用含氮杂环吡嗪,哒嗪和嘧啶取代有机连接基5,5'-(苯-1,4-二基)二间苯二甲酸酯中的苯间隔基,得到三个有机连接基,它们与铜离子反应在溶剂热条件下形成三个同构的金属有机骨架(ZJNU-46,ZJNU-47和ZJNU-48),由于同时固定了骨架中的开放金属位点和路易斯碱性氮位点,因此对乙炔具有极高的吸附能力。在1 atm和295 K时,重量C 2 H 2的吸收量达到187、213和193 cm 3(STP)g -1对于这三种化合物。ZJNU-47a的重量C 2 H 2吸附量是MOF材料中第二高的吸附量。值得注意的是,尽管它们具有相同的孔隙度,开孔金属位点和未配位的氮位点的密度,但对这三种化合物观察到的C 2 H 2吸附能力却截然不同,我们认为这主要与氮原子的相对位置差异有关。对骨架对C 2 H 2客体分子的不同结合亲和力,从而对C 2 H 2吸附。这项工作表明,开放氮位的合理排列将有利地改善C
A POROUS METAL-ORGANIC FRAMEWORK WITH PYRIMIDINE GROUPS FOR METHANE STORAGE EXHIBITING HIGH WORKING CAPACITY
申请人:The Board of Regents of the University of Texas System
公开号:US20170173559A1
公开(公告)日:2017-06-22
Disclosed herein are metal-organic frameworks (MOF) and uses thereof, including those comprising a repeat unit of the formula [Cu
2
L(H
2
O)
2
]-5DMF-3H
2
O, wherein L is a ligand of the formula: These are useful for many applications, including in the purification of hydrogen gas from production byproducts CH
4
and CO
2
, sensing, heterogeneous catalysis, drug delivery, lithium sulfide battery, membrane and analytical devices.
Computational Identification and Experimental Demonstration of High‐Performance Methane Sorbents
作者:Karabi Nath、Alauddin Ahmed、Donald J. Siegel、Adam J. Matzger
DOI:10.1002/anie.202203575
日期:2022.6.20
Promising MOFs were identified computationally and experimentally demonstrate remarkable methane uptake that outperforms known benchmarks both volumetrically and gravimetrically. An advanced set of interatomic potentials that explicitly account for the presence of coordinatively unsaturated sites (CUS) in MOFs were used to identify the high-capacity MOFs that were previously overlooked due to the limitation