Stabilization of oxidized ruthenium complexes by adsorption on clay minerals

Stabilization of oxidized ruthenium complexes by adsorption on clay minerals
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通过粘土矿物吸附稳定氧化钌络合物

DOI:
10.1016/j.clay.2020.105869
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发表时间:
2020
影响因子:
5.6
通讯作者:
H. Yuge plexes by adsorption on clay minerals,
H. Yuge plexes by adsorption on clay minerals,
中科院分区:
地球科学2区
文献类型:
--
作者:
Kiyozumi Takuya;Kudo Shinji;Mori Aska;Mizoguchi Riku;Tahara Atsushi;Asano Shusaku;Hayashi Jun-ichiro;阿部朋也・久保和幸・水田勉;H. Yuge plexes by adsorption on clay minerals,

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采用两种方法(方法A和方法B)研究了原位氧化钌配合物在蒙脱土钠(Na-Mt)上的吸附,以建立一种稳定氧化化合物的通用方法。以硝酸铈铵(CAN)对1-钌和2-钌进行原位氧化制备的[Ru(acac)3]+(1-Ru+)和[Ru(acac)2(hino)]+(2-Ru+, Hhino =桧木醇)为模型。在方法A中,将含有氧化钌配合物的乙腈溶液加入到Na-Mt的水性胶体溶液中,然后进行过滤和风干。在方法B中,将含有氧化配合物的乙腈溶液滴铸在Na-Mt粉末上,然后进行研磨和风干。两种方法都很难吸附1-Ru+,可能是由于1-Ru+在溶液中的寿命较短。相反,当采用B方法时,2-Ru+被吸附在mt2上。x射线衍射分析表明,2- ru +不仅存在于层间空间,而且存在于tem粒子的表面或边缘。根据拉曼光谱,铸造样品中的2- ru +配合物,包括未插入的配合物,至少在一周内是稳定的,而没有插入m的2- ru +在固体状态下在一天内恢复为2- ru。mt粒子的“纸牌屋”状结构的形成被认为是铸造样品中非插层2- ru +配合物稳定的原因之一。
Adsorption ofin situoxidized ruthenium complexes on sodium montmorillonite (Na-Mt) was examined using two approaches (methods A and B) in order to establish a versatile method for stabilizing oxidized compounds. [Ru(acac)3]+(1-Ru+) and [Ru(acac)2(hino)]+(2-Ru+, Hhino = hinokitiol), which were each prepared byin situoxidation of1-Ruand2-Ruwith ammonium cerium(IV) nitrate (CAN), were used as models of oxidized compounds. In method A, an acetonitrile solution containing oxidized ruthenium complexes was added to an aqueous colloidal solution of Na-Mt, followed by filtering and air drying. In method B, an acetonitrile solution containing the oxidized complexes was drop-casted on powders of Na-Mt, followed by grinding and air drying.1-Ru+was hardly adsorbed onMtin both methods, probably owing to the short lifetime of1-Ru+in solution. In contrast,2-Ru+was adsorbed onMtwhen method B was applied. X-ray diffraction analysis indicated that2-Ru+existed not only in the interlayer space but also on the surfaces or edges of theMtparticles. The2-Ru+complexes in the cast sample, including non-intercalated ones, were stable at least for a week according to Raman spectroscopy, whereas2-Ru+withoutMtreturned to2-Ruwithin a day in the solid state. The formation of a “house-of-cards”-like structure ofMtparticles is proposed to be one reason why non-intercalated2-Ru+complexes are stabilized in the cast sample.
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DOI: 10.1006/jcis.2000.7228
发表时间: 2001
影响因子: 9.9
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发表时间: 1992
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发表时间: 1970
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