Gas sorption properties of a new <scp>Zn‐BTB</scp> metal–organic framework with permanent porosity
In‐Hwan Choi, Ja‐Min Gu, Hyunchul Kim, Youngmee Kim, Seong Huh
Abstract
Abstract A new three‐dimensional (3D) Zn‐based metal–organic framework (Zn‐MOF) with 1,3,5‐benzenetribenzoate (BTB 3− ), [Zn 4 O(BTB) 2 (0.5H 2 O) 4 ]·H 2 O·8DEF ( 1 ), has been prepared using the reaction between Zn(NO 3 ) 2 ·6H 2 O and a tritopic bridging ligand 1,3,5‐benzenetribenzoic acid (H 3 BTB) in the presence of a potentially ditopic bridging ligand 3,3′‐terphenyldicarboxylic acid (H 2 TPDC). Interestingly, TPDC 2− ligand did not incorporate into the resulting Zn‐MOF, and the title compound was not formed in the absence of TPDC 2− ligand during the synthesis. After the solvate molecules were removed, Zn‐MOF 1 exhibited a doubly interpenetrated 3D ant net with a large solvent accessible void. The powder x‐ray diffraction pattern of the evacuated 1 did not change significantly compared to that of the as‐prepared 1 , thus indicating that 1 has permanent porosity. Gas sorption analyses were performed to investigate the sorption abilities of the evacuated 1 by using several different gases at suitable temperatures: N 2 , CO 2 , H 2 , and CH 4 .