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Potassium uranyl borate 3D framework compound resulted from temperature directed hydroborate condensation: structure,
Xiaomei Xu1, Zhiyong Liu1, Shitong Yang1
1School for Radiological and Interdisciplinary Sciences (RAD-X) and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education Institutions, Jiangsu 215123, China. shuaowang@suda.edu.cn.
Dalton Transactions (Cambridge, England : 2003)
|October 7, 2016
Summary
Synthesizing a new 3D uranyl borate framework (KUBO-4) at 250 °C reveals interlayer condensation. Uranyl borates show limited stability in aqueous solutions, irrespective of structural type.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Crystallography
Background:
- Uranyl borate frameworks are predominantly 2D layered structures.
- Previous synthesis at 190 °C yielded limited 3D uranyl borate compounds.
Purpose of the Study:
- To synthesize a novel 3D uranyl borate framework by increasing reaction temperature.
- To investigate the structural and dissolution properties of uranyl borates.
Main Methods:
- High-temperature boric acid flux reactions.
- Single crystal X-ray diffraction (XRD).
- Inductively coupled plasma mass spectrometry (ICP-MS), powder XRD, and fluorescence spectroscopy for solubility studies.
Main Results:
- A new 3D potassium uranyl borate, KUBO-4, was synthesized at 250 °C.
- KUBO-4 exhibits interlayer hydroborate condensation, forming a 3D structure.
- Solubility studies demonstrated the instability of uranyl borates in aqueous solutions with coordinating ligands.
Conclusions:
- Elevated temperatures promote the formation of 3D uranyl borate frameworks.
- The stability of uranyl borates is compromised in aqueous environments containing coordinating ligands.
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