| Autor: |
Anokhin MV; Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States., Nesterov EE; Department of Chemistry and Biochemistry, Northern Illinois University, DeKalb, Illinois 60115, United States. |
| Jazyk: |
angličtina |
| Zdroj: |
The journal of physical chemistry letters [J Phys Chem Lett] 2020 Oct 15; Vol. 11 (20), pp. 8745-8750. Date of Electronic Publication: 2020 Sep 30. |
| DOI: |
10.1021/acs.jpclett.0c02473 |
| Abstrakt: |
Photochemical reactions are intrinsically difficult to control because they involve high-energy excited-state species. Herein we report a novel approach toward controlling photochemical reactions via using the spatially selective excitation of specific electronic transitions. This can be performed using photochemical irradiation with the plane-polarized light of a photoreactive compound uniformly aligned in a nematic liquid-crystalline (LC) medium. Having chosen cyclopropenone photodecarbonylation as a proof-of-concept reaction, we demonstrated that it could be controlled via changing an angle between the incident light polarization plane and the LC director. We showed that two specific partially forbidden electronic transitions were mostly responsible for this photochemical reaction. We envision that this simple general method can be useful in experimental studies of the fundamental details of various photochemical processes and can help to increase the selectivity of photochemical transformations. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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