Employing an Unsaturated Th4+ Site in a Porous Thorium–Organic Framework for Kr/Xe Uptake and Separation,Angewandte Chemie International Edition

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Employing an Unsaturated Th4+ Site in a Porous Thorium–Organic Framework for Kr/Xe Uptake and Separation
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2018-04-20 , DOI: 10.1002/anie.201802173
Yanlong Wang ₁ , Wei Liu ₁ , Zhuanling Bai ₁ , Tao Zheng ₁ , Mark A. Silver ₁ , Yuxiang Li ₁ , Yaxing Wang ₁ , Xia Wang ₁ , Juan Diwu ₁ , Zhifang Chai ₁ , Shuao Wang ₁

Affiliation

Actinide based metal–organic frameworks (MOFs) are unique not only because compared to the transition‐metal and lanthanide systems they are substantially less explored, but also owing to the uniqueness of actinide ions in bonding and coordination. Now a 3D thorium–organic framework (SCU‐11) contains a series of cages with an effective size of ca. 21×24 Å. Th⁴⁺ in SCU‐11 is 10‐coordinate with a bicapped square prism coordination geometry, which has never been documented for any metal cation complexes. The bicapped position is occupied by two coordinated water molecules that can be removed to afford a very unique open Th⁴⁺ site, confirmed by X‐ray diffraction, color change, thermogravimetry, and spectroscopy. The degassed phase (SCU‐11‐A) exhibits a Brunauer–Emmett–Teller surface area of 1272 m² g⁻¹, one of the highest values among reported actinide materials, enabling it to sufficiently retain water vapor, Kr, and Xe with uptake capacities of 234 cm³ g⁻¹, 0.77 mmol g⁻¹, 3.17 mmol g⁻¹, respectively, and a Xe/Kr selectivity of 5.7.

中文翻译：

在多孔Thor-有机骨架中采用不饱和的Th4 +位点进行Kr / Xe的吸收和分离

基于系元素的金属有机骨架（MOF）的独特性，不仅是因为与过渡金属和镧系元素相比，它们的探索性少得多，而且还由于of系离子在键合和配位方面的独特性。现在，一个3D-有机框架（SCU-11）包含一系列有效尺寸大约为10毫米的笼子。21×24Å。在SCU-11中， Th ⁴⁺为10坐标，具有二阶方形棱镜配位几何，从未有任何金属阳离子配合物被记录。双峰位被两个配位的水分子占据，该分子可被除去以提供一个非常独特的开放Th ⁴⁺位点，这一点已通过X射线衍射，变色，热重分析和光谱学证实。脱气阶段（SCU-11-A）的Brunauer-Emmett-Teller表面积为1272 m ² g ^-1，是所报道的act系元素材料中最高的值之一，使它能够以234的吸收能力充分保留水蒸气，Kr和Xe。厘米³ 克^-1，0.77毫摩尔克^-1，3.17毫摩尔克^-1，分别和5.7氙/氪选择性。

更新日期：2018-04-20

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