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Vibrationally Coherent Photochemistry in the Femtosecond Primary Event of Vision

Wang, Qing, Schoenlein, Robert W., Peteanu, Linda A., Mathies, Richard A., Shank, Charles V.·1994·Science

Abstract

Femtosecond pump-probe experiments reveal the impulsive production of photoproduct in the primary event in vision. The retinal chromophore of rhodopsin was excited with a 35-femtosecond pulse at 500 nanometers, and transient changes in absorption were measured with 10-femtosecond probe pulses. At probe wavelengths within the photoproduct absorption band, oscillatory features with a period of 550 femtoseconds (60 wavenumbers) were observed whose phase and amplitude demonstrate that they are the result of nonstationary vibrational motion in the ground state of the photoproduct. The observation of coherent vibrational motion of the photoproduct supports the idea that the primary step in vision is a vibrationally coherent process and that the high quantum yield of the cis→trans isomerization in rhodopsin is a consequence of the extreme speed of the excited-state torsional motion.

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Metadata

Authors
Wang, Q., Schoenlein, R. W., Peteanu, L. A., Mathies, R. A., & Shank, C. V.
Venue
Science
Published
1994-10-21
Volume
266
Issue
5184
Pages
422-424
ISSN
  • 0036-8075 (ISSN-L)
  • 1095-9203
OpenAlex
W1990867492
Cited by
636
References
2
FWCI
6.11
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Vibrationally Coherent Photochemistry in the Femtosecond Primary Event of Vision. https://app.cochat.ai/papers/10.1126/science.7939680
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Wang, Q., Schoenlein, R. W., Peteanu, L. A., Mathies, R. A., & Shank, C. V. (1994). Vibrationally Coherent Photochemistry in the Femtosecond Primary Event of Vision. Science. https://doi.org/10.1126/science.7939680

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