Ferrocene Synthesis Of Pairs Of Succinic Acid Complexes And Its Performance Study

Ferrocenyl-containing coordination polymers have large potential applied value in many fields such as functional materials, they can be used as molecular sensor, molecular magnetic materials, non-linear optical materials and catalyst. On these bases, introducing bulky ferrocenyl groups into the complex systems to get functional ferrocenyl-containing coordination complexes and further exploiting their capability and application have come into being one of the most attractive research fields in modern coordination chemistry.In this paper, six ferrocenecarboxylato-containing complexes were obtained by treating 1,1'-bisferrocenylsuccinate (NaO₂CCH₂CH₂COFcCOCH₂CH₂CO₂Na) with some metal ions under the help of some subsidiary ligands in different ways. Furthermore, a series of these complexes' property of catalyzing ester hydrolyze was also studied.Firstly, treatment of NaO₂CCH₂CH₂COFcCOCH₂CF₂CO₂Na with Zn(II), Cd(II) salt in presence of [1,10]phenanthroline, L1, L2 afforded three complexes 1, 2, 3. [L1=1,1' -(1,4-butanediyl)bis-1H-benzimidazole), L2= 1,10-bis(triazol-1-ylrnethyl)biphenyl)], and we have got their crystal structure. In complex 1, the ferrocenecarboxylato units use the same way of monodentate coordinating to the metal ions to form a one-dimensional chain polymer, at the same time, the phen units use N atoms coordinating to the metal ions, acting as subsidiary ligands at the same side of the chain, and three-dimensional structure is formed by the interaction ofπ-πstacking. Complex 3 takes on a 2D net framework with the bridging effect of L2. In this complex, metal center is in a four coordinated environment which is the same as complex 1. Zn ions are connected by 1,1'-bisferrocenylsuccinic and L2 alternately leading to a 1D chain structure, then the complex is fabricated to a 2D net structure by the link of 1,1'-bisferrocenylsuccinic between the chains. Complex 2 presents a 1D structure although the bridging ligand L1 has also participated in coordination, it is perhaps because the radius of Cd ion is bigger than that of Zn ion and L1 has bigger flexibility.Furthermore, we use [Cd(O-2CH₂CH₂COFcCOCH₂CH₂COOH)₂·(H₂O)₄]_n as precursor, and then let imidazolyl, 2,2'-dipyridyl substitute the H₂O molecule of it, We have succeeded in this work and got two 1D offspring polymers 4, 5. Moreover, the complexes have the same framework character as the precursor. Because the precursor has uncoordinated group, we try to let it participate in coordination by changing the alkalinity acidity of this system, fortunately, we got a 1D polymer 6. This just show that we can get compounds which have anticipative structure through substitution reaction of precursor or by changing the reactive condition of the system.Finally, a series of these complexes' property of catalyzing ester hydrolyze was studied. Our purpose is simulating the catalytical action of enzyme in biologic system, so we can directly investigate the factors relating to the functions of enzyme by studying the catalyzing behavior of model molecules imitating enzyme's functions. And it is a base of synthesizing high performance model enzyme. From the data we believe that Zn is the active center of ester hydrolyze reaction; If the complexes have the same metal center and coordination number, the one presents a better effect in this reaction when its structure is simpler; The zinc complex whose metal center is not coordinate saturation puts up better catalytical effect; And it can enhance the effect of catalyze ester hydrolyze efficaciously when the coordination polymer has imidazolyl group.