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research article
Helical electronic transitions of spiroconjugated molecules
May 27, 2021
The two pi-systems of allene can combine into helical molecular orbitals (MOs), yet the helicity is lost in the pi-pi* transitions due to excited state mixing. In spiroconjugated molecules the relative orientation of the two pi-systems is different and consequently only half the pi-MOs become helical. We show that the helicity of the electronic transitions of methyl-substituted spiropentadiene is symmetry protected. As a result, helical pi-conjugation can manifest in observable electronic and chiroptical properties.
Type
research article
Web of Science ID
WOS:000657903800001
Authors
Publication date
2021-05-27
Publisher
Published in
Volume
57
Issue
52
Start page
6408
End page
6411
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
June 19, 2021
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