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A novel coordination polymer of [Sr2(4-CPOA)2(H2O)5]n (where 4-CPOA2- is 4-carboxylphenoxyacetate) has been synthesized and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. The title complex belongs to monoclinic system with space group C2/c, a=2.563 9(5) nm, b=1.162 7(2) nm, c=0.742 96(15) nm, β=99.64(3)°. V=2.183 5(7) nm3, Z=4, Mr=653.60, Dc=1.988 g·cm-3, R=0.027 8, wR=0.058 1. The strontium atom has a bicapped triangular prismatic coordination geometry, involving four oxoacetate oxygen atoms, one ether oxygen atom from different 4-CPOA2- ligands and three water molecules. The strontium(Ⅱ) ions are linked by 4-CPOA2- ligands and water molecules to form a 3D network structure. CCDC: 223313. 相似文献
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1 INTRODUCTION Supramolecular chemistry of manganese(II) car- boxylate coordination polymers has been inten- sively studied in recent years, within which ligand design is an important aspect in adjusting the coordi- nation framework and functionalities of the complexes formed[1~4]. Carboxyphenoxyacetic acids (CPOAH2), which have been known to show biological activities and are widely used in agriculture, are a family of multidentate flexible ligands with versatile binding abilities. … 相似文献
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0IntroductionThe solid-state chemistry of manganese!car-boxylate coordination polymers has received growingattention over the past few years,owing to their fasci-nating network topologies and potential application inthe field of molecular magnetism and bi… 相似文献
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将CeO2溶胶与Pt/C催化剂机械混合制备了Pt-CeO2/C催化剂,研究了酸性条件下Pt-CeO2/C催化剂对甲醇氧化的电催化活性。结果表明,与Pt/C催化剂相比,Pt-CeO2/C催化剂对甲醇展现出更好的催化活性。XRD和TEM测试结果表明,Pt-CeO2/C催化剂中Pt与CeO2的平均粒径均为3~4 nm。对CeO2含量不同的Pt-CeO2/C催化剂在CH3OH-H2SO4中进行循环伏安测试发现,Pt-CeO2/C催化剂对甲醇氧化的电催化活性较高,其中Pt与CeO2质量比为1∶1时,催化剂的催化活性最高,对甲醇氧化的峰电流密度达到0.112 A/cm2。 相似文献
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A novel coordination polymer of [Ca(2-OPA)2(H2O)2]n (2-OPA-=2-oxo-1(4H)-pyridineacetate anion) was synthesized and characterized by elemental analysis, IR, TG and single crystal X-ray diffraction. The title complex crystallizes in orthorhombic with space group Pna21, a=0.799 96(16) nm, b=0.823 77(16) nm, c=2.415 3(5) nm, V=1.591 6(6) nm3, Z=4, R=0.030 3, wR=0.070 0. The Ca atom is eight-coordinated by six O atoms of four 2-OPA- ligands and two water molecules, and displays a dodecahedron coordination geometry. Each 2-OPA- ligand bridges two adjacent Ca atoms, forming a infinite chain along the a direction. The Ca…Ca distance is 0.4102 2(8)nm. A two-dimensional supramolecular framework is further constructed by the hydrogen bonds and the weak π-π interactions. The results of TG analysis show the chain structure of the title complex was stable under 297.5 ℃. CCDC: 251669. 相似文献
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