Deciphering the guest-free crystal structures and thermal breathing of the flexible metal-organic frameworks ZIF-7 and ZIF-9

Key Points

• This paper aims to investigate the unique crystal structures and thermal breathing behavior of flexible metal-organic frameworks ZIF-7 and ZIF-9.
• Analysis of guest-free crystal structures
• Examination of thermal breathing phenomena
• Characterization of gas sorption properties of ZIF-7 and ZIF-9
• ZIF-7 and ZIF-9 exhibit significant dynamic phase behavior
• Unique gas sorption profiles indicate potential for varied applications in gas technologies
• Thermal breathing behavior affects structural responsiveness under temperature variations