K2Pb3(CO3)3F2 and KCdCO3F: Novel Fluoride Carbonates with Layered and 3D Framework Structures
Yuan Lin1, Chun-Li Hu1, Jiang-Gao Mao1
1State Key Laboratory of Structural Chemistry, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences , Fuzhou 350002, People's Republic of China.
Inorganic Chemistry
|October 22, 2015
Summary
Two novel mixed metal fluoride carbonates, KCdCO3F and K2Pb3(CO3)3F2, were synthesized. KCdCO3F exhibits promising UV nonlinear optical properties, making it suitable for advanced laser applications.
Area of Science:
- Solid-state chemistry
- Materials science
- Crystallography
Background:
- Mixed metal fluoride carbonates are an emerging class of functional materials.
- Understanding their structural and optical properties is crucial for developing new applications.
Purpose of the Study:
- To synthesize and characterize two new mixed metal fluoride carbonates: KCdCO3F and K2Pb3(CO3)3F2.
- To investigate their structural, optical, and nonlinear optical properties.
Main Methods:
- Solvothermal and solid-state synthesis techniques.
- X-ray crystallography for structural determination.
- UV-vis diffuse reflectance spectroscopy.
- Second harmonic generation (SHG) measurements.
Main Results:
- KCdCO3F crystallizes in the acentric P6̅m2 space group with a 3D anionic framework.
- K2Pb3(CO3)3F2 crystallizes in the centrosymmetric P63/mmc space group with a layered anionic skeleton.
- KCdCO3F exhibits short-wavelength absorption edge at 227 nm and a significant SHG response (5.2 times KDP at 532 nm).
Conclusions:
- KCdCO3F is a phase-matchable material with a large SHG response, indicating its potential as a UV nonlinear optical material.
- KCdCO3F is a promising candidate for fourth harmonic generation applications with 1064 nm lasers.
- The structural and optical properties of these new compounds provide insights into the design of functional fluoride carbonates.
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