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<p>The present study aims at synthesizing nickel complex with 3,5-bis(2-benzothiazolyl) pyridine (BTP) ligand, supported on mesoporous TiO<sub>2</sub> (Ni-BTP@m-TiO<sub>2</sub>). Firstly, mesoporous TiO<sub>2</sub> (m-TiO<sub>2</sub>) was synthesized by sol–gel method. Cetyltrimethylammonium bromide was used as a template agent in the preparation process of the mTiO<sub>2</sub>. Next, <i>n</i>-PrCl-M-TiO<sub>2</sub> was prepared by functionalization of mesoporous TiO<sub>2</sub> with Cl(CH<sub>2</sub>)<sub>3</sub>Si(OCH<sub>3</sub>)<sub>3</sub>. Then, <i>n</i>PrCl-m-TiO<sub>2</sub> reacted with 3,5-bis(2-benzothiazolyl) pyridine to give BTP@m-TiO<sub>2</sub>. Finally, Ni was loaded onto the synthesized BTP@m-TiO<sub>2</sub> to prepare Ni-BTP@m-TiO<sub>2</sub>. The structural and physicochemical properties of the prepared nanocomposite were characterized using XRD, SEM, TEM, FT-IR, TGA, EDX, elemental mapping, and BET analyses. Ni-BTP@m-TiO<sub>2</sub>. exhibited efficient catalytic activity in the synthesis of 1,8-dioxo-octahydroxanthenes via the condensation reaction of dimedone and aldehyde derivatives. Its recoverability was examined in several runs, which showed no appreciable loss after six runs.</p>

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Synthesis and characterization of immobilized Ni (II) complex on mesoporous TiO2 as a novel nanocatalyst and its application for the green synthesis of 1,8-dioxo-octahydroxanthenes

  • 期刊论文

  • 发表日期：

    2026年6月21日

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  • Farzaneh Tayebi,
  • Mahnaz Farahi,
  • Zahra Dehbanipour

摘要

The present study aims at synthesizing nickel complex with 3,5-bis(2-benzothiazolyl) pyridine (BTP) ligand, supported on mesoporous TiO2 (Ni-BTP@m-TiO2). Firstly, mesoporous TiO2 (m-TiO2) was synthesized by sol–gel method. Cetyltrimethylammonium bromide was used as a template agent in the preparation process of the mTiO2. Next, n-PrCl-M-TiO2 was prepared by functionalization of mesoporous TiO2 with Cl(CH2)3Si(OCH3)3. Then, nPrCl-m-TiO2 reacted with 3,5-bis(2-benzothiazolyl) pyridine to give BTP@m-TiO2. Finally, Ni was loaded onto the synthesized BTP@m-TiO2 to prepare Ni-BTP@m-TiO2. The structural and physicochemical properties of the prepared nanocomposite were characterized using XRD, SEM, TEM, FT-IR, TGA, EDX, elemental mapping, and BET analyses. Ni-BTP@m-TiO2. exhibited efficient catalytic activity in the synthesis of 1,8-dioxo-octahydroxanthenes via the condensation reaction of dimedone and aldehyde derivatives. Its recoverability was examined in several runs, which showed no appreciable loss after six runs.