(NH₄)₂Cd₂Cl₃F₃ and (NH₄)₂Cd₂Br₃F₃: The First Fluoride-Containing d¹⁰ Metal Mixed Halides Exhibiting Superior Ultraviolet Nonlinear Optical Properties.

ABSTRACT: In the search for new ultraviolet (UV) nonlinear optical (NLO) materials, two novel cadmium mixed halide compounds, (NH₄)₂Cd₂Cl₃F₃ and (NH₄)₂Cd₂Br₃F₃, are successfully synthesized via hydrothermal methods. These compounds crystallize in the noncentrosymmetric (NCS) space group, R32, and are composed of distorted octahedral [CdX₃F₃] (X═Cl or Br) units, which extend into a 3D framework. Remarkably, both compounds demonstrate strong second-harmonic generation (SHG) efficiencies-3.0 and 8.0 times that of KH₂PO₄ for the Cl- and Br-containing analogs, respectively-with phase-matching behavior observed. The SHG efficiency is attributed to the hi

SUBMITTER: Choi S 

PROVIDER: S-EPMC11923861 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature