Methylamine Synthesis And Characterization Of Acyl-dicyano-methyl Anion Complexes

Carbamyldicyanomethanide anion has been selected as ligand and five novel complexes have been designed and synthesized, namely, the one-dimensional chain complex {[Zn(cda)2(CH3OH)2]-4CH3OH}n (1), the mono-nuclear complex [Zn(cda)2(H2O)4]-2H2O (2), the three-dimensional net structure complex {[Mn(cda)2]-2CH3OH}n (3), the three-dimensional net structure complex {[Cd(cda)2] 2CH3OH}n (4), and the mononuclear complex [Zn(cda)2(H2O)4]-2H2O (5). The five complexes were characterized by elemental analysis and IR spectroscopy, and their crystal structures determined by X-ray crystallography. Except complex(5)the other four complexes display the strong fluorescent emission property. The emission mechanism was studied and the some factors that affect the positions and the intensities were studied. The determination of variable-temperature magnetic susceptibility for complex (3)was performed and the magnetic data were analyzed, and the mediating capacity of Carbamyldicyanomethanide as bridging ligand was obtained. The micro-porosities in complex (3) and complex(4) were studied.The main characteristics and the contributions of this work are as following:1. The five novel complexes have been designed and synthesized with a novel polynitrile ligand, Carbamyldicyanomethanide anion, and their structures were characterized.2. The fluorescent study were performed for the four complexes and a new kind of fluorescent compound has been found. The mechanism of the fluorescent emission and the factors that affect the intensity were obtained. This study will benefit theexploration of a new kind fluorescent materials, especially in the field of the theory and the experiment.3. The first magnetic study was performed on the multi-nuclear complex with carbamyldicyanomethanide as bridging ligand, and the coupling capacity of carbamyldicyanomethanide anion as bridging ligand was obtained. The study 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.4. Two novel complexes with micro-porosity have been synthesized and the structure specialties were studied. The study may be important for the synthesis of a new kind of nano-materials with the structure of micro-porosity.