Synthesis, Crystal Structures, and Magnetic Properties of MnII, CoII, and ZnII Coordination Polymers Containing 1,2,4,5-Benzenetetracarboxylic Acid and 4,4′-Azobispyridine

✍ Scribed by Li-Min Zhao; Huan-Huan Li; Ying Wu; Shi-Yuan Zhang; Zhen-Jie Zhang; Wei Shi; Peng Cheng; Dai-Zheng Liao; Shi-Ping Yan

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 867 KB
• Volume: 2010
• Category: Article
• ISSN: 1434-1948
• DOI: 10.1002/ejic.200901254

✦ Synopsis

Abstract

Manganese(II), cobalt(II), and zinc(II) coordination polymers, {[Mn(H~2~btec)(azopy)(H~2~O)~2~]·(azopy)}~n~ (1), {[Co(H~2~btec)(azopy)(H~2~O)~2~]·(azopy)}~n~ (2), and {[Zn~2.5~(btec)(azopy)(μ~3~‐OH)(H~2~O)]·H~2~O}~n~ (3) (H~4~btec = 1,2,4,5‐benzenetetracarboxylic acid; azopy = 4,4′‐azobispyridine), were synthesized by ahydrothermal method and characterized by single‐crystal X‐ray diffraction, elemental analysis, and powder X‐ray diffraction. Compounds 1 and 2 are isomorphic and crystallize in the triclinic space group P$\bar {1}$, exhibiting a 2D grid framework bridged by two types of ligands. Compound 3 also crystallizes in the triclinic space group P$\bar {1}$ and possess an interesting 3D coordination framework with an unprecedented dodecadentate coordination mode and a unique {4^16^.5^10^.6^18^.7}{4^4^.5.6}^2^ topological structure. The ideal topology of 3 has not been encountered in metal–organic framework chemistry, which has been deposited in the Reticular Chemistry Structure Resource under the name zim net. Magnetic studies show that there are antiferromagnetic interactions in both 1 and 2. The cyclic voltammograms of 1–3 in the solid state were also obtained.