Download or read book Synthesis of Functional Metallosupramolecular Complexes written by Nicola Michelle Cox and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis describes three areas of research which involve preparation of novel pyridyl-thiazole-containing ligands and the formation of their complexes with transition metal ions. Chapter 2 describes the preparation, complexation chemistry and photophysical behaviour of ligands L1 and L2 which contain pyrene moieties. The emission properties of pyrene are highly dependent on its environment, and so it was proposed that it could be used as a probe to elucidate solution conformations of complexes. It was shown that incorporation of a pyrene moiety into the ligand strand and subsequent measurement of the emission spectra of its complexes with Cu+ and Cd2+ gave information about their solution state conformations which correlated well with the solid state structures. In Chapter 3, synthesis and coordination complexes of ligands L3 and L4, which contain substituents capable of binding anions, are described. L3 forms a mononuclear complex with Zn(II) which binds two perchlorate anions via the amide groups on the two substituents. However, with Cu(I), L3 and L4 form dinuclear double helicates which have a binding "pocket" at each end of the complex. Both [Cu2(L3)2](ClO4)2 and [Cu2(L4)2](PF6)2 form one-dimensional polymers; the complexes are held together by bridging perchlorate and hexafluorophosphate anions, respectively. Finally, in Chapter 4, allosteric control of the complexation behaviour of ligand L5 is described. L5 contains amine groups on the 3,3'-positions of the bipyridine core which can react with ketones, forming a cyclic aminal product. Reaction with cyclohexanone was used to control the metal specificity of the ligand by restraining the torsion angle between the two pyridine groups and forcing the ligand into planarity. In general, L5 formed dinuclear double helicates with tetrahedral metals and mononuclear complexes with octahedral metals, as expected. Upon reaction with cyclohexanone, mononuclear species were observed with Hg2+, Zn2+, Cd2+ and Ag+. Experiments were then carried out with mixtures of metal ions and two trends were observed: firstly, when L5 is mixed with octahedral and tetrahedral metals, species containing the octahedral metal are favoured. Where two octahedral metals are used species containing the metal with the larger ionic radius are formed preferentially. After reaction with cyclohexanone, only mononuclear species of the octahedral metals are observed in every case.
Download or read book Functional Metallosupramolecular Materials written by John Hardy and published by Royal Society of Chemistry. This book was released on 2015-07-17 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is great interest in metallosupramolecular materials because of their use in magnetic, photonic and electronic materials. Functional Metallosupramolecular Materials focuses on the applications of these materials covering the chemistry underlying the synthesis of a variety of ligands to coordinate various metal ions and the generation of 2D and 3D materials based on these constructs. The book starts by looking at different metallosupramolecular systems including naturally occurring functional metallosupramolecular materials; DNA-based metallosupramolecular materials; metallopolymers; metallogels as well as functional materials based on MOFs. Subsequent chapters then systematically cover the different applications such as molecular computation, spin-crossover, light harvesting and as photocatalysts for the production of solar fuels. The book provides an overview of functional metallosupramolecular materials that will be of interest to graduate students, academics and industrial chemists interested in supramolecular chemistry, materials science and the materials applications. Priced at £159.00, US$260.00, €198.75
Download or read book Metallomacrocycles written by Hai-Bo Yang and published by Royal Society of Chemistry. This book was released on 2018-10-05 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive overview of metallomacrocycles from designing complex functional metallosupramolecular systems to their applications.
Download or read book Functional Metallosupramolecular Materials written by John George Hardy and published by Royal Society of Chemistry. This book was released on 2015-07-13 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is great interest in metallosupramolecular materials because of their use in magnetic, photonic and electronic materials. Functional Metallosupramolecular Materials focuses on the applications of these materials covering the chemistry underlying the synthesis of a variety of ligands to coordinate various metal ions and the generation of 2D and 3D materials based on these constructs. The book starts by looking at different metallosupramolecular systems including naturally occurring functional metallosupramolecular materials; DNA-based metallosupramolecular materials; metallopolymers; metallogels as well as functional materials based on MOFs. Subsequent chapters then systematically cover the different applications such as molecular computation, spin-crossover, light harvesting and as photocatalysts for the production of solar fuels. The book provides an overview of functional metallosupramolecular materials that will be of interest to graduate students, academics and industrial chemists interested in supramolecular chemistry, materials science and the materials applications.
