Self-Assembled Nonlinear Optical Crystals Based on an Asymmetric Fluorenone Derivative
Rongchao Shi, Xiao Han, Puxin Cheng, Mingyang Xin, Jialiang Xu
Abstract
Organic crystals demonstrating efficient nonlinear optical (NLO) effects are highly promising candidates for the next-generation photonics. However, the assembly of NLO molecules with high dipoles in a non-centrosymmetric (NCS) manner for second-order NLO effects remains a formidable challenge. Here, we develop the self-assemblies of a fluorenone derivative, 2-([1,1′-biphenyl]-4-yl)-7-phenyl-fluoren (2-Bp-7-PFO), with an asymmetric configuration, which exhibits efficient second-harmonic generation (SHG) response, large polarization ratio, and outstanding optical stability. Driven by the synergetic intermolecular interactions, 2-Bp-7-PFO molecules arrange in an NCS way with two different morphologies. The exploration of NLO properties of fluorenone derivate with asymmetrical configuration could provide a new platform for the construction of organic NLO materials and devices in the future.