Synthesis, X-ray crystal structure, thermal and BET analysis of a new centrosymmetric metal-organic framework

A new coordination polymer based on pyrazine-2,3-dicarboxylic acid (pzdcH2) formulated as {[Mn(pzdc)(H2O)].2H2O}n, 1, was obtained by treatment of MnCl2.6H2O with H2pzdc, 8-hydroxy quinoline (8-HQ) and 2-amino-4-methyl pyridine(ampy). In this research paper, we describe the synthesis, elemental analysis, IR spectroscopy, TGA, BET analyses, and single X-ray diffraction method. The chemical environment of around each Mn(II) is as a distorted octahedral by participating one N, five O atoms from three (pzdc)2- and two water molecules as O5MnN. The centrosymmetric ladder-like structure of 1 bears homorganic bridge from oxygen atoms of (pzdc)2- ligand. Indeed, Mn-pzdc-Mn part play rungs role for our ladder structure. BET analysis shows that the title coordination polymer contains cavities in the size of 18 ?. TGA analysis verified that the title coordination polymer is quite thermal stabilities

Keywords:

metal-organic framework , pyrazine-2 , 3-dicarboxylic acid , crystal structure , coordination polymer , water cluster , TGA , BET