reaction Dynamics at Atomic-Seale Resolution; Sundström, V., Ed.; Imperial College Press: Bjorkbörn, Sweden, 1996; pp 560-596, and references therein.
    • Eisenthal, K, B. In Femtochemistry and Femtobiology: Ultrafast Reaction Dynamics at Atomic-Seale Resolution; Sundström, V., Ed.; Imperial College Press: Bjorkbörn, Sweden, 1996; pp 560-596, and references therein.

* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.