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Organic benzene-based octopoles for nonlinear optics

The last little more than five years have seen an outstanding advance in the design of NLO-active organic molecules with octopolar symmetry, despite the often pessimistic predictions for the practical application potential of organic molecular materials. This contribution aims to review the latest developments, and, with special emphasis on efficient bulk materials based on functional molecules, tries to point out promising developments and strategies in order to promote organic molecular materials as useful candidates in modern nonlinear optics.