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Published on: April 14, 2020
Circularly polarized luminescence of helicenes: A data-informed insight
Matteo Cei1, Lorenzo Di Bari1, Francesco Zinna1
1Dipartimento di Chimica e Chimica Industriale, University of Pisa, Pisa, Italy.
Abstract:
Helicenes are an interesting scaffold for chiroptical properties and in particular circularly polarized luminescence (CPL). In this short review, we collect the luminescence (glum ) and absorption (gabs ) dissymmetry factors associated to the first Cotton effect of the electronic circular dichroism (ECD) spectrum. Considering the data for 170 [n]-helicenes (n = 4-11), overall we found reasonable correlations between glum and gabs . Despite a few notable exceptions, this would confirm a similarity in the stereochemistry of the ground and emitting excited states for most helicenes. These results may be useful in rationalizing chiroptical data and help chemists in designing new helicene structures with the desired CPL properties.
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