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Synthesis and Structures of Supramolecular Coordination Compounds with Ligands Containing Nitrogen and Oxygen Atoms

Author: LiuMengJun
Tutor: ChangFei
School: Inner Mongolia University
Course: Inorganic Chemistry
Keywords: supramolecule coordination compound water cluster N-heterocycle carboxylic acid N-oxide organic-phosphnic acid 4,4’-dipyridylamine
CLC: O641.4
Type: Master's thesis
Year: 2009
Downloads: 128
Quote: 3
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Abstract


Six coordination compounds with 3D supramolecular structures are synthesized by empolying N-（phosphonomethyl） iminodiacetic acid （H4pmida） and 2,2’-bipyridine-3,3’- dicarboxylic acid-1,1 ’-dioxide （H2bpdado） and associated ligands 4,4’-dipyridylamine （dpa） as building block, combining with metal ions under solution reaction or solvothermal （hydrothermal） conditions. The crystal structures are determined by X-ray single diffraction and characterized by element analysis, IR, TGA-DSC, etc.. The formulas of the compounds are as follows: [Cu0.67Co0.33（pmida）（Hdpa）]2（Hdpa）2·17H2O（1） [Cu（pmida）（Hdpa）]2[Co（H2O）6]6·8H2O（2） {[Cu（bpdado）（dpa）]·H2O}n （3） {[Cd（bpdado）（dpa）]·H2O}n （4） {[Cu2（CH3COO）3（dpa）2]（CH3COO）·3H2O}n（5） {[Cu2（CH3COO）2（dpa）2（H2O）]（NO3）2·H2O}n （6）Compound 1 and compound 2 are built up by two ligands （N-（phosphonomethyl） iminodiacetic acid （H4pmida） and 4,4’-dipyridylamine （dpa）） combining metal ions. They both consist of mononuclear units with positive and negative ion pairs. These ion pairs and crystal lattice water molecules are connected with each other by hydrogen bonding to form 3D supramolecular architectures. In compound 1, lattice water molecules connect into 2D supramolecular water layers rarely seeing in water cluster compounds through hydrogen bonds. In compound 2, （H2O）10 water clusters are formed between coordinational and crystal lattice water molecules, and their eight member ring chair-like configuration with two dangling water molecules has been rarely reported in the literature.Compound 3 and compound 4 are prepared by 2,2’-bipyridine-3,3’-dicarboxylic acid-1,1’-dioxide （H2bpdado） and 4,4’-dipyridylamine （dpa） reacting with metal ions. They both contain 2D coordinational layers, which further extend into 3D supramolecular networks by hydrogen bonding interactions, forming different 1D channels with water molecules occupy in them simultaneity. In compound 4, hydrogen bonds connect 2D layers into double-fold interpenetrated 3D supramolecular nets.Compound 5 and compound 6 are two different structures, they both obtained by associating acetic acid and 4,4’-dipyridylamine （dpa） ligand with Cu2+ ions. Compound 5 is a 2D structure, hydrogen bonds link the 2D coordinational layers to form 3D supramolecular nets containing 1D channels, water molecules and CH3COO- ions are arrayed. Compound 6 consists of 1D double chains. Hydrogen bonding interactions connect them into 3D supramolecular nets containing 1D channels, water molecules and NO3- ions are arrayed in these channels. Six new compounds have been obtained. Compound 1 and 2 are valuable for the research of water cluster compounds, and compounds 3-6 offer useful experimental data for investigating coordinational polymers which have cavities in there structures.

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CLC: > Mathematical sciences and chemical > Chemistry > Physical Chemistry ( theoretical chemistry ),chemical physics > Structural Chemistry > Complex chemistry ( coordination chemistry )
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