Strong optical nonlinearities of self-assembled polymorphic microstructures of phenylethynyl functionalized fluorenones
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摘要:
Highly efficient nonlinear optical (NLO) materials with well-defined architectures in the wavelength and subwavelength length scales are of particular importance for next generation of integrated photonic circuits.Fluorenone analogues have been demonstrated to be promising candidates as building blocks for assembly of organic NLO materials thanks to their synergistic supramolecular interactions and brilliant optical properties.Here we have studied the polymorphs of a phenylethynyl functionalized fluorenone derivative,and their controlled self-assembly for microstructures with different morphologies.These polymorphic microcrystals exhibit very distinctive NLO properties,highly related to their supramolecu-lar and electronic structures.