The creation of new porous inorganic-organic hybrid materials having potential gas adsorption properties is of major importance in materials chemistry. Four new metal organic frameworks built from lanthanide metal ions (Y, La, Eu, and Gd ) linked with organic dicarboxylate ligands (2, 5-thiophenedicarboxylate) have been synthesized using either solvothermal or reflux methods. The compounds were structurally characterized by single crystal and powder X-ray diffraction. They crystallize either in orthorhombic or monoclinic symmetry and have either 2D or 3D hydrogen-bonded frameworks. Thermal stability of these compounds was investigated by a combination of thermogravimetric analysis, PXRD and IR. The compounds lose all their guest solvent molecules between 300-400^oC and their frameworks are maintained up to 400^oC.