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Synthesis Of Ring Opening Metathesis Polymerization Diblock Copolymers For Electrical And Separations Applications
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Book Synopsis Synthesis of Ring Opening Metathesis Polymerization Diblock Copolymers for Electrical and Separations Applications by : Randall Scott Saunders
Download or read book Synthesis of Ring Opening Metathesis Polymerization Diblock Copolymers for Electrical and Separations Applications written by Randall Scott Saunders and published by . This book was released on 1992 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ring Opening Metathesis Polymerisation and Related Chemistry by : Ezat Khosravi
Download or read book Ring Opening Metathesis Polymerisation and Related Chemistry written by Ezat Khosravi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the last ASI in Turkey in Sept. 1995, the olefin metathesis has made remarkable strong developments with an incredible speed in various directions. New catalyst systems have been developed which have resulted in the synthesis of novel materials. Other fascinating developments have been the new catalysts for stereoselective metathesis and catalysts with considerable functional group tolerance. These new catalysts in addition to Ring Opening Metathesis Polymerisation (ROMP) and Acyclic Diene Metathesis (ADMET) are now powerful tools for Ring Closing Metathesis (RCM) and have found many applications in the synthesis of natural products. A lot of information has been established about all aspects of the olefin metathesis and there is a vast literature concerning the process, covering the initiators, mechanistic features and applications of this reaction in organic and polymer synthesis. The NATO ASI on rd th ROMP and Related Chemistry took place in Polanica-Zdroj, Poland during 3 to 15 Sept. 2000, to highlight the developments in this area and to discuss the prospects and visions for the year 2000 and beyond. The aims of the ASI were: to provide a platform for dissemination of knowledge; to promote communication between people who have a serious interest in this field of chemistry; to help establishing international scientific contacts and to provide an opportunity for the scientists with an appropriate scientific background to learn of recent developments in this field of science. There were 15 lecturers and 67 participants in this NATO ASI.
Book Synopsis Synthesis and Applications of Ring Opening Metathesis Polymerization Based Functional Block Copolymers by : Sanchita Biswas
Download or read book Synthesis and Applications of Ring Opening Metathesis Polymerization Based Functional Block Copolymers written by Sanchita Biswas and published by . This book was released on 2010 with total page 172 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ring opening metathesis polymerization (ROMP) is established as one of the efficient controlled living polymerization methods which have various applications in polymer science and technology fields. The research presented in this dissertation addresses several applications of multifunctional well-defined norbornene-based block copolymers synthesized by ROMP using ruthenium-based Grubbs catalysts. These novel block copolymers were applied to stabilize maghemite nanoparticles, creating the superparamagnetic polymeric nanocomposites. The J-aggregation properties of the porphyrin dyes were improved via self-assembly with a customized norbornene polymer. Novel multimodal copolymer probes were synthesized for two-photon fluorescence integrin-targeted bioimaging. In Chapter 1 a brief overview of ROMP along with ruthenium metal catalysts and selected applications of the polymers related to this research is presented. Superparamagnetic maghemite nanoparticles are important in biotechnology fields, such as enhanced magnetic resonance imaging (MRI), magnetically controlled drug delivery, and biomimetics. However, cluster formation and eventual loss of nano-dimensions is a major obstacle for these materials. Chapter 2 presents a solution to this problem through nanoparticles stabiulized in a polymer matrix. The synthesis and chracterization of novel diblock copolymers, consisting of epoxy pendant anchoring groups to chelate maghemite nanoparticles and steric stabilizing groups, as well as generation of nanocomposites and their characterization, including surface morphologies and magnetic properties, is discussed in Chapter 2. In Chapter 3, further improvement of the nanocomposites by ligand modification and the synthesis of pyrazole-templated diblock copolymers and their impact to stabilize the maghemite nanocomposite are presented. Additionally, the organic soluble magnetic nanocomposites with high magnetizations were encapsulated in an amphiphilic copolymer and dispersed in water to assess their water stability by TEM. To gain a preliminary measure of biocopatibility of the micelle-encapsulated polymeric magnetic nanocomposites, cell-viability was determined. In Chapter 4, aggregation behaviors of two porphyrin-based dyes were investigated. A new amphiphilic homopolymer containing secondary amine moieties was synthesized and characterized. In low pH, the polymer became water soluble and initiated