Molecular Crystals and Liquid Crystals Science and Technology Section B: Nonlinear Optics

Hyperpolarizabilities of tolanes and pyridyl analogues


The nonlinear optical properties of 15 donor-acceptor diphenylacetylenes (tolanes) and three pyridyl analogues have been measured by the EFISH technique. The results are compared with those for other tolanes measured in other laboratories. The relative abilities of donor and acceptor groups to influence molecular hyperpolarizabilities is discussed, as is the trade-off between nonlinearity and transparency and the utility of this class of molecules in the fabrication of optoelectronic devices.