CAU-1 and CAU-2: New tubular alkali metal–organic framework materials, A3[C6H3(CO2)(CO2H0.5)(CO2H)]2 (A = K or Rb)

Two new tubular alkali metal–organic framework materials, A3[C6H3(CO2)(CO2H0.5)(CO2H)]2 (A = K or Rb) have been synthesized through solvothermal reactions using NH4F, 1,3,5-C6H3(CO2H)3, ANO3, and N,N-Dimethylformamide at 180 °C. Single-crystal X-ray diffraction was used to determine the structures of the reported materials. A3[C6H3(CO2)(CO2H0.5)(CO2H)]2 have novel tubular structures consisting of channels of AO6 and AO8 alkali metal oxide groups as well as the benzenetricarboxylate organic linker. Detailed structural analyses with full characterization including infrared spectra, thermogravimetric analyses, and elemental analyses are reported.