Synthesis,structures And Properties Of Metal Complexes Based On Mixed Organic Ligands Of Nitrogen Heterocyclic And Carboxylic Acid

Recently,with extensive research in complexes,structure and properties of complexes gradually clear into the system,in recent years,due to the complex has many potential applications in optical,magnetic chemical separation and adsorption,catalysis has been extensively studied.Where research on the heterocyclic ligands of the most prominent,since the 5-amino-1-hydrogen tetrazole(Hatz)and biological ligand adenine(Hade),4-amino pyrazolo pyrimidine(H4app)with multiple coordination sites,diverse and complex patterns in different complexes have played a particularly important role in the connection,it has become a hot research field.To explore Hatz,Hade and H4app is induced in the complex process of building a multi-core clusters,multi-dimensional as main organic ligands,the degree of acid-base reaction system and choice of reaction conditions on the structure of the target product,based on these ligands,selected the appropriate linear organic carboxylic acids and aromatic carboxylic acid as co-ligand,reacting with a transition metal salt,this paper prepared 9 two-dimensional or three-dimensional frameworks,and by means of X-ray diffraction,elemental analysis,TGA,X-ray powder diffraction,fluorescence spectroscopy and magnetic characterizations study its structure and properties.The results show that the complex is 1-4 with a three-dimensional structure of the metal based Hatz Co?/Mn? complexes:?Co4(H2O)4(?3-OH)2(atz)2(dsnda)]?n(1),{[Co2(?3-OH)(atz)(pdc)]·(H2O)}n(2),[Mn3(atz)2(suc)2]n(3)and{[Mn2(?3-OH)(atz)(pdc)]·(H2O)}n(4).(Na2H4dsnda=4,8-disulfonate-1,6-naphthalenedicarboxylic acid,H2pdc=2,3-pyridinedicarboxylic acid,H2suc=succinate).1 is based on quadrilateral quad-core metal Co?4 cluster a pair of parallel linked by ?3-OH-groups as the basic structural unit further to form 3D framework;2 and 4 exhibiting an infinite Corner-sharing isosceles triangles linked by ?4-atz-construct the ?-chain,and further form 3D framework;3 is a 3D framework based on a linear trinuclear metal center Mn?3.By regulating the reaction conditions and the pH obtained based Hade/H4app complex 5-9:[Co7(H2O)4(ade)2(?3-OH)6(sip)2]n(5),[Zn2(Hade)(dcph)2(H2O)]n(6),{[Cd3(H2O)4(H4app)2(sip)2]·l.5(H2O)}n(7),{[Cd5(H4app)3(?3-OH)2(dcph)4]·H2O}n(8)and[Cd(H4app)(Htp)(tp)0.5]n(9).(NaH2sip=5-sodium-1,3-acid,H2dcph=4,5-dichloro-1,2-phthalic acid,H2tp=terephthalic acid).5 exhibiting an infinite(3,6)-connected sheet with centrosymmetric Co?7 clusters periodically extended by three-connected sip3-;6 exhibiting a 2D sheet with the Zn?-Hade cations extending by fully deprotonated dcph2-ligands;7 exhibiting an infinite sheet with centrosymmetric Dd?3 clusters periodically extended by sip3-,?3-OH groups and coordinated water molecules;8 exhibiting an infinite sheet with centrosymmetric Cd?5 clusters periodically extended by sip3-,?3-OH groups and coordinated water molecules;9 is a 2D framework based on binuclear metal Cd?2.In summary,obtained by regulating different reaction conditions of different dimensions,the structure of the novel compounds,their properties are diverse field of synthesis and properties of complexes of the need for further research and development.