A Aminoacyl Cyano Methyl Anion Bridged Sm (iii), Eu (iii), Synthesis And Properties Of Gd (iii), Of Dy (iii) And Cu (ii) Coordination Polymer Research

Carbamyldicyanomethanide anion has been selected as ligand and five novel complexes have been designed and synthesized, namely, the two-dimensional complexes {[Sm(cda)3(H2O)3]-H2O}n (1) , {[Eu(cda)3(H2O)3]-H2O}n (2) , {[Gd(cda)3(H2O)3]-H2O}n (3), {[Dy(cda)3(H2O)3]-H2O}n (4) and the one-dimensional chain complex {[Cu(cda)(H2O)2]-(ClO4)-3H2O}n (5). The five complexes were characterized by elemental analysis and IR spectroscopy, and their crystal structures determined b y X -ray crystallography. Fluorescent e mission s pectra o f c omplexes (1), (2), (3) and (4) were obtained. The fluorescent emission mechanism, and the some factors that affect the energy and the intensities of the fluorescent peaks were studied. The strong powder second harmonic generation efficiencies for complexes (1), (2), (3) and (4) were found. The determination of variable-temperature magnetic susceptibility for complex (3) and complex (5) was performed. The magnetic data were analyzed with their structure properties, and the further information about the magnetic coupling capacity of Carbamyldicyanomethanide as bridging ligand was obtained.The main characteristics and the contributions of this work are as follows:1. The five novel polynuclear complexes have been designed and synthesized with Carbamyldicyanomethanide anion as bridging ligand.2. It is the first example that the polynitrile complexes display second harmonic generation efficiency. This achievement will benefit the theory and the experiment of the design and the exploration for novel NLO materials.3. The fluorescent emission mechanism and the factors which govern the fluorescent positions and intensities were studied and obtained for the rare-earth complexes with Carbamyldicyanomethanide as bridging ligand. This achievement will benefit the theory and the experiment for the design and the exploration of the novel fluorescent materials.4. The more magnetic coupling information dealing with Carbamyldicyanomethanideas bridging ligand was obtained. The achievements will benefit the designation and the syntheses of the novel molecular magnets, and it will also benefit the understanding of the biology function of metal ions in metallic protein.