| 一系列萘羧酸膦酸镧系配合物的合成、结构和荧光性质 |
| Synthesis, structures, and luminescent properties of a series of lanthanide carboxylate-phosphonates |
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| 摘要: 在溶剂热条件下，5-羧酸-1-萘膦酸(5-pncH3)和稀土硝酸盐反应合成得到3例萘羧酸膦酸镧系配合物：[Pr (5-pnc)(H2O)]·2H2O (1)、[Sm (5-pnc)(H2O)]·H2O (2)和[Eu (5-pnc)(H2O)]·H2O (3)。采用单晶X射线衍射、粉末X射线衍射、元素分析、红外光谱、热重分析和荧光光谱对配合物进行了表征。晶体结构表明，每个七配位的镧系离子由来自5个膦酸盐配体的6个O原子和来自1个配位水分子的一个O原子配位。[LnO7]通过O—C—O、O—P—O或—O—单元连接成一维双金属链结构，一维双金属链再进一步由萘羧酸膦酸配体(5-pnc3-)连接成三维开放骨架结构。荧光性质研究表明，配合物3在330 nm的激发光下，发射Eu的红色特征荧光，而配合物1和2在蓝光区显示出非常宽的配体中心发射带。 |
| 关键词: 配合物 羧酸膦酸 晶体结构 荧光性质 |
| 基金项目: 江苏省青蓝工程、宿迁学院科研平台(No.2021pt04)、宿迁学院西楚高层次人才和宿迁市重点实验室基金(No.M202109)资助。 |
| Abstract: Three lanthanide carboxylate-phosphonates based on lanthanide nitrate hexahydrate and (5-carboxynaph- thalen-1-yl)phosphonic acid (5-pncH3) formulated as [Pr(5-pnc)(H2O)]·2H2O (1), [Sm(5-pnc)(H2O)]·H2O (2), and [Eu(5-pnc)(H2O)]·H2O (3) has been obtained as single phases under solvothermal conditions. Complexes 1-3 were characterized by single-crystal X-ray diffraction, powder X-ray diffraction, elemental analysis, IR spectra, thermo- gravimetric analysis, and fluorescence spectra. Crystal structures reveal that each lanthanide ion is seven-coordinated by six O atoms from five phosphonate ligands and one O atom from one water molecule. The building blocks [LnO7] of complexes 1-3 are linked into a 1D double metal chain structure by the O—C—O, O—P—O, or —O— units. The 1D double metal chain is fused into a 3D open-framework structure by 5-pnc3-. Complex 3 exhibited very strong characteristic emission bands for the Eu (Ⅲ) ion in the visible region under 330 nm excitation. Complexes 1 and 2 displayed very broad ligand - centered emission bands in the blue light region. |
| Keywords: complex carboxylate-phosphonate crystal structure luminescent property |
| 投稿时间：2023-05-13 修订日期：2023-06-16 |
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| 徐艳,李素芝,李新星.一系列萘羧酸膦酸镧系配合物的合成、结构和荧光性质[J].无机化学学报,2023,39(10):1950-1958. |
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