A series
of four new metal–organic frameworks, [Na2(SBA)]
(1 or CYCU-6), [K8(H2O)2(SBA)4(DMF)] (2), [Rb2(SBA)] (3), and [Cs(H2O)(HSBA)]·DMF
(4), have been constructed under solvothermal conditions
by using 4,4′-sulfonyldibenzoic acid (H2SBA) as
ligand. The structure of the complexes has been determined by single-crystal
X-ray diffraction analysis and further characterized by elemental
analyses, reflectance UV–vis, and IR spectra, powder X-ray
diffraction (PXRD), and thermogravimetric analysis (TGA). The single
crystal X-ray structural studies showed that all the complexes display
three-dimensional (3D) structures containing inorganic motifs with
one-dimensional chains connected through organic linkers and forming
3D networks. Among the four complexes, the Na(I) complex (1) displays very high thermal stability, which was inferred from TGA
and PXRD results. Moreover, the solid state luminescent properties
of the new complexes have been investigated at room temperature. In
addition, the gas sorption properties of 1 toward nitrogen,
hydrogen, carbon dioxide, and methane are reported.