References

General ChemistryCatalysisOrganic Chemistry

New 3π‐2Spiro Ladder‐Type Phenylene Materials: Synthesis, Physicochemical Properties and Applications in OLEDs

Published in Chemistry – A European Journal
Authors Nicolas Cocherel, Cyril Poriel, Joëlle Rault‐Berthelot, Frédéric Barrière, Nathalie Audebrand, Alexandra M. Z. Slawin, Laurence Vignau

AbstractNew routes to ladder‐type phenylene materials 1 and 2 are described. The oligomers 1 and 2, which possess a “3π‐2spiro” architecture, have been synthesized by using extended diketone derivatives 3 and 10 as key intermediates. The physicochemical properties of the new blue‐light emitter 2 were studied in detail and compared with those of the less‐extended 1. Owing to the recent development of fluorenone derivatives and their corresponding more conjugated analogues as potential electron‐transport materials in organic light‐emitting diodes (OLEDs) and as n‐type materials for photovoltaic applications, we also report herein the thermal, optical and electrochemical behavior of the key intermediates, diketones 3 and 10. Finally, the application of dispiro 2 as a new light‐emitting material in OLEDs is reported.

The Houk–List transition states for organocatalytic mechanisms revisited

Published in Chem. Sci.
Authors Alan Armstrong, Roberto A. Boto, Paul Dingwall, Julia Contreras-García, Matt J. Harvey, Nicholas J. Mason, Henry S. Rzepa

The ten year old Houk–List model for rationalising the origin of stereoselectivity in the organocatalysed intermolecular aldol addition is revisited, using a variety of computational techniques that have been introduced or improved since the original study.