Download or read book Exploring the Chemistry of Cyclopentadienyl cobalt cyclobutadiene CpCoCb Complexes and Synthesis of Side chain CpCoCb Polymers written by Preeti Chadha and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Synthetic metallopolymers have acquired ample attention recently due to their potential applications as precursors to functional soft materials. Organometallic polymers combine the best of both organic and inorganic polymers. Polyferrocenes comprise the major portion of organometallic polymers. Therefore, quest for new monomeric precursors to organometallic polymers has expediated. One efficient method for obtaining main-chain metallopolymers is by the ring opening polymerization (ROP) of strained cyclic metallacylophanes(MCPs). Organometallic polymers containing cyclopentadienyl-cobalt-cyclobutadiene (CpCoCb) have been targeted since early 1990's due to their isoelectronic nature (cf. ferrocene) with three major groups working in this area. The early CpCoCb containing polymers were prepared by alkyne dimerization of a bis-alkyne at the Co(I) centre, which did not provide good control over the molecular weights of the polymers generated. In search of novel Co(I) monomers for ROP, synthesis of sila- and germa- [2]cobaltoarenophanes was undertaken via. unprecedented direct dilthiation of (CpCoCb*) (Cb* = tetramethylcyclobutadiene) and subsequent treatment with the main group dihalides. However, attempts to ring open the CH2-SiMe2 bridged [2]cobaltoarenophanes were unsuccessful, which was attributed to the lower degree of strain in these molecules. An alternative route to [1]cobaltoarenophanes was proposed taking advantage of alkyne dimerization at a substituted CpCo(I) complex featuring a coordinated pendent alkyne. In this regard, alkyne-appended cyclopentadienyl ligands were developed and their utility was explored in reaction with early and late transition metals such as Ti, Fe, Co and Ni. This resulted in the formation of bis-alkynyl metallocenes of Ti and Co and half sandwich Ni complexes featuring a pendent alkyne. Synthesis of side chain cobalt(I) polymers demonstrating the CpCoCb framework has also been explored, using pre-functionalized Cp ligands incorporating a polymerizable vinyl moiety.
Download or read book Exploring the Chemistry Of 5 Cyclopentadienyl cobalt 4 Cyclobutadiene Containing Polymers Synthesis Properties and Self assembly written by Mahboubeh Hadadpour and published by . This book was released on 2015 with total page 370 pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal containing polymers (metallopolymers) bring together the synthetic efficiency and versatility of conventional organic polymers with unique redox, responsive, and catalytic properties of inorganic metals. Over the last decade, metallopolymers have gained increased attention because of their unique physical and chemical properties that arise from the incorporation of metal centers into a polymer. Since the first report on a metallocene-based metallopolymer in 1955, there has been growing interest in this class of material. Ferrocene-based metallopolymers represent the vast majority of metallocene containing polymers in the literature. In 1992, the Manners Group established a major milestone in the field of metallopolymers by reporting the ring opening polymerization (ROP) of the strained [1]silaferrocenophane to synthesize polyferrocenylsilane (PFS). The novelty of PFS has attracted attention to incorporate other metallocenes into polymer chains. In comparison to well-studied ferrocene containing polymers, cobaltocene have received far less attention due to the difficulties in preparing its derivatives. In fact, only a few key contributions on this subject have been reported. Cobaltocene with 19 electrons is not stable and is readily oxidized to a cationic 18 electron cobaltocenium. The Tang Group has developed a synthetic methodology to synthesize highly pure cobaltocenium derivatives and incorporated them into well-defined polymers. Alternatively, the Ragogna Group reported the first neutral side-chain?5- cyclopentadienyl-cobalt-?4-cyclobutadiene (CpCoCb) functionalized metallopolymer. This mixed sandwich metallocene is an 18 electron complex, electronically neutral and isoelectronic to ferrocene and cobaltocenium. In this dissertation, the synthesis of welldefined side-chain functionalized CpCoCb containing homo- and block metallopolymers via reversible addition fragmentation transfer (RAFT) polymerization is detailed. Development of a controlled polymerization method to obtain well-defined high molecular weight CpCoCb containing metallopolymers is discussed. Several block copolymers were prepared via sequential RAFT polymerization. Synthesis, characterization, solution and solid-state self-assembly of the metal containing block copolymers is discussed in detail. These materials are used as ink in soft lithography to transfer patterns using a polydimethylsiloxane (PDMS) stamp. Synthesis of a series of CpCoCb monomers where the Cb ring is decorated with different substituents such as ferrocene and thiophene is reported. These highly metalized monomers are used to make metal rich materials with tunable metal content.
