Porous Salts as Platforms for Heterogeneous Catalysis,Small

当前位置： X-MOL 学术 › Small › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Porous Salts as Platforms for Heterogeneous Catalysis
Small ( IF 13.0 ) Pub Date : 2023-04-13 , DOI: 10.1002/smll.202207507
Kyle J Korman _{1,

2} , Michael R Dworzak ₁ , Glenn P A Yap ₁ , Eric D Bloch _{1,

2}

Affiliation

The preparation of a new class of reactive porous solids, prepared via straightforward salt metathesis reactions, is described here. Reaction of the dimethylammonium salt of a magnesium-based porous coordination cage with the chloride salt of [Cr^IICl(Me₄cyclam)]⁺ affords a porous solid with concomitant removal of dimethylammonium chloride. The salt consists of the ions combined in the expected ratio based on their charge as confirmed by UV–vis and X-ray photoelectron spectroscopies, ion chromatography (IC), and inductively coupled plasma mass spectrometry (ICP-MS). The porous salt boasts a Brunauer-Emmett-Teller (BET) surface area of 213 m² g⁻¹. Single crystal X-ray diffraction reveals the chromium(II) cations in the structure reside in the interstitial space between porous cages. Importantly, the chromium(II) centers, previously shown to react with O₂ to afford reactive chromium(III)-superoxide adducts, are still accessible in the solid state as confirmed by UV–vis spectroscopy. The site-isolated reactive centers have competence toward hydrogen atom abstraction chemistry and display significantly increased stability and reactivity as compared to dissolved ions.

中文翻译：

多孔盐作为多相催化平台

本文描述了通过简单的盐复分解反应制备的新型反应性多孔固体的制备。镁基多孔配位笼的二甲基铵盐与[Cr ^II Cl(Me ₄ cyclam)] ⁺的氯化物盐的反应提供多孔固体，同时除去二甲基氯化铵。该盐由基于其电荷的预期比例组合的离子组成，经紫外可见分光光度计和 X 射线光电子能谱、离子色谱 (IC) 和电感耦合等离子体质谱 (ICP-MS) 证实。该多孔盐的Brunauer-Emmett-Teller (BET)表面积为213 m ² g ^-1。单晶X射线衍射表明结构中的铬(II)阳离子存在于多孔笼之间的间隙空间中。重要的是，铬（II）中心（之前显示与O ₂反应产生反应性铬（III）-超氧化物加合物）在固态下仍然可以通过紫外-可见光谱证实。位点隔离的反应中心具有夺取氢原子化学的能力，并且与溶解的离子相比，稳定性和反应性显着提高。

更新日期：2023-04-13

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南