| 以二羧基苯氧乙酸为配体的一维钆(Ⅲ)配位聚合物的合成及晶体结构 |
| Synthesis and Crystal Structure of 1D Gadolinium(Ⅲ) Coordination Polymer Based on 5-Oxyacetate Isophthalic Acid |
|
| 摘要: 利用Williamson合成法合成了3，5-二甲氧酰基苯氧乙酸甲酯(ML)，并以之作为配位前驱物与氯化钆在水热条件下发生原位水解-配合反应，得到了3，5-二羧基苯氧乙酸(H3L)与Gd(Ⅲ)形成的一维配位聚合物[H3L2Gd(H2O)4]n，用X-射线单晶衍射法对其进行了结构表征。测定结果表明，该配合物结晶于单斜晶系，C2/c空间群，晶胞参数：a=1.534 4(3) nm，b=2.074 9(3) nm，c=0.716 08(16) nm，β=103.49°，V=2.216 90(225) nm3，Z=4，Dc=2.117 01 g·cm-3。Gd(III)金属中心处于扭曲的双帽三棱柱配位几何构型的中心，与来自4个配体的4个羧基氧原子结合，4个配位水分子则占据了配位环境中剩余的4个顶点。Gd(Ⅲ)金属中心由二齿的配体以Gd-O键连接成Ln2L4型结构单元，并进一步通过共用Gd(Ⅲ)金属中心的方式连接形成一维长链结构。 |
| 关键词: 3，5-二羧基苯氧乙酸 Gd(Ⅲ)配位聚合物 晶体结构 热稳定性 |
| 基金项目: |
| Abstract: A one-dimensional lanthanide-based coordination polymer, [H3L2Gd(H2O)4]n(L=5-oxyacetateisophthalate), was obtained by hydrothermal reaction of GdCl3 and dimethyl 5-(2-methoxy-2-oxoethoxy)isophthalate (ML) which was obtained from Williamson reaction. The polymer′s structure was confirmed by X-ray diffraction method. The polymer crystallizes in the monoclinic space group C2/c, with a=1.534 4(3) nm, b=2.074 9(3) nm, c=0.716 08(16) nm, β=103.49°, V=2.216 90(225) nm3, Z=4,Dc=2.117 01 g·cm-3. The centric Gd(Ⅲ) ion was situated in the center of double-headed triangular prism and coordinated with four O atoms from four different ligands and four coordinated water molecules. The Ln2L4 construction units which was made up of Gd(Ⅲ) ion and bidentate ligand were connected by sharing the centric Gd(Ⅲ) ions through Gd-O bonds into 1D chains. CCDC: 801256. |
| Keywords: 5-oxyacetate isophthalic acid gadolinium(Ⅲ) coordination polymer crystal structure thermal stability |
| |
| 摘要点击次数: 1917 |
| 全文下载次数: 2040 |
| 王忠卫,钟旭世,王 鹏,赵静静,李 莹.以二羧基苯氧乙酸为配体的一维钆(Ⅲ)配位聚合物的合成及晶体结构[J].无机化学学报,2011,27(8):1581-1585. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
