The Synthesis and Characterization of Poly(aryl Phosphonate)s PDF Download
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Author: Beth C. Monahan
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Author: Beth C. Monahan
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
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Book Description
Author: Harinder Tamber
Publisher:
ISBN:
Category : Phosphonic acids
Languages : en
Pages : 266
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Book Description
Author: Frederick E. Johnson
Publisher:
ISBN:
Category : Phosphonates
Languages : en
Pages : 686
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Book Description
Author: Ronald Dustan Myrex
Publisher:
ISBN:
Category : Esters
Languages : en
Pages : 120
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Book Description
Author: Victoria Naa Kwale Bampoh
Publisher:
ISBN:
Category : Chalcogenides
Languages : en
Pages : 84
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Author: Tiffany L. Kinnibrugh
Publisher:
ISBN:
Category :
Languages : en
Pages :
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This dissertation focuses on the challenge of developing porous metal arylphosphonates with both high crystallinity and functional porosity by using different synthetic approaches. Metal phosphonates are an extensive class of materials based upon extended inorganic-organic architectures such as chains, layers and three-dimensional networks. Metal phosphonates generally favor extended inorganic architectures leading to pillared materials with no porosity. We found that the use of template molecules, type of ligand and choice of metal ions could be used to deviate from the pillared structure. Many of these structures had interesting properties that were explored. The results can be divided into three areas: We developed non-pillared monovalent metal phosphonates by investigating both the role of water and template molecules in the solvothermal synthesis. The role of water in solvothermal reactions was found to have a profound influence on the structure of monovalent metal phosphonates and the structures could be tailored from zero/one-dimensional to two-dimensional. Non-pillared structures could be synthesized by using template molecules. For a zinc phosphonate, we converted a layered structure into a three-dimensional framework by using small template molecules in the solvothermal reaction. The compound exhibited reversible dehydration behavior. The change in the framework structure and guest positions was monitored during this process. Two different ligands were used in the development of porous aluminum phosphonates. One series exhibited reversible dehydration behavior, which had a dramatic influence on permanent porosity of the material. The stability of the dehydrated phase is a result of the geometry of the aluminum atom, which in some cases has coordinatively unsaturated metal sites. The second series was developed with ion exchange applications in mind therefore the pore environment was tailored to favor ion exchange processes. The most important aspect is that these compounds exhibit high selectivity for Th4+ ions. In total 28 new compounds were prepared, and their utility and structures clarified. The electronic version of this dissertation is accessible from http://hdl.handle.net/1969.1/151103
Author: Kolio D. Troev
Publisher: Elsevier
ISBN: 008047649X
Category : Science
Languages : en
Pages : 308
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Chemistry and Application of H-Phosphonates is an excellent source for those planning the synthesis of new phosphorus-containing compounds and in particular derivatives containing a phosphonate, phosphoramide or phosphonic acid diester group. The rich chemistry, low cost and easy availability of diesters of H-phosphonic acid makes them an excellent choice as synthone in a number of practically important reactions. Phosphonic acid esters are intermediates in the synthesis of important classes of compounds such as alpha-aminophosphonic acids, bisphosphonates, epoxyalkylphosphonates, alpha-hydroxyalkylphosphonates, phosphoramides, poly(alkylene H-phosphonate)s, poly(alkylene phosphate)s, nucleoside H-phosphonates. The synthesis of each of these compound classes is reviewed in detail. Alpha-Aminophosphonic acids are an important class of biologically active compounds, which have received an increasing amount of attention because they are considered to be structural analogues of the corresponding Alpha-amino acids. The utilities of alpha-aminophosphonates as peptide mimics, haptens of catalytic antibodies, enzyme inhibitors, inhibitors of cancers, tumours, viruses, antibiotics and pharmacologic agents are well documented. Alpha-Hydroxyalkanephosphonates are compounds of significant biological and medicinal applications. Dialkyl epoxyalkylphosphonates are of interest because of their use as intermediates in the synthesis of bioactive substances, and as modifiers of natural and synthetic polymers. Bisphosphonates are drugs that have been widely used in different bone diseases, and have recently been used successfully against many parasites. Poly(alkylene H-phosphonate)s and poly(alkylene phosphate)s are promising, biodegradable, water soluble, new polymer-carriers of drugs. Nucleoside H-phosphonates seem to be the most attractive candidates as starting materials in the chemical synthesis of DNA and RNA fragments. The 5'-hydrogen phosphonate-3'-azido-2',3'-dideoxythimidine is one of the most significant anti-HIV prodrug, which is currently in clinical trials. Chapters review the synthesis; physical and spectral properties (1H, 13C, 31P and 17O NMR data); characteristic reactions; important classes of compounds based on these esters of H-phosphonic acid; their application as physiologically active substances, flame retardants, catalysts, heat and light stabilizers, lubricants, scale inhibitors, polymer-carriers of drugs; preparation of H-phosphonate diesters and general procedures for conducting the most important reactions.* provides ideas for the synthesis of phosphonates, phosphoramides and diesters of phosphonic acid (new phosphorus-containing compounds)* reviews structure, spectra and biological activity of H-phosphonates and their derivatives* examines new areas of application of phosphorus-containing compounds
Author: Jason Lee Freeman
Publisher:
ISBN:
Category : Phosphonates
Languages : en
Pages : 168
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Author: Rupert G. McCormack
Publisher:
ISBN:
Category : Inorganic ion exchange materials
Languages : en
Pages : 138
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Author: A. V. Dogadina
Publisher: CRC Press
ISBN: 9783718650514
Category : Science
Languages : en
Pages : 74
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Book Description
This text examines the formation, physical characteristics and chemical properties of 1,3-alkadienephosphonates with various structures. The special features of P-C bond-forming reactions and methods of forming conjugated multiple bond systems as applied in the synthesis of 1,3-alkadienephosphonates are discussed and the application of physical methods, especially 1H-, 13C- and 31P-NMR and X-ray crystallography, in determining the structures of organophosphorus compounds is demonstrated. The principal reactions of 1,3-alkadienephosphonates are presented.
