具有高稳定性和气体吸附能力的新型（3,4,6）连接的金属有机骨架。

Novel (3,4,6)-connected metal-organic framework with high stability and gas-uptake capability.

机构信息

Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China.

出版信息

Inorg Chem. 2012 Aug 6;51(15):8402-8. doi: 10.1021/ic300950h. Epub 2012 Jul 17.

DOI:10.1021/ic300950h

PMID:22804350

Abstract

A microporous and noninterpenetrated metal-organic framework [Cu(3)(L)(2)(DABCO)(H(2)O)]·15H(2)O·9DMF (1) has been synthesized using two different ligands, [1,1':3',1″-terphenyl]-4,4″,5'-tricarboxylic acid (H(3)L) and 1,4-diazabicyclo[2.2.2]octane (DABCO). As revealed by variable-temperature powder X-ray diffraction (VT-PXRD) measurements, N,N'-ditopic DABCO plays an important role for stabilization of the Cu-L framework. The three-dimensional framework of 1 exhibits high stability and excellent adsorption capacity for H(2) (54.3 mg g(-1) at 77 K and 20 bar), CO(2) (871 mg g(-1) at 298 K and 20 bar), CH(4) (116.7 mg g(-1), 99 cm(3) (STP) cm(-3) at 298 K and 20 bar), and n-pentane (686 mg g(-1) at 298 K and 1 bar). Interestingly, the excellent selectivity toward CO(2) over N(2) at ambient temperature (273 and 298 K) and 1 bar makes complex 1 possess practical application in gas separation and purification.

摘要

一种微孔且不互贯的金属有机骨架[Cu(3)(L)(2)(DABCO)(H(2)O)]·15H(2)O·9DMF（1），是使用两种不同的配体，[1,1':3',1″-三联苯]-4,4″,5'-三羧酸（H(3)L）和 1,4-二氮杂二环[2.2.2]辛烷（DABCO）合成的。正如变温粉末 X 射线衍射（VT-PXRD）测量所揭示的那样，N,N'-双位 DABCO 对于 Cu-L 骨架的稳定起着重要作用。1 的三维骨架具有很高的稳定性和对 H(2)（77 K 和 20 巴时为 54.3 mg g(-1)）、CO(2)（298 K 和 20 巴时为 871 mg g(-1)）、CH(4)（298 K 和 20 巴时为 116.7 mg g(-1)，99 cm(3)（STP）cm(-3)）和正戊烷（298 K 和 1 巴时为 686 mg g(-1)）的优异吸附能力。有趣的是，在环境温度（273 和 298 K）和 1 巴下，1 对 CO(2)相对于 N(2)具有优异的选择性，使其在气体分离和净化方面具有实际应用。