Heteronuclear coordination polymers with imidazole ligand: Synthesis, characterization and alcohol oxidation activities

IF 2.4 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Polyhedron Pub Date : 2024-10-22 DOI:10.1016/j.poly.2024.117263

Güneş Süheyla Kürkçüoğlu , Okan Zafer Yeşilel , Telvin Mwanza , Seray Kekeç , Hakan Ünver , Onur Şahin

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Abstract

Two new heteronuclear Cd(II)/Pd(II) coordination polymers, [Cd₂(µ-im)₂(Him)₄Pd(µ-CN)₄]_n (1) and [Cd(Him)₂Pd(µ-CN)₄]_n (2) (Him: imidazole), have been synthesized under different conditions and characterized using elemental analysis, thermal analysis, FT-IR and Raman spectroscopy, single-crystal and powder X-ray diffraction techniques. In 1, the Cd(II) ions are bridged by imidazolate ligands to generate 1D chain structure. Neighbouring 1D chains were linked by [Pd(CN)₄]^2- ions to form 3D framework. In 2, the metal ions are bridged by cyanide ligands to generate 2D [Cd₂Pd₂(µ-CN)₄]_n network. Catalytic peroxidative oxidation activity of 1 and 2 was examined on the oxidation of benzyl alcohol using tertiary-butyl hydroperoxide (t-BuOOH) as the oxygen source. The compound 1 exhibited over 90 % product conversion at 80 °C in 24-hour reaction time. In addition, the catalyst exhibited high selectivity towards benzaldehyde and no over-oxidation product (benzoic acid) was detected.

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含咪唑配体的异核配位聚合物：合成、表征和酒精氧化活性

在不同条件下合成了两种新的异核镉(II)/钯(II)配位聚合物：[Cd2(µ-im)2(Him)4Pd(µ-CN)4]n (1) 和 [Cd(Him)2Pd(µ-CN)4]n (2)（Him：咪唑），并利用元素分析、热分析、傅立叶变换红外光谱和拉曼光谱、单晶和粉末 X 射线衍射技术对其进行了表征。在 1 中，镉（II）离子通过咪唑配体桥接，生成一维链结构。相邻的一维链由 [Pd(CN)4]2- 离子连接，形成三维框架。在 2 中，金属离子通过氰配体桥接，生成二维 [Cd2Pd2(µ-CN)4]n 网络。以叔丁基过氧化氢（t-BuOOH）为氧源，考察了 1 和 2 在苯甲醇氧化过程中的催化过氧化活性。化合物 1 在 80 °C、24 小时反应时间内的产物转化率超过 90%。此外，该催化剂对苯甲醛具有高选择性，且未检测到过氧化产物（苯甲酸）。

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来源期刊

Polyhedron 化学-晶体学

CiteScore

4.90

自引率

7.70%

发文量

515

审稿时长

2 months

期刊介绍： Polyhedron publishes original, fundamental, experimental and theoretical work of the highest quality in all the major areas of inorganic chemistry. This includes synthetic chemistry, coordination chemistry, organometallic chemistry, bioinorganic chemistry, and solid-state and materials chemistry. Papers should be significant pieces of work, and all new compounds must be appropriately characterized. The inclusion of single-crystal X-ray structural data is strongly encouraged, but papers reporting only the X-ray structure determination of a single compound will usually not be considered. Papers on solid-state or materials chemistry will be expected to have a significant molecular chemistry component (such as the synthesis and characterization of the molecular precursors and/or a systematic study of the use of different precursors or reaction conditions) or demonstrate a cutting-edge application (for example inorganic materials for energy applications). Papers dealing only with stability constants are not considered.