Substrate-Independent Epitaxial Growth of the Metal-Organic Framework MOF-508a

Plasmachemical deposition is a substrate-independent method for the conformal surface functionalization of solid substrates. Structurally well-defined pulsed plasma deposited poly(1-allylimidazole) layers provide surface imidazole linker groups for the directed liquid-phase epitaxial (layer-by-layer) growth of metal-organic frameworks (MOFs) at room temperature. For the case of microporous [Zn (benzene-1,4-dicarboxylate)-(4,4'-bipyridine)_0.5] (MOF-508), the MOF-508a polymorph containing two interpenetrating crystal lattice frameworks undergoes orientated Volmer-Weber growth and displays CO₂ gas capture behavior at atmospheric concentrations in proportion to the number of epitaxially grown MOF-508 layers.

Sonochemical procedures; the main synthetic method for synthesis of coinage metal ion supramolecular polymer nano structures

During the last two decades, supramolecular polymers have received great attention and the number of their synthesized compounds is still growing. Although people have long been interested in their crystalline network form it was only until 2005 that the first examples of nano- or microscale coordination polymers particles be demonstrated. This review tries to give an overview of all nano supramolecular compounds which were reported from coinage metal ions, their attributed synthetic procedures and to investigate the relation between the dimensions of coinage metal ions (Cu, Ag and Au) coordination and supramolecular polymers with their nano-structural morphologies and dimensions. Eleven compounds (from twenty compounds) with nano-structure morphology were prepared by sonochemical process and Ag(I) coordination and supramolecular polymer nano-structures can be easily prepared by sonochemical procedures.

Syntheses and structural characterization of two new nanostructured Bi(III) supramolecular polymers via sonochemical method

Two new bismuth(III) coordination supramolecular polymers, {[Bi2(Hbpp)(bpp)(μ-I)2I6](Hbpp)·MeOH}n (1) and [Bi(Hbpp)(Br4)] (2), (bpp=1,3-di(pyridin-4-yl)propane) were prepared and were structurally characterized by single crystal X-ray diffraction. Single crystalline one-dimensional materials were prepared using a heat gradient applied a solution of the reagents using the branched tube method. The structural determination by single crystal X-ray crystallography shows that compounds 1 and 2 form monoclinic polymers with symmetry space group P21 in the solid state. These new nanostructured Bi(III) supramolecular compounds, {[Bi2(Hbpp)(bpp)(μ-I)2I6](Hbpp)·MeOH} (1) and [Bi(Hbpp)(Br4)] (2), were also synthesized by sonochemical method. The nanostructures were characterized by Field Emission-scanning electron microscopy (FE-SEM), powder X-ray diffraction (PXRD) and IR spectroscopy.

Solid state conversion of a double helix thallium(i) coordination polymer to a corrugated tape silver(i) polymer

Irreversible solid-state conversion of Tl^I coordination polymer with double helix chain structure to corrugated tape silver(i) polymer has been observed upon mechanochemical reaction of [Tl(μ₂-dcpa)]_n (1) with AgNO₃.