Syntheses and structural characterization of two metal-organic frameworks from tripodal and dipodal ligands

Abstract

Two isomorphic metal–organic frameworks, {[M₃(nbtb)₂(bpe)₃(H₂O)₂] · 2H₂O} _n (M = Co for (1) and Ni for (2)), have been synthesized by the combination of an extended linker 1,2-bi(4-pyridyl)ethene(bpe) and tripodal tecton 5-nitro-1,2,3-benzenetricarboxylic acid. Single-crystal X-ray diffraction studies indicate that 1 and 2 are (4, 5)-connected motifs containing (4² · 6⁷ · 8) (4² · 6⁷ · 8) (6⁴ · 8²) (4² · 6⁴) topologies. The magnetic behavior of 1 exhibits weak antiferromagnetic interaction between metal centers.

Keywords:

• Metal–organic framework
• Topology
• Structure
• Magnetism

Acknowledgment

This work was supported by the Guangdong Medical College.