Sonochemical syntheses of two nano-sized lead(II) metal–organic frameworks; application for catalysis and preparation of lead(II) oxide nanoparticles

• Nano-sized Pb(II) coordination polymers, were synthesized by sonochemical irradiation.
• Appropriate nano-sized of compounds obtained at a concentration of 0.05 M and 0.1, respectively.
• Calcination of compounds in bulk and nano-size at different temperatures and sizes produced nanoparticles of PbO.
• Particle sizes and morphology of the PbO nanoparticle depend on time, calcinations temperature and size of precursor.
• Decrease in size of compounds HMTI-1 and HMTI-2 lead to increase the catalysis selectivity.

Nanostructures of the porous three-dimensional coordination polymers, [Pb(4-bpdh)(NO3)(H2O)]n (HMTI-1), and [Pb(4-bpdh)(NO3)]n (HMTI-2), {4-bpdh = 2,5-bis(4-pyridyl)-3,4-diaza-2,4-hexadiene}, have been synthesized by a sonochemical process at different concentrations and characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Lead(II) oxide nanoparticles were prepared from thermal decomposition in oleic acid and direct calcination of compounds HMTI-1 and HMTI-2 at different temperatures. The results of this study indicated that the size of the coordination polymer precursor and temperature correlates to the particle size of the formed lead(II) oxide nanoparticles. Also results show that a decrease in the particles size of compounds leads to a decrease in the particles size of the PbO. In other hand decrease in size of compounds lead to increase in catalysis activity too.