Syntheses, electrochemical sensors and desulfurization of three octamolybdate-based hybrids decorated by multiple N-donor ligands

IF 3.2 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Inorganica Chimica Acta Pub Date : 2025-07-17 DOI:10.1016/j.ica.2025.122841

Xia Yu , Zhenyu Shi , Yanhua Yu , Yuguo Zheng , Qingqing Guo , Xiaoyan Li , Jie Zhao , Weiran Long

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引用次数: 0

Abstract

Three new octamolybdates-based hybrid compounds, [Ag₂(H₃X)₂](Mo₈O₂₆)·2H₂O (1), [Cu₂(H₂Y)₂(H₂O)₄](Mo₈O₂₆)·3H₂O (2) and [Ag₄(H₂Y)₄][Mo₈O₂₆] (3) (H₂X = 2,6-dimethyl-3,5-bis(pyrazol-3-yl)pyridine, H₂Y = 3-(1H-pyrazol-4-yl)-5-(pyridine-2-yl)-1,2,4-triazole), were obtained using different multiple N-donor ligands under hydrothermal conditions. Their characteristics were identified by single crystal X-ray diffraction analyses, elemental analyses, thermogravimetric analyses (TG) and infrared spectra analyses (IR). The structure of compound 1 is a three-dimensional (3D) supramolecular network composed of 2D layers [Ag₂(H₃X)₂(Mo₈O₂₆)] and crystal water molecules through hydrogen bonds. In compound 2, (Mo₈O₂₆)⁴⁻ anions function as bidentate bridging ligands to join [Cu₂(H₂Y)₂(H₂O)₄]⁴⁺ units into a 1D chain. Compound 3 is assembled by π‧‧‧π stacking interactions between double chains [Ag₄(H₂Y)₄(Mo₈O₂₆)]_n. Cyclic voltammetry measurements demonstrate that compounds 1–3 can serve as versatile bifunctional electrocatalysts, capable of mediating the reduction of KBrO₃, NaNO₂, and H₂O₂, as well as facilitating the oxidation of ascorbic acid (AA).They also can serve as amperometric sensors for NO₂⁻. Additionally, their photocatalytic properties were evaluated by the degradation of Methylene blue (MB). Compared with the synthetic precursors of compound 2, it exhibits better catalytic oxidation desulfurization (ODS) efficiency towards thioanisole (MBT). As a heterogeneous catalyst, compound 2 displays good cyclic stability. After 4 cycles of use, the MBT conversion rate decreases only from an initial 98.7 % to 94 %.

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多n给体修饰的三种八胺钼酸盐杂化物的合成、电化学传感器及脱硫

用不同的n -给体在水热条件下合成了三种新的八胺酸盐基杂化化合物[Ag2(H3X)2]（Mo8O26）·2H2O (1), [Cu2(H2Y)2(H2O)4]（Mo8O26）·3H2O(2)和[Ag4(H2Y)4][Mo8O26] (3) （H2X = 2,6-二甲基-3,5-双（吡唑-3-基）吡啶，H2Y = 3-（1h -吡唑-4-基）-5-（吡啶-2-基）-1,2,4-三唑）。通过单晶x射线衍射分析、元素分析、热重分析（TG）和红外光谱分析（IR）对其进行了表征。化合物1的结构是由二维层[Ag2(H3X)2(Mo8O26)]和结晶水分子通过氢键组成的三维（3D）超分子网络。在化合物2中，（Mo8O26）4−阴离子作为双齿桥接配体将[Cu2(H2Y)2(H2O)4]4+单元连接成一维链。化合物3是通过双链[Ag4(H2Y)4(Mo8O26)]n之间的π····π堆叠相互作用组装而成。循环伏安测量表明，化合物1-3可以作为多功能双功能电催化剂，能够介导KBrO3、NaNO2和H2O2的还原，并促进抗坏血酸（AA）的氧化。它们也可以作为NO2−的安培传感器。此外，还通过降解亚甲基蓝（MB）评价了它们的光催化性能。与化合物2的合成前驱体相比，它对硫代苯甲醚（MBT）表现出更好的催化氧化脱硫效率。作为非均相催化剂，化合物2具有良好的循环稳定性。4个循环使用后，MBT转化率仅从最初的98.7%下降到94%。

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来源期刊

Inorganica Chimica Acta 化学-无机化学与核化学

CiteScore

6.00

自引率

3.60%

发文量

440

审稿时长

35 days

期刊介绍： Inorganica Chimica Acta is an established international forum for all aspects of advanced Inorganic Chemistry. Original papers of high scientific level and interest are published in the form of Articles and Reviews. Topics covered include: • chemistry of the main group elements and the d- and f-block metals, including the synthesis, characterization and reactivity of coordination, organometallic, biomimetic, supramolecular coordination compounds, including associated computational studies; • synthesis, physico-chemical properties, applications of molecule-based nano-scaled clusters and nanomaterials designed using the principles of coordination chemistry, as well as coordination polymers (CPs), metal-organic frameworks (MOFs), metal-organic polyhedra (MPOs); • reaction mechanisms and physico-chemical investigations computational studies of metalloenzymes and their models; • applications of inorganic compounds, metallodrugs and molecule-based materials. Papers composed primarily of structural reports will typically not be considered for publication.