A metal-organic framework (MOF) material was integrated with surface superhydrophobicity, high surface areas, large and uniform pore sizes, and excellent stability. This synthetic procedure was completed via an encapsulationrearrangement strategy. Benefiting from the superhydrophobicity, this MOF could be stable in humid environments and maintained its mesoporosity and surface areas for at least 6 months. The MOF-modified sponge has great potential in applications such as oil/water separation, water remediation, and heterogeneous catalysis.
A family of oxazaborines, diazaborinones, triazaborines, and triazaborinones was prepared by reaction of polarized ethylenes, such as β-enaminoamides, with 4-methylbenzenediazonium tetraphenylborates. The reaction conditions (stirring in CH2Cl2 at room temperature (Method A) or stirring with CH3COONa in CH2Cl2 at room temperature (Method B) or refluxing in the CH2Cl2/toluene mixture (Method C)) controlled the formation and relative content of these compounds in the reaction mixtures from one to three products. Substituted oxazaborines gradually rearranged into diazaborinones at 250 °C. The prepared compounds were characterized by 1H NMR, 13C NMR, IR, and UV–Vis spectroscopy, HRMS, or microanalysis. The structure of individual compounds was confirmed by 11B NMR, 15N NMR, 1D NOESY, and X-ray analysis. The mechanism of reaction of enaminoamides with 4-methylbenzenediazonium tetraphenylborate was proposed.
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