M(C_6H_(16)N_3)_2(VO _3)_4 as heterogeneous catalysts. Study of three new hybrid vanadates of cobalt(ii), nickel(ii) and copper(ii) with 1-(2-aminoethyl) piperazonium

Larrea E.S.; Mesa J.L.; Pizarro J.L.; Iglesias M.; Rojo T.; Arriortua M.I.

首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >M(C_6H_(16)N_3)_2(VO _3)_4 as heterogeneous catalysts. Study of three new hybrid vanadates of cobalt(ii), nickel(ii) and copper(ii) with 1-(2-aminoethyl) piperazonium

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M(C_6H_(16)N_3)_2(VO _3)_4 as heterogeneous catalysts. Study of three new hybrid vanadates of cobalt(ii), nickel(ii) and copper(ii) with 1-(2-aminoethyl) piperazonium

机译：M（C_6H_（16）N_3）_2（VO _3）_4作为多相催化剂。 1-（2-氨基乙基）哌嗪对钴（ii），镍（ii）和铜（ii）的三种新型混合钒酸盐的研究

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Three new hybrid vanadates have been synthesized under hydrothermal conditions with the formula M(C_6H_(16)N_3) _2(VO_3)_4, where M = Co(ii), Ni(ii) and Cu(ii). The structural analyses show that the phases are isostructural and crystallize in the monoclinic space group P2_1/c. These compounds show a two-dimensional crystal structure, with sheets composed of [VO_3] _n~(n-) chains and metal centres octahedrally coordinated, chelated by two 1-(2-aminoethyl)piperazonium ligands. The thermal study reveals that the copper containing phase is less stable than the cobalt and nickel containing ones. The IR spectra of the three phases are very similar, with little differences in the inorganic bond region of the copper containing phase. The UV-visible spectra show that the cobalt(ii) and the nickel(ii) are in slightly distorted octahedral environments. The catalytic tests show that the phases act as heterogeneous catalysts for the selective oxidation of alkyl aryl sulfides, with both H_2O_2 and tert-butylhydroperoxide as oxidizing agents. The influence of the steric hindrance in the kinetic profile has been studied. The catalytic reactions induce the partial amorphization of the phases.

机译：在水热条件下合成了三种新的钒酸钒，分子式为M（C_6H_（16）N_3）_2（VO_3）_4，其中M = Co（ii），Ni（ii）和Cu（ii）。结构分析表明，在单斜空间群P2_1 / c中，相是同构的并且是结晶的。这些化合物显示出二维晶体结构，由[VO_3] _n〜（n-）链和八面体配位的金属中心组成的薄片，被两个1-（2-氨基乙基）哌嗪配体螯合。热学研究表明，含铜相的稳定性低于含钴和镍的相。三相的红外光谱非常相似，含铜相的无机键区几乎没有差异。紫外可见光谱表明，钴（ii）和镍（ii）处于稍微扭曲的八面体环境中。催化试验表明，这些相充当了烷基芳基硫醚选择性氧化的非均相催化剂，H_2O_2和叔丁基氢过氧化物均作为氧化剂。研究了空间位阻对动力学曲线的影响。催化反应引起相的部分非晶化。

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《Dalton transactions: An international journal of inorganic chemistry》 |2011年第47期|共9页
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Larrea E.S.; Mesa J.L.; Pizarro J.L.; Iglesias M.; Rojo T.; Arriortua M.I.;
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M(C_6H_(16)N_3)_2(VO _3)_4 as heterogeneous catalysts. Study of three new hybrid vanadates of cobalt(ii), nickel(ii) and copper(ii) with 1-(2-aminoethyl) piperazonium

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