Sonochemical syntheses and characterization of new nanorod crystals of mercury(II) metal–organic polymer generated from polyimine ligands

Abstract

Nanorod crystals of two new mercury(II) [Hg(II)] coordination polymers, [Hg(4-bpdh)Br₂] _n (1) and [Hg(3-bpdh)Br₂] _n (2) {4-bpdh = 2,5-bis(4-pyridyl)-3,4-diaza-2,4-hexadiene and 3-bpdh = 2,5-bis(3-pyridyl)-3,4-diaza-2,4-hexadiene}, were prepared from the reaction of Hg(II) bromide with 4-bpdh and 3-bpdh by a sonochemical method. The nanorod crystals of 1 and 2 were characterized by scanning electron microscopy, X-ray powder diffraction, and IR spectroscopy. Compounds 1 and 2 were structurally characterized by single-crystal X-ray diffraction. The thermal stabilities of 1 and 2 were studied by thermal gravimetric and differential thermal analyses, which revealed that nanostructures of 1 and 2 are somewhat less stable than their bulk materials.

Keywords:

• Sonochemical
• Nanoparticle
• Mercury(II)
• 2,5-Bis(4-pyridyl)-3,4-diaza-2,4-hexadiene
• 2,5-Bis(3-pyridyl)-3,4-diaza-2,4-hexadiene

Acknowledgments

This work was supported by the Tarbiat Modares University.