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Updated: May 22, 2025
Synthesis of High Purity Nonsymmetric Dialkylphosphinic Acid Extractants
Published on: October 19, 2017
Two mixed P-O anionic phosphates with a distinctive structural transformation and deep ultraviolet cutoff edge
Lei Wu1, Hongyu Huang1, Jialong Wang1
1Key Laboratory of Oil & Gas Fine Chemicals, Ministry of Education & Xinjiang Uyghur Autonomous Region, School of Chemical Engineering and Technology & Xinjiang Key Laboratory of Solid State Physics and Devices, School of Physical Science and Technology, Xinjiang University, Urumqi 830017, China. chenzhaohui@xju.edu.cn.
Two novel mixed P-O anionic phosphates, Na3Cd4(PO4)(P2O7)2 and Na4Mg3(PO4)2(P2O7), were synthesized. These materials show potential for nonlinear optical applications due to their short UV cutoff edges and SHG properties.
Area of Science:
- Solid-state chemistry
- Materials science
- Inorganic chemistry
Background:
- Mixed P-O anionic phosphates are crucial for optical materials.
- Understanding structure-property relationships is key for designing new materials.
- Previous research has explored various phosphate structures for optical applications.
Purpose of the Study:
- To synthesize and characterize novel mixed P-O anionic phosphates.
- To investigate the structural evolution from disorder to order.
- To evaluate their optical properties, particularly UV cutoff and second harmonic generation (SHG).
Main Methods:
- High-temperature solution synthesis method.
- X-ray diffraction for structural analysis.
- UV-Vis spectroscopy for optical property evaluation.
- Second Harmonic Generation (SHG) measurements.
Main Results:
- Successful synthesis of Na3Cd4(PO4)(P2O7)2 and Na4Mg3(PO4)2(P2O7).
- Observed structural transitions from disorder to order with symmetry shifts.
- Achieved shortest UV cutoff edges (<190 nm) among mixed P-O anionic phosphates.
- Na4Mg3(PO4)2(P2O7) demonstrated moderate SHG efficiency (approx. 0.5 × KDP) with phase-matching ability.
Conclusions:
- The synthesized compounds represent new additions to the family of mixed P-O anionic phosphates.
- Their unique structural features contribute to excellent UV transparency.
- Na4Mg3(PO4)2(P2O7) shows promise as a material for nonlinear optical devices.
