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Synthesis And Characterization Of Coordination Polymers With Microporous Structure

Posted on:2009-03-23Degree:DoctorType:Dissertation
Country:ChinaCandidate:S F ZhangFull Text:PDF
GTID:1101360245458617Subject:Marine Chemistry
Abstract/Summary:PDF Full Text Request
In the past decade, Crystal engineering of microporous coordination polymers has become one of the most intensive fields in inorganic chemistry. Compared to the traditional zeolite sieve materials, microporous coordination polymers display particular adsorption properties owing to their abundant channel structures from sizes to shapes. Now, their potential applications have being exploited and developed in many unconventional fields such as gas adsorption. As good gas adsorption materials, coordination polymers with ordered channel structures and good stability are essentially needed. Employing hydrothermal technique, we have successfully isolated 13 new compounds. The structures of these compounds have been determined by single-crystal X-ray diffraction, and further characterized by IR, elemental analysis, and thermogravimetric analysis. The UV and fluorescence behaviors of some compounds have been studied. Our work is mainly focused on:Firstly, the recent results of the work in the area of microporous coordination polymers were reviewed. The structural type, property and application of some notable compounds are also presented and summarized. Then, the synthetic methods and some physical measurements for these compounds were introduced.Under the hydrothermal condition, we have successfully prepared 13 new compounds:(C19H15N4)2(NO3)2·3H2O (3-3), (C19H15N4)2[CdCl4] (3-4), 2Ag(tta)·AgNO3 (3-5), Cu8(tta)15(H2O)Cl (3-6), [Zn(5-CH3-tta)2(isoH)2] (BDC) (3-7), Pb[(PO3)2C(OH) CH3]·H2O (4-1), Ni(C5H4NCOO)2·4H2O (5-2), Co(C5H4NCOO)2 (H2O)2·2H2O (5-3), [CdCl2(C13H12N2O)2] (5-4), (C6H4(COOH)S)2 (5-5), (Deta)(ClO4)NO3 (5-6), (NH4)2[γ-Mo8O26] (6-1), and (NH4)2[Mo4O13] (6-2). These compounds show rich structural diversities. For example, compound 3-5, 3-6 and 3-7 are three dimensional framework structures with nanoporous based on tetrazoles and transition metals; Compound 3-3, 3-4, 5-2, 5-3, 5-4, 5-5, and 5-6 are supramolecular structures with hydrogen bond andπ-πinteraction; Compound 4-1 is a two dimensional layered structure based on biphosphonate, which is the first (5,5) connected net with (47·63) (48·62) topology. Compound 6-1 and 6-2 are molybdates. 6-1 is a one-dimensional chain containing the famous polyoxoanionβ-(Mo8O26)4- cluster and compound 6-2 is a two-dimensional layer with 3-membered ring and 5-membered ring and shows an unusual (3,4,5,6)-connected (32·4)(32·53·8) (3·42·54·6·82)(34·43·54·64) topology.Finally, the main achievements and conclusions in this thesis were summarized. The further research plan in this project has also been proposed.
Keywords/Search Tags:microporous compound, supramolecular structure, tetrazole, phosphonate, hydrothermal synthesis, crystal structure
PDF Full Text Request
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