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以溴酸根插层锌铝水滑石为载体构建新溴源体系

DOI: 10.14062/j.issn.0454-5648.2015.05.17

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Abstract:

以溴酸根插层锌铝水滑石(Zn/Al-BrO3–-LDHs)为载体,与Br-等还原剂构建形成新型溴源体系。为实现溴源体系在实际应用中的有效控溴,对Zn/Al-BrO3–-LDHs中BrO3–的释放行为进行了研究,并考察了温度、交换离子类型、pH值等因素对BrO3–释放行为的影响。结果表明升高温度会加快BrO3–的释放,交换离子的交换性越强,BrO3–释放得越快,在pH值为9.0的磷酸盐缓冲溶液中的释放速率要比在pH值为4.0的磷酸盐缓冲溶液中快。采用4种动力学模型对水滑石中BrO3–的释放过程进行动力学拟合,结果表明LDHs-BrO3–中BrO3–的释放行为符合Bhaskar方程,属粒内扩散控制过程。用LDHs-BrO3–/Br–构建的溴源体系合成了3,5-二溴-2-氨基苯甲酸甲酯,收率为94.7%,纯度为99.8%。

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