Download or read book The Design and Synthesis of Bridging Para dioxolenes written by and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of para-dioxolene bridging ligands with bis-tridentate or bis-bidentate coordination pockets have been prepared. These ligands were designed to serve as building blocks in the preparation of functional metallosupramolecular structures. The bis-tridentate dipyridyl-diazaanthraquinones have topologies suitable for the preparation of [2 x 2] grids or larger extended structures. Employing a double condensation reaction between 1,3-diamino-4,6-benzenedicarboxaldehyde and 2-acetyl pyridine successfully afforded a cisoid binding diazaanthraquinone. The redox activity of the latter revealed it is more easily reduced than structurally similar 1,5- and 1,8-diazaanthraquinones. The synthesis of an analogous ligand displaying transoid coordination pockets proved challenging. Several approaches were attempted however the preparation of key intermediates 1,4-dinitro-2,5-benzenedicarboxaldehyde and 2,5-diamino-1,4-(hydroxyI-methyl) benzene were unsuccessful. A collection of bis-bidentate 2,5-bis(phosphino)1,4-dioxolenes were prepared with diphenyl, diisopropyl and diethoxy substituents at the phosphorus center. 2,5- Dibromo-1,4-dimethoxybenzene was reacted with the appropriate chlorophosphine under lithiation conditions to afford the dimethoxy compound, which was subsequently deprotected to the hydroquinone state with a Lewis acid. The diphenylphosphino hydroquinone was oxidized using phenyliodonium bisacetate, however efforts to oxidize other hydroquinone precursors to the targeted quinone state proved challenging. Diphenyl and diisopropyl phosphino hydroquinones were successfully coordinated with diamagnetic palladium hexafluoroacetylacetonate precursors. The resulting bimetallic bis(phosphino) dianion complexes were subsequently oxidized to the semiquinone state using silver (I) hexafluorophosphate and studied to determine the distinctive features of the semiquinone ligand.
Download or read book Supramolecular Coordination Complexes written by Sankarasekaran Shanmugaraju and published by Elsevier. This book was released on 2022-10-28 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Supramolecular Coordination Complexes: Design, Synthesis, and Applications discusses the growth of the field and explores the advantages, opportunities and latest applications of supramolecular complexes. Beginning with an introduction to design principles, synthetic methods, and post-synthetic functionalization of supramolecular complexes, the book goes on to compile the different analytical and computational modeling methods used to understand the structure and functional properties of supramolecular structures. Applications of supramolecular complexes in biomedicine, sensing, catalysis and materials are then explored in detail. Drawing on the knowledge of a global team of experts, this book provides a wealth of interesting information for students and researchers working in the design, synthesis or application of such complexes. Discusses cutting-edge approaches for the investigation of supramolecular coordination chemistry Summarizes a varied range of supramolecular coordination, complex designs and applications Highlights the interdisciplinary connections between supramolecular chemistry and the fields of biology and materials science
Download or read book The Design and Synthesis of Bridging Para dioxolenes written by Sharon Lindsay Caldwell and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metal Complexes and Metals in Macromolecules written by Dieter Wöhrle and published by Wiley-VCH. This book was released on 2003-07-09 with total page 700 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metals and metal complexes can form compounds with organic macromolecules that show amazing properties. As is so often the case, nature leads by example. Synthetically produced model compounds, such as phthalocyanines, porphyrines or metalloproteins, as well as metallorganic polymers have aroused much interest in materials science. Their special magnetic, electrochemical and photochemical properties open up new perspectives in microelectronics and sensors. This compact manual is aimed at all organic, inorganic, polymer and physical chemists as well as materials scientists looking for competent and detailed information on the current state of this interdisciplinary area of research. It covers all questions relating to the targeted design of metallic macromolecules, from proven synthesis methods right up to the latest strategies. It also treats major progress in the determination of their structures, the physical-chemical properties of promising compounds and their potential in microelectronics and sensors. Furthermore, the most important methods of synthesis and investigation are presented in detail in an experimental section, while a comprehensive collection of pertinent original literature round s off this unique reference on all matters relating to macromolecular metal complexes.
Download or read book Functional Supramolecular Materials written by Rahul Banerjee and published by Royal Society of Chemistry. This book was released on 2017-05-09 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the structure and function of organic and metal-organic supramolecular materials, which will be of interest to students and researchers in this field.
Download or read book Miescher Max 1964 written by and published by . This book was released on with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Zeitungsausschnitte.
