A multifunctional double walled zirconium metal–organic framework: high performance for CO2 adsorption and separation and detecting explosives in the aqueous phase†
Abstract
A rare double walled zirconium metal–organic framework, [Zr6O4(OH)4(DCPB)6]·2DMF·1H2O (JLU-Liu45, 1,3-di(4-carboxyphenyl)benzene (H2DCPB)), was successfully constructed. Because of its high connectivity, double wall and interpenetration of the framework, JLU-Liu45 displays extraordinary chemical stability, and is able to maintain an intact framework after being immersed in acid or base solutions. Such a Zr-MOF is also a multifunctional material, which exhibits good capabilities for both CO2 adsorption and separation and explosives detection in the aqueous phase. Due to the multiple weak C–H⋯O interactions and narrow pores of the framework, JLU-Liu45 displays brilliant CO2 adsorption (116 cm3 g−1, 1 bar and 273 K) and separation ability (CO2/N2 = 81.4, 1 bar and 298 K), surpassing that of state-of-the-art Zr-MOFs reported to date. Additionally, JLU-Liu45 shows high performance in detecting explosives in the aqueous phase, in which the KSV value towards TNP can reach up to the 105 M−1 level.