The optical activity of β,γ-enones in ground and excited states using circular dichroism and circularly polarized luminescence

Literature Information

Publication Date 2010-10-29
DOI 10.1039/C0CP01149E
Impact Factor 3.676
Authors

Kenneth Ruud


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Abstract

The circularly polarized luminescence (CPL) and electronic circular dichroism (CD) spectroscopic parameters corresponding to the n ← π* and n → π* transitions, respectively, have been calculated for selected β,γ-enones using density functional theory. For the smallest β,γ-enone, (1R,4R)-bicyclo[2.2.1]hept-5-en-2-one (norbornenone), coupled-cluster calculations have also been carried out. The excited-state potential energy surface for three of the five enones studied reveals two minima with different CO⋯CC dihedral angles, and with rotatory strengths of opposite sign. The relative energies of the minima determine the sign of the CPL intensity, which may be the same or opposite as in the CD spectrum, in agreement with experimental data. The results obtained in this first computational study of CPL demonstrate its usefulness as an indicator of excited-state structures of chiral species.

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Physical Chemistry Chemical Physics

Physical Chemistry Chemical Physics
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