Oriented design and synthesis of water-stable heterometallic metal–organic frameworks by bridging ligands containing hydrophobic (–CH3) substituents

• Two new 3D microporous metal–organic frameworks were synthesized under solvothermal condition.
• The two compounds have shown stabilities to the water and the common organic solvents.
• The two compounds display high adsorption of CO2 without any functional sites.

Two new 3D metal–organic frameworks (MOFs), [NH2(CH3)2][KZn(DMTDC)2] (1) and [NH2(CH3)2][NaZn(DMTDC)2] (2), have been solvothermally synthesized and structurally characterized. Both 1 and 2 exhibit 3D structures with 1D infinite helical K–O–Zn and Na–O–Zn metallic chains. Meanwhile, stability studies indicate that 1 was robust even after immersed in various solvents and heated in the air. Furthermore, the N2 and CO2 adsorption isotherms of 1 and 2 were also measured.

Two 3D frameworks with 1D infinite helical K–O–Zn (1) and Na–O–Zn (2) chains have been synthesized, and both of them exhibit high stabilities after exposed to water, different solvents and even heated in the air.Figure optionsDownload as PowerPoint slide