Coordination polymers are a class of macromolecular compounds containing repeating metallic units or clusters coordinated by bridging ligands. When the formed structures are extended to 2D or 3D ones through coordination and/or hydrogen bonds, these are known as metal-organic frameworks (MOFs). Interesting physical and chemical properties of MOFs make them promising candidates in applications of drug storage and delivery, sensors, luminescent materials, gas storage, gas separation, catalysis, etc. [1-3]. Coordination polymers based on flexible ligands usually exhibit unexpected architectures and properties due to the variable conformations of these ligands. A new coordination polymer has been prepared on the basis of a dicarboxylic acid with flexible spacer (1,3-bis(3-carboxypropyl)tetramethyldisiloxane) and Zn(ClO4)2 in presence of 4,4’-azopyridine as co-ligand (Scheme 1). The structure of the resulted compound was elucidated by elemental and spectral analysis as well as by single crystalal X-ray diffraction proving to be a 2D metal-organic framework based on dizinc coordination units bridged through both flexible and rigid ligands (Figure 1) [4]. The thermal analysis and study of water vapor and gas (H2, N2) sorption behaviors revealed that the compound has a good thermal stability, it is in essence hydrophobic, but shows low values for the gas sorption capacity at low pressure.