Synthesis and Crystal Structure of a Novel Organic Adduct Nonlinear Optical Material: 3,5-Dinitrobenzonic Acid·ethanolamine (3,5-DNBEA)

1 INTRODUCTION The development of highly efficient nonlinear opti- cal (NLO) crystals for visible and ultraviolet (UV) regions is extremely important for both laser spe- ctroscopy and laser processing. In recent years, many new non-linear optical second harmonic gene- ration (SHG) materials of organic adduct have come out with the following main advantages over the inorganic ones. The main merits of organic materials compared with inorganic ones for such second-har- monic generation d…