Molybdenum- and tungsten-containing (M₇O₂₄^6-, M = Mo or W) layered double hydroxides (LDHs) with Mg²⁺ and Al³⁺ cations in the brucite-like layer have been prepared by direct anion exchange, starting from the corresponding terephthalate precursor. The solids have been characterized by various instrumental techniques such as elemental chemical analysis, powder X-ray diffraction, infrared spectroscopy, scanning electron microscopy, transmission electron microscopy and thermogravimetric analysis. The M₇O₂₄^6- intercalated LDHs have been explored as catalysts for the selective oxidation of a series of alkenes at room temperature using safer, inexpensive and environmentally benign hydrogen peroxide as oxidant. Reaction conditions have been optimized considering different reaction parameters to achieve maximum conversion in the catalytic oxidation reaction. Recycling of the catalyst has shown that it can be reused up to three more cycles without significant loss of performance.

中文翻译：

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含钼和钨的层状双氢氧化物：烯烃与 H2O2 的温和选择性氧化

已经通过直接阴离子交换制备了含钼和钨（M ₇ O ₂₄ ^6-，M = Mo 或 W）层状双氢氧化物 (LDHs)，在类水镁石层中具有Mg ²⁺和 Al ³⁺阳离子，起始来自相应的对苯二甲酸酯前体。固体已通过各种仪器技术表征，例如元素化学分析、粉末 X 射线衍射、红外光谱、扫描电子显微镜、透射电子显微镜和热重分析。M ₇ O ₂₄ ^6-已经探索了嵌入的 LDH 作为催化剂在室温下使用更安全、廉价和环境友好的过氧化氢作为氧化剂选择性氧化一系列烯烃。考虑到不同的反应参数，优化了反应条件，以实现催化氧化反应的最大转化率。催化剂的回收表明，它可以再使用三个循环而不会显着降低性能。