Synthesis, Structure And Properties Of The Coordination Polymers With V-shaped Carboxylate Ligands

In recent years, designing and constructing coordination polymers synthetized by organic ligands and metal ions has become an interesting research field because they not only have interesting structures but also have a potential application as functional materials. As new type of molecular functional materials, coordination compounds are not only a wealth of topology and the accumulation variety of ways, but also have tremendous potential such as in gas in storage, separation, catalytic properties, thermal stability, optical properties, mechanical properties, magnetic properties and so on.Crystal engineering involved in molecule or chemical group in the crystal structure and properties of the design and control as well as the crystal structure prediction. It is an important way to realize from molecular to functional materials. The design and synthesis of novel structure and the potential value of coordination polymers and inorganic-organic hybrid materials are two important aspects of crystal engineering research.In this paper, the hydrothermal synthesis technique is used to synthetize series of coordination polymers containing the V-shaped carboxylate ligands. This thesis is divided into four chapters.Chapter one: the development history and synthetic method of coordination polymers and research progress of the V-shaped carboxylate ligands coordination polymers were introduced in the Introduction Section.Chapter two: two coordination polymers, that is, (H₃O)[Cu₃(tbip)_3.5(H₂O)₂]·H₂O (1) and (H₃O)[In(tbip)₂]·H₂O (2) synthesized hydrothermally by 5-tert-butyl isophthalic acid, Cu(NO₃)₂·3H₂O and In(NO₃)₃·6H₂O, were introduced. Coordination polymer 1 exhibits a two-dimensional(2D) layered wheel configuration through coupling the V-shaped carboxylate ligands with the Cu(II) ions, and the two-dimensional(2D) wheel configuration further connected with the V-shaped carboxylate ligands to form a kagomélayer topological structure. Coordination polymer 2 exhibits a two-dimensional(2D) layered diamond (4.4)network through coupling V-shaped carboxylate ligands with the In(Ⅲ) ions.Chapter three: three kinds of coordination polymers, namely, [Zn(bpp)(hfipbb)] (3) , [Zn₂(bpy)(hfipbb)₂] (4) and [Co₃(fipbb)₂(D-Hcam)₂(bpp)₂(H₂O)₂]·2H₂O (5) hydrothermally synthesized by 2,2-Bis(4-carboxyphenyl)hexafluoropropane, Zn(OAc)₂·2H₂O and Co(NO₃)₂·6H₂O, were introduced. Coordination polymer 3 exhibits a two-dimensional(2D) layered diamond network through coupling V-shaped carboxylate ligands and N–donor ligands with the Zn(II) ions, and the two-dimensional(2D) layered network further connected with hydrogen bonding to form a three-dimensional(3D) supramolecular structure. The structure of coordination polymer 4 is similar with the coordination polymer 3. However, the coordination polymer 5 is a three-dimensional (3D) metal-organic coordination polymer which can be simplified into a (6)-connected (4⁴.6¹⁰.8) topological network.Chapter fourth: in the Conclusion Section, the structural properties, functions and characteristics of the five synthetized coordination polymers were introduced and the advantage of the V-shaped carboxylate ligands in the construction of coordination polymers was clarified. Furthermore, the influence factors on the structures and properties of coordination polymers were also introduced.