Control of topology and dimensionality by aromatic dicarboxylate pendant arm position and length in cadmium coordination polymers incorporating a hydrogen-bonding capable kinked dipyridine ligand

Crystal structure of catena-[aqua((4-carboxyphenyl)acetato-κO)(μ2-(4-carboxyphenyl)acetato-κ2 O:O′)bis(4,4′-ethene-1,2-diyldipyridine-κN)manganese(II)], C42H36N4O9Mn

C42H36MnN4O9, monoclinic, P21/c (no. 14), a = 9.6432(10) Å, b = 8.8336(10) Å, c = 42.379(5) Å, β = 92.053(1)°, V = 3607.7(7) Å3, Z = 4, R gt (F) = 0.0434, wR ref (F 2 ) = 0.0910, T = 296(2) K.

CuII–PDC-bpe frameworks (PDC = 2,5-pyridinedicarboxylate, bpe = 1,2-di(4-pyridyl)ethylene): mapping of herringbone-type structures

This work explores new metal–ligand combinations to produce flexible SCFs based on 3-c herringbone layers. The work analyses this type of layers, and provides correlation tools for the structural parameters.

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.

catena-Poly[[[(di-2-pyridylamine-κ2N2,N2')copper(II)]-μ-benzene-1,3-dicarboxylato-κ3O1,O1':O3] monohydrate], a zigzag coordination polymer with strong π-π interactions

The novel title coordination polymer, {[Cu(C(8)H(4)O(4))(C(10)H(9)N(3))]·H(2)O}(n), synthesized by the slow-diffusion method, takes the form of one-dimensional zigzag chains built up of Cu(II) cations linked by benzene-1,3-dicarboxylate (ipht) anions. An exceptional characteristic of this structure is that it belongs to a small group of metal-organic polymers where ipht is coordinated as a bridging tridentate ligand with monodentate and chelate coordination of individual carboxylate groups. The Cu(II) cation has a highly distorted square-pyramidal geometry formed by three O atoms from two ipht anions and two N atoms from a di-2-pyridylamine (dipya) ligand. The zigzag chains, which run along the b axis, further construct a three-dimensional metal-organic framework via strong face-to-face π-π interactions and hydrogen bonds. A solvent water molecule is linked to the different carboxylate groups via hydrogen bonds. Thermogravimetric and differential scanning calorimetric analyses confirm the strong hydrogen bonding.