Dramatic red-shifted fluorescence of [2.2]paracyclophanes with peripheral substituents attached to the saturated bridges.
A bridge-substituted [2.2]paracyclophane obtained from the organic solid state exhibits a dramatic red shift in fluorescence relative to [2.2]paracyclophane. A further red shift occurs upon alkylation of the pyridylcyclobutyl bridges. Our results demonstrate that [2.2]cyclophanes substituted at the bridge, despite not being attached via the extended pi-system, are promising building blocks in the development of optical materials.
Elacqua
Elizabeth
E
Department of Chemistry and The Optical Science and Technology Center, University of Iowa, Iowa City, Iowa 52242, USA.
Bucar
Dejan-Kresimir
DK
Skvortsova
Yulia
Y
Baltrusaitis
Jonas
J
Geng
M Lei
ML
MacGillivray
Leonard R
LR