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Charge-Separated and Lewis Paired Metal-Organic Framework for Anion Exchange and CO2 Chemical Fixation.
Chemistry - A European Journal ( IF 4.3 ) Pub Date : 2020-07-03 , DOI: 10.1002/chem.202002823 Sheela Thapa 1 , Lingyao Meng 1 , Eshani Hettiarachchi 2 , Yousef K Bader 1 , Diane A Dickie 3 , Gayan Rubasinghege 2 , Sergei A Ivanov 4 , Erika C Vreeland 5 , Yang Qin 1
Chemistry - A European Journal ( IF 4.3 ) Pub Date : 2020-07-03 , DOI: 10.1002/chem.202002823 Sheela Thapa 1 , Lingyao Meng 1 , Eshani Hettiarachchi 2 , Yousef K Bader 1 , Diane A Dickie 3 , Gayan Rubasinghege 2 , Sergei A Ivanov 4 , Erika C Vreeland 5 , Yang Qin 1
Affiliation
Charge‐separated metal–organic frameworks (MOFs) are a unique class of MOFs that can possess added properties originating from the exposed ionic species. A new charge‐separated MOF, namely, UNM‐6 synthesized from a tetrahedral borate ligand and Co2+ cation is reported herein. UNM‐6 crystalizes into the highly symmetric P43n space group with fourfold interpenetration, despite the stoichiometric imbalance between the B and Co atoms, which also leads to loosely bound NO3− anions within the crystal structure. These NO3− ions can be quantitatively exchanged with various other anions, leading to Lewis acid (Co2+) and Lewis base (anions) pairs within the pores and potentially cooperative catalytic activities. For example, UNM‐6‐Br, the MOF after anion exchange with Br− anions, displays high catalytic activity and stability in reactions of CO2 chemical fixation into cyclic carbonates.
中文翻译:
用于阴离子交换和CO2化学固定的电荷分离和路易斯配对金属有机骨架。
电荷分离的金属有机骨架(MOF)是一类独特的MOF,可以具有源自暴露离子物种的附加特性。本文报道了一种新的电荷分离MOF,即由四面体硼酸盐配体和Co 2+阳离子合成的UNM-6 。UNM-6 crystalizes到高度对称P 43 Ñ与四倍穿插空间群,尽管B和Co原子之间的化学计量不平衡这也导致松散结合的NO 3 -的晶体结构内的阴离子。这些NO 3 -离子可定量与各种其它阴离子交换,从而导致路易斯酸(共2+)和路易斯碱(阴离子)对在孔隙内和潜在的协同催化活性。例如,UNM -6-溴,溴与阴离子交换后的MOF -阴离子,显示高的催化活性和稳定性中的CO反应2化学固定到环状碳酸酯。
更新日期:2020-07-03
中文翻译:
用于阴离子交换和CO2化学固定的电荷分离和路易斯配对金属有机骨架。
电荷分离的金属有机骨架(MOF)是一类独特的MOF,可以具有源自暴露离子物种的附加特性。本文报道了一种新的电荷分离MOF,即由四面体硼酸盐配体和Co 2+阳离子合成的UNM-6 。UNM-6 crystalizes到高度对称P 43 Ñ与四倍穿插空间群,尽管B和Co原子之间的化学计量不平衡这也导致松散结合的NO 3 -的晶体结构内的阴离子。这些NO 3 -离子可定量与各种其它阴离子交换,从而导致路易斯酸(共2+)和路易斯碱(阴离子)对在孔隙内和潜在的协同催化活性。例如,UNM -6-溴,溴与阴离子交换后的MOF -阴离子,显示高的催化活性和稳定性中的CO反应2化学固定到环状碳酸酯。