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Studies on the Hydrothermal Synthesis and Self-Assembly Principle of Dicarboxylic Acid Coordination Polymers

Author: DingYouBang
Tutor: YinYeGao
School: Shantou University
Course: Inorganic Chemistry
Keywords: Rare earth complexes Crystal structure Dicarboxylic acids The hydrothermal synthesis method
CLC: O631.1
Type: Master's thesis
Year: 2009
Downloads: 73
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Abstract


Presents in the equipped with-bit when the the of the carboxyl group with the metal ion the flexible and and changeable of the equipped with-bit mode when you are done, Therefore, the the the structure of of the carboxylic acid complexes makes is very sensitive to on the For the reaction conditions. The the same of the carboxylic acid as ligand and the metal ion On in the of the reaction under different conditions when, since the the the the uncertainty of of the carboxy group Hotels with bit mode, can be obtained the different structures and the the complexes of the different functions of the, This is characterized by through a controlling the reaction conditions to control the structure of the complexes and The function to provide a the possibility of. In particular is the polyhydric carboxylic acid ligand, different from the Since the connecting the geometric characterized in of the a carboxyl group molecular fragments, be able with a metal ion assembled out of and having a the Hotels with bit of the a novel structure for this polymer, therefore, often be used as a unbridged ligands to a polymer Hotels with bit was prepared . Compared to the a flexible of fat two carboxylic acid, pyridine diacid In addition to the having a the outer the characterized in of the the Hotels with bit of of the two yuan a carboxylic acid ligand, further having a and the achievement for the rigidity and Supplied by the nitrogen atom and the lone electron to the's are decision on of the structure included by the a pyridine ring pairs to the Hotels with bit, Accordingly, having a the the even more a wealth of equipped with-bit mode, at the same time also has a the on the the the selectivity of of the metal ions, these characteristics of clearly has a conducive to to improve the the metal - the the controllability of of the the organic the framework of compounds structure sexual. The of this article the use of the the the the the principle of of design and molecular of the ultra-the molecular chemical molecular self-assembly of the, in order to the the fat the class and pyridine of class two yuan carboxylic acid as the main ligand, be complemented by other nitrogen-containing ligand, the by hydrothermal method using synthesis a a series of of the equipped with-bit of polymerization thereof. And diffraction use the X---ray single crystal, the carried out by the the X--ray powder diffraction and infrared spectroscopy, and and other means to on the their characterization of. On the the carried out a light-emitting the nature of study on to the the compounds has better light-emitting the performance of in some of which are. Through the to the of these studies, on the to the the the characteristics and nature of of of multi-carboxylic acid metal the the assembly of of the complexes With the a preliminary understanding of, thereby get a some of the of perceptual knowledge, of these understanding of on the the there are a important of the learn from significance of on the the the design and application of of of the similar to the compounds in the future. The In this thesis, a total of synthesis a 20 different set of the new compounds. Below we will in accordance with the the different of the synthesis reaction conditions, on them conducted the Classification discussion. First of all, dominated in order to pyridine dicarboxylic acid ligand, through the to Cart of a different second ligand, the a hydrothermal reaction of of the with the transition metal salts of, the there is prepared 4 complexes: {[Ni (2,6-the PDC) 2 ] [Ni (phen) 2 (H 2 O) 2 ] · 7H 2 O} n (1), [Cu (2,6-PDC) (Imz)] n (2), [Cu (2,5-PDC)] < sub> n (3), {[Cd (1,4-BDC) 0.5 (3-pyc) · 2H 2 O] · 2H 2 O} n . (4). X-ray the from an to the Are a 1-D (4) from the OD (1-3) for the - monocrystalline diffraction reveal the the Number of the dimension of in of the These complexes. At the same time show that the: the existence of forward to a wealth of the hydrogen bond and pp of the interaction of to the in the the crystal packing of in the Complexes of. Pair Complexes, the these ultra-molecular the role of self-assembly to plays a the a decisive the role of. In this part, Contact us the role of of the the role of of these non-covalent in the the the crystal in the heap were analyzed. And to d 10 Cd (Ⅱ) complexes to the a 4 of the fluorescence the nature of carried out studied. In addition, the We also systematic manner explore the the the the reaction of the the the competition of the the fat dicarboxylic acid with the the pyridine dicarboxylic acid equipped with-bit. First of all, in order to the to the 2,3 - pyridine dicarboxylic acid as the template agent, the the oblique interspersed of the three-dimensional of the (4,4) equipped with-bit network of the of synthesis the three is isomorphic to has been In diacid - the rare earth complexes, {[Ln 2 < / sub> (μ 3 -ADI) 2 (μ 2 -ADI) · (H 2 O) 4 ] · H 2 O} n (Ln = Er, 5; Tb, 6; Eu, 7) and in the there is no template agent to to participate in the under the, synthesis a 3D complexes [Nd 2 (μ 3 -SEB) 3 · (H 2 O) 2 ] n (8). Subsequently, we utilize the water-heat-reactive, In the the under conditions of the presence of an there is no aliphatic dicarboxylic acid, there is prepared [Nb (2,5-the PDC of the two 2,5-PDC-Ln complexes), (2,5-HPDC)] < sub> n (9) and (Tb of (2,5-of the PDC), (2,5-HPDC)] n (10), and, in the the presence of a different of a fatty acid under,, preparation a five of has a the the polymer of the the equipped with-bit of the mixed-ligand of the comparable the structure of: [Ln (2,5-the PDC) (SL) 0.5 (H 2 O) x ] n (11-15). As a comparison, We also used terephthalic diacid instead of the flexible of a fatty acid for the the second ligand, with different pyridin diacid together with rare earth metal ion reaction, the formation of the the more complex of the equipped with-bit of complexes, [Nd (2,5-PDC) (1,4-BDC) 0.5 · (H 2 O)] n (16), [Nd (2,5-PDC) (1,4-BDC) 0.5 · (H 2 O)] n (17), [Nd 3 (2,6-PDC) 2 (1,4-BDC) 2 (μ 3 -OH) · (H 2 O)] n (18). through the the law of on the the of those complexes self-the assembled analysis , we found that of the the structural characteristics of of the the second ligand on structure of the complexes have a major impact role, for example: Used Rigid-allotment body having the stronger the structure of-led as the than flexible-allotment body sexual. Finally, based to the OF L.Duarte hard and soft acid-base theory (shab) - namely the rare earth ion than the often price of the former the transitional metal ion is a more hard-of the acid, we have designed and synthesis a two of of Mixed Ligand to mixed the metal complexes [NdZn (2,5-the PDC) 2 Cl · (H 2 O) 2 ] n (19), [EuZn (2,5-PDC) 2 (1,4-BDC) 0.5 · (H 2 O) 2 ] n (20). the of the synthesis demo of of the of these complexes the the use of chemical reaction sexual to control the's strategy of the compound structural, the same time, showing the an effective exercise to are the polymer of will be Hotels with bit of the single metal extended to the Mixed Ligand mixtures the The method of of the polymer by the metal coordination bit. thereby, extends the the the of features on metal - organic frameworks Hotels with bit polymer range of applications.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Polymer physics and physical chemistry of polymers > Theory of polymer structure
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