Luminescent zinc and cadmium complexes incorporating 1,3,5-benzenetricarboxylate and a protonated kinked organodiimine: From a hydrogen-bonded layer motif to thermally robust two-dimensional coordination polymers

Rational synthesis and dimensionality tuning of MOFs from preorganized heterometallic molecular complexes

Rational synthesis of heterometallic MOFs was carried out by the judicious choice of pivalate complexes and a tricarboxylate linker defining their dimensionality.

Sonochemical syntheses of a nanoparticles cadmium(II) supramolecule as a precursor for the synthesis of cadmium(II) oxide nanoparticles

Nanoparticles of a three-dimensional supramolecular Cd(II) compound, [Cd(L)(2)(H(2)O)(2)] (1), (L(-)=1H-1,2,4-triazole-3-carboxylate), have been synthesized by a sonochemical process and characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. The thermal stability of compound 1 in both its bulk and nano-size has been studied by thermal gravimetric (TG) and differential thermal analyses (DTA) and compared with each other. Concentration of initial reagents effects on size and morphology of nano-structured compound 1, have been studied. Calcination of the single crystals and nano-sized compound 1 at 650°C under air atmosphere yields CdO nanoparticles.

Diaqua-bis-{1-[(1H-benzimidazol-2-yl)meth-yl]-1H-1,2,4-triazole-κN}bis-(2,4,5-tricarb-oxy-benzoato-κO)cadmium dihydrate

In the title complex, [Cd(C(10)H(5)O(8))(2)(C(10)H(9)N(5))(2)(H(2)O)(2)]·2H(2)O, the Cd(II) ion lies on an inversion center and is coordinated by two N atoms from two symmetry-related 1-[(1H-benzimidazol-2-yl)meth-yl]-1H-1,2,4-triazole ligands and two O atoms from two monodeprotonated 2,4,5-tricarb-oxy-benzoate anions in equatorial positions and by two water O atoms in axial positions, leading to a distorted octa-hedral environment. In the crystal, complex mol-ecules and solvent water mol-ecules are linked through inter-molecular O-H⋯O, O-H⋯N and N-H⋯O hydrogen bonds into a three-dimensional network. Intra-molecular O-H⋯O hydrogen bonds are also present.

Sonochemical syntheses of a new nano-plate cadmium(II) coordination polymer as a precursor for the synthesis of cadmium(II) oxide nanoparticles

Nanoplates of the three-dimensional coordination polymer, {[Cd(3)(3-pyc)(4)(N(3))(2)(H(2)O)](n) (1), 3-pyc(-)=pyridine-3-carboxylate), have been synthesized by a sonochemical process and characterized by scanning electron microscopy, X-ray powder diffraction, IR spectroscopy and elemental analyses. Cadmium(II) oxide nanoparticles were prepared from thermal decomposition in oleic acid and direct calcination of compound 1 at different temperatures. The thermal stability of nano-sized compound 1 was studied by thermal gravimetric (TG) and differential thermal analyses (DTA). Results show that the size and morphology of the CdO nanoparticles are dependent upon the particles size of compound 1 and the thermolysis temperature. A decrease in the particle size of compound 1 leads to a decrease in the particle size of the CdO, while an increase in the processing temperature leads to an increase in the particle size of the produced cadmium(II) oxide nano-particles.