Scholarlink

<p>Two organic–inorganic hybrids, PDA/[SiW<sub>9</sub>M<sub>3</sub>(PDA)<sub>3</sub>O<sub>37</sub>], were synthesized through the self-assembly of the [SiW<sub>9</sub>O<sub>34</sub>]<sup>10−</sup> anion and M = Co(II) (<b>1</b>), Ni(II) (<b>2</b>), in the presence of para-phenylenediamine (PDA) as the organic component, and characterized. The structure of the hybrids was investigated by means of FT-IR spectroscopy, X-ray diffraction analysis (XRD), field emission scanning electron (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and N<sub>2</sub> adsorption-desorption studies. To further investigate structural connectivity, the composites <b>1a</b> and <b>2a</b> were obtained by calcining <b>1</b> and <b>2</b> at 400&#xa0;°C and studied. A comparison of nitrogen adsorption/desorption studies of <b>2a</b> and <b>2</b> showed that the BET surface area and pore texture were improved by calcination. Catalytic activity studies showed that the as-synthesized organic–inorganic hybrids efficiently catalyzed the synthesis of various 1&#xa0;H-5-substituted tetrazole derivatives in good to excellent yields (40–98%) under mild conditions. The catalysts were reused for up to five consecutive cycles with only a slight decrease in catalytic activity under the tested conditions. These results demonstrate that the prepared catalytic system can serve as a useful heterogeneous catalyst for tetrazole synthesis.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Synthesis, characterization, and catalytic performance of cobalt and nickel-substituted polyoxometalates organic-inorganic nanohybrids

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月9日

查看全文
  • Parasto Gharaei,
  • Sahar Mohammadzadeh,
  • Roushan Khoshnavazi,
  • Somayeh Molaei

摘要

Two organic–inorganic hybrids, PDA/[SiW9M3(PDA)3O37], were synthesized through the self-assembly of the [SiW9O34]10− anion and M = Co(II) (1), Ni(II) (2), in the presence of para-phenylenediamine (PDA) as the organic component, and characterized. The structure of the hybrids was investigated by means of FT-IR spectroscopy, X-ray diffraction analysis (XRD), field emission scanning electron (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and N2 adsorption-desorption studies. To further investigate structural connectivity, the composites 1a and 2a were obtained by calcining 1 and 2 at 400 °C and studied. A comparison of nitrogen adsorption/desorption studies of 2a and 2 showed that the BET surface area and pore texture were improved by calcination. Catalytic activity studies showed that the as-synthesized organic–inorganic hybrids efficiently catalyzed the synthesis of various 1 H-5-substituted tetrazole derivatives in good to excellent yields (40–98%) under mild conditions. The catalysts were reused for up to five consecutive cycles with only a slight decrease in catalytic activity under the tested conditions. These results demonstrate that the prepared catalytic system can serve as a useful heterogeneous catalyst for tetrazole synthesis.