Download or read book Late Transition Metal Carboryne Complexes written by Zaozao Qiu and published by Springer Science & Business Media. This book was released on 2012-01-05 with total page 143 pages. Available in PDF, EPUB and Kindle. Book excerpt: Zaozao Qiu shows in this thesis that transition metals can mediate or catalyze the cycloaddition or coupling reactions of carboryne with alkynes or alkenes to afford benzocarboranes, alkenylcarboranes or dihydrobenzocarboranes. These results represent powerful strategies to assemble useful complex molecules from very simple precursors in a single operation. Carboranes have many applications in medicine. However, their unique structures make derivatization difficult and the limited efficient synthetic methods to obtain functional carborane materials have restricted applications of carboranes within a narrow scope. This work breaks a new ground in metal-carboryne chemistry and will have a significant impact on synthetic, cluster and materials chemistry.
Download or read book Design and Synthesis of Heteroleptic and Heterometallic Metallo Supramolecular Terpyridine Architectures written by Rajarshi Sarkar and published by . This book was released on 2015 with total page 162 pages. Available in PDF, EPUB and Kindle. Book excerpt: Inspiration from biological assemblies in Nature has produced an extraordinary amount of research in supramolecular chemistry. Various non-covalent interactions have been employed to design and synthesize numerous sophisticated architectures with unique structural and functional properties. Metallo-supramolecular constructs are primarily synthesized in a homoleptic assembly; whereas, a preprogrammed monomer is reacted with a suitable metal ion to produce the desired, highly symmetric architectures. On the other hand, structural variance in the supramolecular materials is instilled mainly by step-wise or dynamic assembly protocols. Owing to the unavailability of suitable building blocks and lack of control over the outcome of the assembly, study of these assembly methods has been limited. Two novel terpyridine-based bimetallic triangles were synthesized via a less explored supramolecular fusion approach. Syntheses of two homometallic cyclic trimer and two metallo-squares were achieved, and they were characterized by NMR and MS techniques. Mixing of triangular and the tetrameric units produced the desired bimetallic triangular complexes in quantitative yield. The multinuclear structures were characterized by 1H, 2D-COSY, 2D-NOESY, ESI- and TWIM-MS data. Tandem MS data provided information on the stability of these triangles. UV-vis and luminiscence data indicated metal-ligand charge transfer. Three bimetallic triangles were constructed by a step-wise directed assembly method. An oligomeric trimer was synthesized from a 60o-directed bisterpyridine ligand and was characterized by NMR and MS techniques. Three heterobimetallic triangular architectures were obtained by reacting the oligomeric trimer with Zn(II), Cd(II), and Fe(II). 1H, 2D-COSY, and 2D-NOESY NMR, ESI- and TWIM-MS data confirmed the proposed structures. Luminescence data showed the emission intensities of the triangles are lower than the linear trimer indicating quenching effect of Zn(II), Cd(II), and Fe(II) centers. Synthesis of a structural mimic of first-generation Sierpiński triangle was achieved via dynamic supramolecular assembly. The two required bis- and tetrakis-terpyridine ligands were synthesized and characterized. The ligands were reacted with Cd(II) in precise 1:1:3 molar ratio to obtain the desired complex in near quantitative yield. 1H, 2D-COSY, and 2D-NOESY NMR, ESI- TWIM-MS, and collision cross-section data confirmed the presence of a Sierpiński triangle as the sole product of the reaction. TEM provided the visualization of the desired architecture, shape, and size of the observed molecules, which fit perfectly the simulated parameters.
