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Electrostatic polypyridine–ruthenium(II)?decatungstate dyads: structures, characterizations and photodegradation of dye

机译:静电聚吡啶-钌(II)?decatungstate二联体:染料的结构,表征和光降解

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Two hybrids, [Ru(bpy)2(CH3CN)2]2[W10O32]·2CH3CN (RuW-1) and [Ru(bpy)3]2[W10O32] (RuW-2) (bpy = 2,2′-bipyridine), were synthesized by the reaction of (2,2′-dipyridyl)ruthenium complexes and decatungstate, under hydrothermal conditions, and characterized by IR, UV, fluorescence and transient absorption spectroscopy. The influences of the coordination environment of the centre ion, Ru(II), are compared and discussed in detail on the basis of analyzing their photophysical and photochemical properties. Kinetics experiments for the photodegradation of Rhodamine B (RhB) dye were followed with spectrophotometric analysis showing an absorbance decrease at 544 nm resulting from the cleavage of the aromatic ring of RhB. UV spectroscopy indicated that the degradation proceeds with a pseudo-first-order rate constant in the range of 10?3 to 10?2 s?1. These results demonstrate that the hybrids have effective activity and reusability for the photodegradation of RhB.
机译:两个杂种[Ru(bpy) 2 (CH 3 CN) 2 < / sub> ] 2 [W 10 O 32 ]·2CH 3 CN(RuW-1)和[Ru(bpy) 3 ] 2 [W 10 O 32 ]]](RuW-2)(bpy = 2,2'-联吡啶),是在水热条件下,由(2,2'-联吡啶基)钌配合物与分解钨酸盐反应合成的,其特征在于IR,UV,荧光和瞬态吸收光谱。在分析中心离子Ru( II )的光物理和光化学性质的基础上,对它们的配位环境的影响进行了比较和讨论。罗丹明B(RhB)染料光降解的动力学实验随后进行了分光光度分析,结果表明,由于RhB芳环的裂解,其在544 nm处的吸光度降低。紫外光谱表明降解以伪一级速率常数进行,范围在10 ?3 到10 ?2 s ?1 。这些结果表明,杂种对RhB的光降解具有有效的活性和可重复使用性。

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