Synthesis and Electrolysis of K₃NaMgCl₆

High-purity K₃NaMgCl₆ was synthesized from magnesia.The factors affecting the purity of K₃NaMgCl₆ were investigated. The hygroscopic property of K₃NaMgCl₆ was studied. The preparation process of K₃NaMgCl₆ was investigated by X-ray diffraction analysis and differential scanning calorimetry analysis, and the reaction mechanism involved was determined. Then, magnesium metal was prepared by an electrochemical method using K₃NaMgCl₆ as raw material. The electrolytic parameters were measured, and the electrochemical behavior of magnesium ion in K₃NaMgCl₆ molten salt was investigated. Magnesia content in K₃NaMgCl₆ achieved 0.02 wt % under the optimum conditions. K₃NaMgCl₆ had a lower hygroscopy at room temperature and had a lower tendency to hydrolyze at high temperature. The purity of the obtained magnesium metal was 99.4 wt %, and the current efficiency in the electrolysis process was 94.8%

Additional file 1 of Recruitment of general practitioners in China: a scoping review of strategies and challenges

Additional file 1

Additional file 2 of Recruitment of general practitioners in China: a scoping review of strategies and challenges

Additional file 2

Conductive Metal–Organic Framework Microelectrodes Regulated by Conjugated Molecular Wires for Monitoring of Dopamine in the Mouse Brain

Herein, we demonstrated a strategy to regulate the conductive metal–organic framework (MOF) surface, by the conjugated molecule wires for selective and sensitive determination of dopamine (DA) in the live brain. The MOFs were decorated at the carbon fiber electrode deposited by Au nanoleaves as the upper electric transducer to provide rich electrocatalytic sites for electron transfer of neurochemicals at the electrode surface, leading to greatly enhanced sensitivity for detection of neurochemicals. On the other hand, the conjugated molecular wire, 4-(thiophen-3-ylethynyl)-benzaldehyde (RP1), was synthesized and assembled as an underlying bridge to regulate the electrochemical processes at the MOF-based electrode, specifically decreasing the reaction Gibbs free energy of DA oxidation, thus selectively promoting the heterogeneous electron transfer of DA from the MOF layer to the electrode surface. Owing to the electrocatalytic activity for DA oxidation, the present microsensor exhibited high selectivity for real-time tracking of DA in a good linear relationship in the range of 0.004–0.4 μM with a detection limit of 1 nM. Eventually, this functionalized electrode was successfully applied for in vivo monitoring of DA in mouse brains with Parkinson’s disease (PD) model. The results indicated that the levels of DA were obviously decreased in both acute and subacute PD models. Moreover, the level of DA strongly depended on the amount of uric acid (UA), a physiological antioxidant, which rose as the UA amount was lower than 200 mg kg–1 but was downregulated again after treatment by a higher amount of UA