the stable J-aggregation of the porphyrin. Spectroscopic data supported the aggregation behavior. Two photon fluorescence microscopy (2PFM) has become a powerful technique in bioimaging for non-invasive imaging and potential diagnosis and treatment of a number of diseases via excitation in the near-infrared (NIR) region. The fluorescence emission upon two-photon absorption (2PA) is quadratically dependent with the intensity of excitation light (compared to the linear dependence in the case of one-photon absoprtion), offering several advantages for biological applications over the conventional one-photon absorption (1PA) due to the high 3D spatial resolution that is confined near the focal point along with less photodamage and interference from the biological tissues at longer wavelength (~700-900 nm). Hence, efficient 2PA absorbing fluorophores conjugated with specific targeting moieties provides an even better bioimaging probe to diagnose desired cellular processes or areas of interest The [alpha subscript v beta subscript 3] integrin adhesive protein plays a significant role in regulating angiogenesis and is over-expressed in uncontrolled neovascularization during tumor growth, invasion, and metastasis. Cyclic-RGD peptides are well-known antagonists of [alpha subscript v beta subscript 3] integrin which suppress the angiogenesis process, thus preventing tumor growth. In Chapter 5 the synthesis, photophysical studies and bioimaging is reported for a versatile norbornene-based block copolymer multifunctional scaffold containing biocompatible (PEG), two-photon fluorescent (fluorenyl), and targeting (cyclic RGD peptide) moieties. This water-soluble polymeric multi scaffold probe with negligible cytotoxicity exhibited much stronger fluorescence and high localization in U87MG cells (that overexpress integrin) compared to control MCF7 cells. The norbornene-based polymers and copolymers have quite remarkable versatility for the creation of advanced functional magnetic, photonic, and biophotonic materials.
Book Synopsis Synthesis of Sequence-controlled Copolymers Via Ring-opening Metathesis Polymerization of Norbornene Derivatives by : Dennis Barther
Download or read book Synthesis of Sequence-controlled Copolymers Via Ring-opening Metathesis Polymerization of Norbornene Derivatives written by Dennis Barther and published by . This book was released on 2022* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Advances in Ring Opening (Metathesis) Polymerization by :
Download or read book Advances in Ring Opening (Metathesis) Polymerization written by and published by Wiley-VCH. This book was released on 2000-09-12 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume of Macromolecular Symposia contains contributions presented at the RO(M)P'99 International Symposium in Mons, Belgium. At this meeting, over one hundred chemists, physico-chemists, chemical engineers from the world of academia and industry, as well as students, discussed recent developments in mechanisms and kinetics in RO(M)P, synthesis and characterization of new macromolecular architectures, and new materials and applications via RO(M)P.
Book Synopsis Synthesis of Catalysts for Ring Opening Metathesis Polymerization by : Martha Dolan Morton
Download or read book Synthesis of Catalysts for Ring Opening Metathesis Polymerization written by Martha Dolan Morton and published by . This book was released on 1993 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ring opening metathesis polymerization-derived block copolymers bearing chelating ligands: synthesis, metal immobilization and use in hydroformylation under micellar conditions by :
Download or read book Ring opening metathesis polymerization-derived block copolymers bearing chelating ligands: synthesis, metal immobilization and use in hydroformylation under micellar conditions written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis 1, Transition Metal Mediated Ring Opening Metathesis Polymerization by : James Robert Walker
Download or read book 1, Transition Metal Mediated Ring Opening Metathesis Polymerization written by James Robert Walker and published by . This book was released on 1993 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Conjugated Block Copolymers Composed of Dithienyl-Cyclopentadithiophene Via Ring-Opening Metathesis Polymerization by : Yun-Yung Lu
Download or read book Synthesis of Conjugated Block Copolymers Composed of Dithienyl-Cyclopentadithiophene Via Ring-Opening Metathesis Polymerization written by Yun-Yung Lu and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Metal-free Photoredox-mediated Ring Opening Metathesis Polymerization by : Laura M. M. Pascual
Download or read book Metal-free Photoredox-mediated Ring Opening Metathesis Polymerization written by Laura M. M. Pascual and published by . This book was released on 2018 with total page 133 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ring-opening Metathesis Polymerization of Cyclopropenes and Ladderenes by : Jessica Kalay Su