Download or read book Direct Synthesis of Metal Complexes written by B.I. Kharisov and published by Elsevier. This book was released on 2018-04-19 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt: Direct Synthesis of Metal Complexes provides in-depth coverage of the direct synthesis of coordination and organometallic compounds. The work is primarily organized by methods, but also covers highly relevant complexes, such as metal-polymer coordination compounds. This updated reference discusses recent developments in cryosynthesis, electrosynthesis, and tribosynthesis (popular as it doesn’t require organic solvents), with special attention paid to ‘greener’ methodologies and approaches. Additionally, the book describes physical methods of zero-valent metal interaction with organic matter, including sputtering, ultrasonic treatment and synthesis in ionic liquids. The book presents completely new content as a follow-up to the 1999 Elsevier Science publication Direct Synthesis of Coordination and Organometallic Compounds that was edited by Dr. Garnovskii and Dr. Kharisov. Covers current methods and techniques of metal interactions with organic media leading to metal chelates, adducts, di- and polymetallic complexes, metal-containing macrocycles, supported coordination compounds (i.e., metal complexes on carbon nanotubes), and more Describes reactivities of distinct forms of elemental metals (powders, sheets, nanoparticles (including a host of less-common metal nanostructures) with organic phase (liquid, solid and gaseous) and water Includes experimental procedures, with examples of direct synthesis, at the end of each chapter
Download or read book Terpyridine based Metallo supramolecular Architectures written by Hany El-batal and published by . This book was released on 2013 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: The research and applications of functional materials continue to grow rapidly in order to match the materials and energy needs of an increasing population. In this regard, perylene is a stable, organic material that possesses a rich chemistry and unique chemical, physical, and electronic properties. The molecular organization into predesigned geometries such as: cages, dendrimers, macrocycles and polymers, can add a profound enhancement to the material functional characteristics. At the heart of metallosupramolecular chemistry, tpy-M-tpy binding is a pivotal tool to construct complex and functional architectures. This dissertation reviews the chemical, structural, physical, and electrochemical properties of perylene with an emphasize on its metallosupramolecular chemistry. The synthesis of perylene-containing bis-, tetrakis-, and hexakis-terpyridine ligands along with their corresponding heteroleptic tpyRu11tpy complexes was achieved. These high molecular weight nano-dendritic architectures were characterized using 1H NMR, 13C NMR, COSY, and ESI-MS. These complexes exhibit broad absorption spectra (250-625 nm) and high molar absorption coefficients that are proportional to the number of photoactive units. The synthesis of supramolecular dyes based on tpy-Ru11-tpy motifs connected to perylene-core either in bay- or peri-positions was demonastrated. The structures of these materials were confirmed using a combination of 1H NMR, 13C NMR, COSY, ESI-MS, and their electrochemical properties were studied via Cyclic Voltametry. These dyes were utilized as active ingredients for DSSCs, of which the photovoltaic properties were described. Fluorescent cyclic metallosupramolecular architectures were obtained via tpyZn11tpy mediated self-assembly of two aminobisterpyridine containing perylene ligands that were synthesized in a multistep procedure, the chemical structure and purity of both ligands and complexes were assured using a combination of 1H NMR, 13C NMR, COSY, and ESI-MS. DOSY was utilized to investigate the dimensions of the metallocycles that were compared to the values obtained from the energy minimized molecular modeling. The photophysical properties of these macrocycles showed strong fluorescence suggesting their potential use in LED. The formation of novel cyclic complexes including trimer and heteroleptic tetramers was achieved. The UV-Vis absorption and emission spectra of these materials were studied, and their chemical structures were illucidated via a combination of spectroscopic techniques including 1H NMR, ESI-MS, and MALDI-TOF-MS. Molecular modeling simulation of these nanosized complexes revealed cavities that can be used for host-guest chemistry.
Download or read book The Synthesis and Structural Characterisation of Metallosupramolecular Complexes Based on Neutral Polydentate N donor Ligands written by Thomas Riis-Johannessen and published by . This book was released on 2006 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Zinc Based Organometallic Complexes for the Polymerization of Polar Monomers and Synthesis of Functional Cyclic Di ester Monomers written by Dina Shpasser and published by . This book was released on 2004 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Metallo Supramolecular Polymers written by Masayoshi Higuchi and published by Springer Nature. This book was released on 2019-11-12 with total page 89 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book introduces the synthesis, electrochemical and photochemical properties, and device applications of metallo-supramolecular polymers, new kinds of polymers synthesized by the complexation of metal ions and organic ditopic ligands. Their electrochemical and photochemical properties are also interesting and much different from conventional organic polymers. The properties come from the electronic intra-chain interaction between the metal ions and the ligands in the polymer chain. In this book, for example, the electrochromism that the Fe(II)-based metallo-supramolecular polymer exhibits is described: the blue color of the polymer film disappears by the electrochemical oxidation of Fe(II) ions to Fe(III) and the colorless film becomes blue again by the electrochemical reduction of Fe(III) to Fe(II). The electrochromism is explained by the disappearance/appearance of the metal-to-ligand charge transfer absorption. The electrochromic properties are applicable to display devices such as electronic paper and smart windows.
