e.g. Filippa Pettersson or Cancer Res. 75(6) , 1102-12, (2015) or 10.1002/anie.201600521
Development of a solar energy storage process. Photoisomerization of a norbornadiene derivative to a quadricyclane derivative in an aqueous alkaline solution
Summary The triplet-singlet energy gap in diarylcarbenes can be enhanced by substitution of methyl groups at the ortho positions of the aromatic rings. Substitution of this kind forces an expansion of the central CCC angle of the carbene which, in turn, leads to an increase in the triplet-singlet energy gap. The effect is manifest in both the EPR spectra of the carbenes and in their chemistry.
