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Conformer-specific photochemistry imaged in real space and time.

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Title: Conformer-specific photochemistry imaged in real space and time.
Authors: Champenois, E. G., Sanchez, D. M., Yang, J., Nunes, J. P. Figueira, Attar, A., Centurion, M., Forbes, R., Gühr, M., Hegazy, K., Ji, F., Saha, S. K., Liu, Y., Lin, M.-F., Luo, D., Moore, B., Shen, X., Ware, M. R., Wang, X. J., Martínez, T. J., Wolf, T. J. A.
Source: Science (pre-March 2025). 10/8/2021, Vol. 374 Issue 6564, p178-182. 5p. 5 Diagrams.
Subjects: Conformational isomers, Organic chemistry, Chemical reactions, Photochemistry, Electrocyclic reactions (Chemistry)
Abstract: Conformational isomers (conformers) of molecules play a decisive role in biology and organic chemistry. However, experimental methods for investigating chemical reaction dynamics are typically not conformer-sensitive. We report on a gas-phase megaelectronvolt ultrafast electron diffraction investigation of a-phellandrene undergoing an electrocyclic ring-opening reaction. We directly imaged the evolution of a specific set of a-phellandrene conformers into the product isomer predicted by the Woodward-Hoffmann rules in real space and time. Our experimental results are in quantitative agreement with nonadiabatic quantum molecular dynamics simulations, which provide considerable detail of how conformation influences the time scale and quantum efficiency of photoinduced ring-opening reactions. [ABSTRACT FROM AUTHOR]
Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Conformer-specific photochemistry imaged in real space and time.
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  Data: <searchLink fieldCode="AR" term="%22Champenois%2C+E%2E+G%2E%22">Champenois, E. G.</searchLink><br /><searchLink fieldCode="AR" term="%22Sanchez%2C+D%2E+M%2E%22">Sanchez, D. M.</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+J%2E%22">Yang, J.</searchLink><br /><searchLink fieldCode="AR" term="%22Nunes%2C+J%2E+P%2E+Figueira%22">Nunes, J. P. Figueira</searchLink><br /><searchLink fieldCode="AR" term="%22Attar%2C+A%2E%22">Attar, A.</searchLink><br /><searchLink fieldCode="AR" term="%22Centurion%2C+M%2E%22">Centurion, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Forbes%2C+R%2E%22">Forbes, R.</searchLink><br /><searchLink fieldCode="AR" term="%22Gühr%2C+M%2E%22">Gühr, M.</searchLink><br /><searchLink fieldCode="AR" term="%22Hegazy%2C+K%2E%22">Hegazy, K.</searchLink><br /><searchLink fieldCode="AR" term="%22Ji%2C+F%2E%22">Ji, F.</searchLink><br /><searchLink fieldCode="AR" term="%22Saha%2C+S%2E+K%2E%22">Saha, S. K.</searchLink><br /><searchLink fieldCode="AR" term="%22Liu%2C+Y%2E%22">Liu, Y.</searchLink><br /><searchLink fieldCode="AR" term="%22Lin%2C+M%2E-F%2E%22">Lin, M.-F.</searchLink><br /><searchLink fieldCode="AR" term="%22Luo%2C+D%2E%22">Luo, D.</searchLink><br /><searchLink fieldCode="AR" term="%22Moore%2C+B%2E%22">Moore, B.</searchLink><br /><searchLink fieldCode="AR" term="%22Shen%2C+X%2E%22">Shen, X.</searchLink><br /><searchLink fieldCode="AR" term="%22Ware%2C+M%2E+R%2E%22">Ware, M. R.</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+X%2E+J%2E%22">Wang, X. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Martínez%2C+T%2E+J%2E%22">Martínez, T. J.</searchLink><br /><searchLink fieldCode="AR" term="%22Wolf%2C+T%2E+J%2E+A%2E%22">Wolf, T. J. A.</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Science+%28pre-March+2025%29%22">Science (pre-March 2025)</searchLink>. 10/8/2021, Vol. 374 Issue 6564, p178-182. 5p. 5 Diagrams.
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  Data: Conformational isomers (conformers) of molecules play a decisive role in biology and organic chemistry. However, experimental methods for investigating chemical reaction dynamics are typically not conformer-sensitive. We report on a gas-phase megaelectronvolt ultrafast electron diffraction investigation of a-phellandrene undergoing an electrocyclic ring-opening reaction. We directly imaged the evolution of a specific set of a-phellandrene conformers into the product isomer predicted by the Woodward-Hoffmann rules in real space and time. Our experimental results are in quantitative agreement with nonadiabatic quantum molecular dynamics simulations, which provide considerable detail of how conformation influences the time scale and quantum efficiency of photoinduced ring-opening reactions. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1126/science.abk3132
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        Text: English
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      – SubjectFull: Chemical reactions
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      – SubjectFull: Photochemistry
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