Download or read book Ring-opening Metathesis Polymerization of Cyclopropenes and Ladderenes written by Jessica Kalay Su and published by . This book was released on 2020 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The importance of polymer microstructure is manifested in nature, where the precisely regulated monomer sequence in biomacromolecules enables their controlled folding and assembly to afford vital biological functions. In the pursuit of man-made materials with sophisticated properties, the field of polymer chemistry has developed rapidly to enable the synthesis of polymers with controlled microstructures. Specifically, living polymerization techniques, such as ring-opening metathesis polymerization (ROMP), enable excellent control over polymer molecular weight, composition, and architecture. ROMP is driven primarily by the release of ring strain in cyclic olefin monomers, but surprisingly few studies have been performed on the ROMP of cyclopropenes (CPEs), the most strained monocyclic olefins. In 2015, our group discovered that a class of 1,1-disubstituted CPE undergoes selective single addition to Grubbs third generation catalyst. Monomers which undergo single addition are extremely rare for chain-growth polymerizations and are particularly useful for manipulating the monomer sequence in a polymer. As such, we focused our research efforts on discovering other CPEs that can undergo single addition and uncovering the mechanism and role of their substituents. We have synthesized a library of CPEs with various disubstitution patterns and substituents and systematically investigated their reactivity with Grubbs catalyst. We have found that 1,1-disubstitution of CPE is crucial for both preserving the stability of the propagating chain end and tuning the metathesis reactivity from living polymerization to single addition. The distinct reactivities stemmed from differences in sterics and/or chelation at the Ru alkylidene from C1 substituents after a single CPE ring-opening event, affecting the barrier to propagation. We have utilized the single addition reactivity of CPEs to synthesize alternating copolymers with diverse side chain and backbone functionalities from alternating ROMP of CPE with low-strain cyclic olefins. Recently, we have developed a strategy to precisely place discrete functionalities and side chains via ring-opened CPEs at pre-determined locations along a living ROMP polymer chain, with control over the location and number incorporated. This advance in polymer chemistry opens many exciting opportunities to manipulate the functionalities along well-controlled polymer chains for understanding the effects of their placement and sequence on polymer behaviors, controlling polymer folding/assembly, as well as synthesizing polymers with more complex nonlinear architectures with precision. Our group also recently reported a unique polymechanophore system, polyladderene, that undergoes force-triggered rearrangement into semi-conducting, insoluble polyacetylene. A notable feature in the design was the terminal strained cyclobutene on ladderene that allowed rapid ROMP. We have developed synthetic procedures to prepare triblock copolymers containing mechanically active polyladderene, since block copolymers can self-assemble in solution and bulk and facilitate incorporation of polyladderene with common polymers to impart the dramatic stress-response of polyladderene to diverse materials.
Book Synopsis Synthesis and Self-assembly of Conjugated and Biomimetic Polymers and Block Copolymers Via Ring-opening Metathesis Polymerization by : Hassan Said Bazzi
Download or read book Synthesis and Self-assembly of Conjugated and Biomimetic Polymers and Block Copolymers Via Ring-opening Metathesis Polymerization written by Hassan Said Bazzi and published by . This book was released on 2003 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research in Materials written by and published by . This book was released on 1993 with total page 612 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis, Isomerization, Kinetics, and Ring-opening Metathesis Polymerization of 1,2,5,6-tetrasilacycloocta-3,7-dienes by : Lei Zhang
Download or read book Synthesis, Isomerization, Kinetics, and Ring-opening Metathesis Polymerization of 1,2,5,6-tetrasilacycloocta-3,7-dienes written by Lei Zhang and published by . This book was released on 1999 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ring-opening Polymerisation by : N. Spassky
Download or read book Ring-opening Polymerisation written by N. Spassky and published by iSmithers Rapra Publishing. This book was released on 1995 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: The general features of ring-opening polymerisation, for example the dependence of polymerisability upon ring-strain, the significance of ring-chain equilibria, and the potential for formation of cyclic oligomers are outlined. An additional indexed section containing several hundred abstracts from the Rapra Polymer Library database provides useful references for further reading.
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2001 with total page 776 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of Novel Polymeric Materials by Ring-opening Metathesis Polymerization by : Edwina Elizabeth Law
Download or read book Synthesis of Novel Polymeric Materials by Ring-opening Metathesis Polymerization written by Edwina Elizabeth Law and published by . This book was released on 1996 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
