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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Two cationic metal-organic frameworks based on cadmium and α,ω-alkanedisulfonate anions and their photoluminescent properties
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Two cationic metal-organic frameworks based on cadmium and α,ω-alkanedisulfonate anions and their photoluminescent properties

机译：基于镉和α，ω-链烷二磺酸根阴离子的两个阳离子金属有机骨架及其光致发光性能

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摘要

We have successfully synthesized three cadmium-based metal-organic frameworks by utilizing two separate organic linkers to direct the structure. The first material is a three-dimensional neutral framework based on 2D cadmium ethanedisulfonate layers pillared by a 4,4′-bipyridine linker. The other two materials are 3D cationic frameworks and are the first with propanedisulfonate and butanedisulfonate as extraframework charge balancing anions. Both structures occupy a high symmetry hexagonal crystal system where Cd-bipy chains are arranged into three crystallographically distinct layers that stack spirally along [001]. The framework is stabilized by alkanesulfonate anions that are electrostatically and hydrogen bonded to the framework. Each material was characterized by single-crystal and powder X-ray diffraction. The thermal and luminescent properties were also investigated by thermogravimetric analysis and photoluminescence spectroscopy, respectively. All three materials exhibit high thermal stability to above 300 °C and efficient blue emissive photoluminescence centered at 425 nm to 450 nm upon 350 nm excitation.
机译：我们已经成功利用两个独立的有机连接基来指导结构，成功合成了三个基于镉的金属有机框架。第一种材料是基于由4,4'-联吡啶连接基柱撑的2D乙烷二磺酸镉层的三维中性骨架。其他两种材料是3D阳离子骨架，并且是第一种以丙二磺酸盐和丁二磺酸盐为骨架外电荷平衡阴离子的材料。这两个结构都占据了高对称六方晶体系统，其中Cd-bipy链排列成三个晶体学上不同的层，这些层沿[001]呈螺旋状堆积。骨架通过静电和氢键结合到骨架的链烷磺酸根阴离子来稳定。每种材料的特征在于单晶和粉末X射线衍射。还分别通过热重分析和光致发光光谱研究了热和发光性质。所有这三种材料在超过300°C的温度下都具有很高的热稳定性，并且在350 nm激发下在425 nm至450 nm处具有有效的蓝色发射光致发光。

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