Coordination polymer

About: Coordination polymer is a research topic. Over the lifetime, 11988 publications have been published within this topic receiving 212219 citations.

Novel noncentrosymmetric zinc coordination polymer containing an unusual zinc carboxylate-sulfonate substructure with a (10,3)-d topology and its second-harmonic-generation properties.

Abstract: A novel 3D coordination polymer, Zn2(μ2-OH)(SIP)(DPP) (1), with mixed ligands of 5-sulfoisophthalate (SIP) and 1,3-di-4-pyridylpropane (DPP), has been hydrothermally synthesized and characterized. 1 contains an unusual 3D subnet with distorted (10,3)-d topology and left/right-handed helical channels. Second-harmonic-generation (SHG) measurements revealed that the material has a strong SHG response (∼2.5 times that of potassium dihydrogen phosphate (KDP)) and is phase-matchable. In addition, photoluminescent and thermogravimetric analysis were also performed on 1.

Towards Molecular Wires Based on Metal‐Organic Frameworks

Abstract: The formation of one-dimensional structures on nanoscale is one of the main goals of modern nanotechnology. The aim of these efforts is to find conductive long molecules that could serve as molecular wires in nanocircuits. In recent years, electrical conductivity in several organic and metal-organic systems has been studied to this end. In principle, DNA is one of the most attractive molecules for molecular wire owing to its well-known self-assembly chemistry and controllable structural diversity. However, the ability of DNA to conduct electricity is still controversial. In principle, binding of metal ions to organic molecules seems to be a suitable method for improving conductivity. Therefore, some studies were carried out with the so-called M-DNA as an alternative to increase conductivity on DNA. We have selected the 1D-coordination polymer [Cd(6-MP–)2]n (6-MP– = 6-mercaptopurinate) as a feasible structural model that is suitable for providing basic information about the electrical properties of M-DNA.Work with this coordination polymer revealed several aspects concerning the systematic search for new adsorption methods for coordination polymers on surfaces, their morphological and physical characterization, and opened a new playground for the study of coordination polymers as potential molecular wires. In this microreview, we focus on the description of several methods dealing with the isolation of single chains from crystals of these supramolecules, and different pathways to obtain molecular assemblies are also described. Methodologies and characterization techniques are illustrated with the results obtained with different coordination polymers.(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)

Hybrid Organic-Inorganic Framework Structures : Influence of Cation Size on Metal-Oxygen-Metal Connectivity in the Alkaline Earth Thiazolothiazoledicarboxylates

Abstract: We report the synthesis of four organic−inorganic frameworks of alkaline earth cations with the organic ligand 2,5-thiazolo[5,4-d]thiazoledicarboxylate (C6N2S2O42−, Thz2−). Structures with remarkably different connectivities result when Mg2+, Ca2+, Sr2+, and Ba2+ react with Thz2−. Mg(Thz)(H2O)4 (I) forms a 1-D coordination polymer in which one carboxylate oxygen on each terminus of the ligand connects individual MgO6 octahedra from their axial positions, while the remaining equatorial sites are coordinated by water molecules. Ca2(Thz)2(H2O)8 (II) forms a 1-D coordination polymer in which dimeric clusters with 7-fold Ca coordination are connected via the ligand in a linear fashion, with a second, uncoordinated Thz2− providing charge balance. Sr(Thz)(H2O)3 (III) has 1-D infinite inorganic connectivity built from edge-sharing SrO7N polyhedra having one carboxylate oxygen and one water molecule acting as M−O−M bridges. Ba2(Thz)2(H2O)7 (IV) has 2-D inorganic connectivity based upon face- and edge-sharing BaO9N...