Download or read book Exploring Cyclopentadienyl Cobalt Cyclobutadiene Complexes written by Preeti Chadha and published by . This book was released on 2012 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Synthesis and Rearrangements of Cyclopentadienylcobalt Diene Complexes written by Joseph Anthony King and published by . This book was released on 1983 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of Cyclopentadienyl Cobalt Complexes written by Ian R. Beaumont and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Cyclopentadienyl Cobalt Dicarbonyl Induced Cyclizations of Diyne enes in Synthesis of Cyclohexadiene Cobalt Complexes Applications Towards the Synthesis of Estrone written by Ethan Dane Sternberg and published by . This book was released on 1982 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis of Novel Cyclopentadienyl Cobalt I complexes and Their Application in 2 2 2 Cycloaddition Reactions written by Indre Thiel and published by . This book was released on 2013 with total page 151 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Reactivity of 4 Cyclopentadienone 5 Cyclopentadienyl Cobalt Complexes written by Thomas C. Gartenmann and published by . This book was released on 1983 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthesis and Reactivity of pi 4 Cyclopentadienone pi 5 Cyclopentadienyl Cobalt Complexes written by Thomas C. Gartenmann and published by . This book was released on 1983 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preparations of Cyclobutadiene Substituted CpCoCb Diphosphines and Applications of Their Ligated Palladium Complexes in Coupling Reactions Optical physical and Bio activity Studies of Coumarin Derivatives written by and published by . This book was released on 2009 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Chemistry of N4 cyclobutadiene Cobalt Derivatives and Related Complexes written by Paul O'Donohue and published by . This book was released on 2007 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Sulphur Chemistry of Cyclopentadienyl Cobalt Complexes written by John Fortune and published by . This book was released on 1981 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ferrocenes written by Petr Stepnicka and published by John Wiley & Sons. This book was released on 2008-04-15 with total page 670 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ferrocene—the prototypical metallocene—is a fascinating molecule. Even though it was first discovered over fifty years ago, research into ferrocene-containing compounds continues apace, largely stimulated by their successful applications in catalysis, materials science and bioorganometallic chemistry. Ferrocene derivatives are now recognised as useful starting materials for the preparation of new organometallic complexes and functional materials, efficient catalyst components, as well as redox-active modifiers to biomolecules. Ferrocenes: Ligands, Materials and Biomolecules provides the reader with a background overview and describes recent advances in the development and application of ferrocene compounds, including: synthesis and catalytic utilisation of chiral and non-chiral ferrocene ligands ferrocene-based sensors electrooptical materials ferrocene polymers liquid-crystalline materials crystal engineering with ferrocene compounds the bioorganometallic chemistry of ferrocene Ferrocenes: Ligands, Materials and Biomolecules is an essential guide for anyone working in the fields of organometallic synthesis and catalysis, materials science and bioorganometallic chemistry.
Download or read book Palladacycles written by Jairton Dupont and published by John Wiley & Sons. This book was released on 2008-10-13 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: From synthesis to applications in catalysis, material science and biology this much-needed book is the first to comprehensively present everything you need to know about palladacycles. Renowned international authors guarantee high-quality content, making this a must-have for everyone working in the field.
Download or read book Self healing Materials written by Swapan Kumar Ghosh and published by John Wiley & Sons. This book was released on 2009-08-04 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book covers self-healing concepts for all important material classes and their applications: polymers, ceramics, non-metallic and metallic coatings, alloys, nanocomposites, concretes and cements, as well as ionomers. Beginning with the inspiration from biological self-healing, its mimickry and conceptual transfer into approaches for the self-repair of artificially created materials, this book explains the strategies and mechanisms for the readers' basic understanding, then covers the different material classes and suitable self-healing concepts, giving examples for their application in practical situations. As the first book in this swiftly growing research field, it is of great interest to readers from many scientific and engineering disciplines, such as physics and chemistry, civil, architectural, mechanical, electronics and aerospace engineering.
Download or read book Hydrogen Bonded Polymers written by Wolfgang Binder and published by Springer Science & Business Media. This book was released on 2007-03-16 with total page 215 pages. Available in PDF, EPUB and Kindle. Book excerpt: Control of polymeric structure is among the most important endeavours of modern macromolecular science. In particular, tailoring the positioning and strength of intermolecular forces within macromolecules by synthetic methods and thus gaining structural control over the final polymeric materials has become feasible, resulting in the field of supramolecular polymer science. Besides other intermolecular forces, hydrogen bonds are unique intermolecular forces enabling the tuning of material properties via self-assembly processes over a wide range of interactions strength ranging from several kJmol to several tens of kJmol . Central for the formation of these structures are precursor molecules of small molecular weight (usually lower than 10 000), which can assemble in solid or solution to aggregates of defined geometry.
Download or read book Structure and Rheology of Molten Polymers written by John M. Dealy and published by Carl Hanser Verlag GmbH Co KG. This book was released on 2018-02-12 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent advances in polymer science have made it possible to relate quantitatively molecular structure to rheological behavior. At the same time, new methods of synthesis and characterization allow the preparation and structural verification of samples having a range of branched polymeric structures. This book unites this knowledge to enable production of polymers with prescribed processability and end-product properties. Methods of polymer synthesis and characterization are described, starting from fundamentals. The foundations of linear viscoelasticity are introduced, and then the linear behavior of entangled polymers is described in detail. This is followed by a discussion of the molecular modeling of linear behavior. Tube models for both linear and branched polymers are presented. The final two chapters deal with nonlinear rheological behavior and tube models to describe nonlinearity. In this second edition, each chapter has been significantly rewritten to account for recent advances in experimental methods and theoretical modeling. It includes new and updated material on developments in polymer synthesis and characterization, computational algorithms for linear and nonlinear rheology prediction, measurement of nonlinear viscoelasticity, entanglement detection algorithms in molecular dynamics, nonlinear constitutive equations, and instabilities. Contents: - Structure of Polymers - Polymerization Reactions and Processes - Linear Viscoelasticity - Fundamentals - Linear Viscoelasticity - Behavior of Molten Polymers - Tube Models for Linear Polymers - Fundamentals - Tube Models for Linear Polymers - Advanced Topics - Determination of Molecular Weight Distribution Using Rheology - Tube Models for Branched Polymers - Nonlinear Viscoelasticity - Tube Models for Nonlinear Viscoelasticity of Linear and Branched Polymers
