Of Aromatic Carboxylic Acid Complexes Of Assembly, Crystal Structure And Nature Study

Because the acid complexes have many kinds of coordinate structures and potential application of functional materials, now they become one of coordination chemistry research hot spots. In constructing coordination polymers, the metal ions choice is limited; the choice of ligand is unlimited. By choosing the appropriate bridging ligand can build novel coordination polymers. Organic aromatic carboxylic acid ligands as the oxygen-containing ligands are one of the important families of ligands. Aromatic carboxylic acid ligands have a variety of coordination, so it can be a variety of metal center coordination with the formation of multi-dimensional structure. Coordination carboxylic acid polymers have been widely used in catalysis, materials, medicine and many other fields.The paper take 3,4,5,6-tetrafluorophthalic acid,9,10-anthracene dihydride-9,10-fo rmers-α,β-succinic acid,4,4'-isopropyldouble(2,6-phenoxyacetic acid),2-hydroxy-5-methyliso phthalic acid as the first ligands to synthesize 20 new coordinatiaon compounds having n ot been reported with imidazole2-methy-imidazole,2-ethyl-imidazole,2,2'-bipyridine,4,4'-bipy ridine,1,10-phenanthroline,pyrazole as the second ligands.These complexes were characteriz ed by FT-IR,elemental analysis and X-ray crystallography and 18 crystal structure of comp lexes were analysised.Electrochemical properties and fluorescence properties of several co ordination compounds were studied. Main results are as follows:1.3,4,5,6-tetrafluorophthalic acid was selected as the first ligand to synthesize 11 new coordination compounds through solution reaction with imidazole,l,10-phenanthroli ne,2-methyimidazole,2-ehyl-imidazole,pyrazole,2,2'-bipyridine,4,4'-bipyridine as the second 1 igands. [Cu(tfpa)2(o-phen)2](1 A),[Co (tfpa)(o-phen)2] (2 A),[Co (tfpa)(2,2'-bipy)2] (3 A),[Zn (tfpa)(o-phen)2] (NO3)] (4 A),[Zn2 (tfpa) 2(2,2'-bipy)2](5 A),[Zn2 (tfpa) 2(2-EI) 4](6 A),[Zn (tfpa) (im)2](7 A),[Zn (tfpa) (2-meim)2](8 A),[Zn (tfpa) (pyra)2](9 A),(4, 4'-bipy)2]n(10 A),[Mn (tfpa) (1,10-phen)2](11 A)。The above crystals were characterized parsing out their crystal structure with the X-ray diffraction.1A,6A,8A form distorted te trahedral structure through mutual attraction forces.2A is one-dimensional structure linked by H2O molecular; 3A,7A,10A,11A form two-dimensional planar structure through th e intermolecular hydrogen bonding; 4A,5 A form a gear-like structure through intramolec ular hydrogen bonds; 9A form one-dimensional chain structure through intermolecular for ces. Representation of the 1 A was determined by the electrochemical properties which s hows that metal ions which exit in the compounds are more stable than free ions.2.9,10-dihydro anthracene-9,10-endo-a,B-succinic acid was selected as the first ligand to synthesize 5 new coordination compounds through hydrothermal synthesis with 2-ehyl -imidazole,1,10-phenanthroline as the second ligands.[Cd (dasa) (1,10-phen) 2](1B);[Zn(das a)(1,10-phen)2]n(2B);{Ni2[dasa]2(H2O)2} (3B);{Ni[dasa](1,10-phen)2} (4B);[Zn2(dasa)2(2-ethylim i)2]n(5B). The above five crystal structures were analysised. 1B forms one-dimensional ch ain through the intramolecular hydrogen bonds; 2B,4B form distorted octahedron through the intermolecular forces; 3B forms plane quadrilateral by the formation of intermolecul ar; 5B forms two-dimensional structure by intermolecular hydrogen bonds. The representat ion complexes'thermal stability was determined. The results show that such a insoluble 1 igand as 9,10-dihydro anthracene-9,10-endo-α,β-succinic acid reaction temperature, the PH value, reaction time, cooling velocity have a significant impact, for the crystals'form ation.3.4,4'-isopropyldouble (2,6-phenoxyacetic acid) was selected as the first ligand to synthesize one crystal 1C and one powder 2C through zinc nitrate and cadmium nitrate. The ligand and the zinc ions forming coordination polymers (1C) was analysis. At the s ame time these two compounds were characterized by FT-IR.1C forms one-dimensional structure by intermolecular interactions forces. And the representation 1C of thermal stabil ity was studied.4.2-hydroxy-5-methylisophthalic acid was selected as the first ligand to synthesize o ne crystal 1d and one powder 2d with zinc nitrate and cadmium nitrate。And the 1D for ms three-dimensional cage-like structure. 1D's fluorescent properties were studied at the s ame time.