Based On V Aromatic Carboxylic Acid And Linear Nitrogen Ligand Building, Structure And Properties Of Coordination Polymer Research

Nowadays, as coordination chemistry has become the key joint of numerous fields with its incredible development and improvement, Metal-Organic Frameworks (MOFs), which have various complicated structures and extensive composite properties, are becoming the focus of more and more chemists from all branches. As a kind of molecular materials, coordination polymers exhibit so many extraordinary properties that we are attracted to devote ourselves into this changeable and challenging field with great enthusiasm, aiming to study and develop the directing strategies of molecular self-assemble, crystallography and novel coordination materials. The assemble of Metal-Organic Frameworks (MOFs) can be greatly influenced by a series of synthetic conditions, such as the effect of temperature, solvent system, the structure of organic ligand, the radius of metal ion, pH value of the synthetic system, the existence of counter ion and template etc, thus, the ideal result of constructing coordination polymers is to get the target product accurately conformed to the initial design. Presently, aromatic polycarboxylate ligands, as a good option for the construction of novel multi-functional Metal-Organic Frameworks (MOFs), are widely used for their prominent aromatic frameworks, good coordination abilities, plural coordination modes and multiple coordination sites.Based on the previous works in this field, V-shaped aromatic polycarboxylate ligand and different N-donor auxiliary ligands are selected as the building blocks to obtain the nine novel coordination polymers listed below through the hydrothermal and diffusion reactions with designated transition metal ions:[Pb(bpdc)]n (1),[Co(bpdc)(phen)]n (2),[Zn2(bpdc)(bipy)]n (3),[Co2(bpdc)(bipy)]n (4),{[Cd2(bpdc)2(bpa)2.5]·6H2O}n (5),[Ni2(bpdc)2(bpp)2(H2O)]n (6),[Ni(HCOO)2(bipy)(H2O)2]n (7),[Ni3(SO4)3(bipy)2(H2O)11]n (8),[Cu(ClO4)(bipy)2(H2O)5]n (9). Structures of the obtained coordination polymers have been verified by X-ray single crystal diffraction and characterized by PXRD analysis, IR spectra and thermal analysis. It is revealed that the obtained coordination polymers have good purity, fine consistency with X-ray single crystal diffraction and good thermal stability. After some further fluorescent tests on some of the coordination polymers mentioned above, a preliminary conclusion on luminescence of coordination polymers can be reached.