Download or read book Development of Synthetic Strategies Towards Multiporphyrin Arrays written by Aoife Ryan and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Synthetic Strategies Towards Covalently Linked Multiporphyrin Arrays written by Amy Rachel Mulholland and published by . This book was released on 2012 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis explores new synthetic methodology for the construction of multiporphyrin arrays. The formation of new carbon-carbon bonds is a unifying theme in all of the syntheses presented as part of this work. Suzuki cross-coupling chemistry and olefin metathesis were explored in the context of synthetic porphyrin chemistry leading to large, multichromophoric systems. Subsequent analysis of the host-guest chemistry of these systems gave insight into cooperative processes and the association kinetics in supramolecular complexes held together by metal-ligand and [pi]-[pi] interactions. Initial work focused on template-directed strategies for the synthesis of cyclic porphyrin arrays. The unusually high affinity of fullerenes for porphyrins inspired the application of C60and C70 to the templated synthesis of two different types of cyclic porphyrin trimer. Olefinmetathesis was selected as the method of reversibly linking the porphyrinic monomers during synthesis, resulting in a product distribution that is largely under thermodynamic control. The fullerene is also believed to have a secondary, kinetic role in the stabilisation of a 3-porphyrintransition state prior to covalent linkage. Varying the solvent composition during the synthesis of the hexa-linked trimer showed that the product yield varied quadratically with the percentage of toluene in dichloromethane/toluene mixtures. This result illustrated the complex and synergistic relationship between solvation, desolvation and cooperative processes in a templated synthesis driven by [pi]-[pi] interactions. Solvent-related differences in the initiation rate of Grubbs' catalyst were also considered in light of this result. The second component of this thesis describes the design of an artificial light harvesting device based on a supramolecular cucurbit[7] uril-methyl viologen inclusion complex with porphyrin units appended to the periphery. Although the synthetic chemistry leading to a covalently-linked cucurbituril-porphyrin conjugate was unsuccessful, several broadly applicable porphyrinic building blocks were developed as part of this work. Recognition processes in multivalent metalloporphyrin hosts were studied using a binding motif based on a biphenyl-linked bisporphyrin. The synthesis of these porphyrin dimers and dyads proceeded via a stepwise approach in which sequential amide and Suzuki couplings gaverise to both homo- and heteroporphyrin dyads in reasonable yields and without the need for extensive purification. The complexation of the Zn(II)/Zn(II) dimer with 4,4'-dipyridyl, 1,2-bis(4-pyridyl)ethane and DABCO was examined, revealing that a 'cyclic' 1:1 complex forms initially and is eventually degraded to the 1:2 complex in the presence of excess ligand. The calculated microscopic binding constants were self-consistent with the Ka values derived from titration of this host with the monotopic ligands pyridine, 4-methylpyridine and quinuclidine. Secondly, the elaboration of this core binding motif with a derivative of C60 was achieved using similar synthetic methodology. Intended as a tunable system where the efficiency of photo induced electron transfer could be studied as a function of donor-acceptor orientation, the host-guest chemistry of this complex was also explored. The K1 values for the formation of a supramolecular tetrad with the bipyridyl ligands were 30-40% lower cf. the model zinc(II) dimer, reflecting competition from the C60 moiety. The binding stoichiometry of the bisporphyrin-C60 triad-DABCO complex was determined by a combined global non-linear regression analysis of UV-vis and fluorescence spectroscopic titration data, revealing the unusual self-assembly of a 2:2 complex.
Download or read book Multiporphyrin Arrays written by Dongho Kim and published by CRC Press. This book was released on 2012-01-12 with total page 830 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the fundamentals and applications of multiporphyrin arrays ranging from basic spectroscopic features to a wide range of promising applications such as molecular wires, switches, sensors, artificial photosynthetic devices, and dye-sensitized solar cells based on a variety of multiporphyrin architectures using covalent and/or noncovalent molecular assemblies. Particularly, it focuses on energy and electron transfer processes occurring in multiporphyrin arrays in various environments such as single-molecule level, composite materials, LB films, and solid surface to provide better understanding of photofunctional molecular architectures.
Download or read book Handbook Of Porphyrin Science With Applications To Chemistry Physics Materials Science Engineering Biology And Medicine Volumes 1 5 written by Karl M Kadish and published by World Scientific. This book was released on 2010-03-16 with total page 2438 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the first set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives demonstrated new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique Handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors of the chaptersThis Handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.
Download or read book Multiporphyrin Arrays written by Dongho Kim and published by CRC Press. This book was released on 2012-01-12 with total page 817 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive review of the fundamentals and applications of multiporphyrin arrays ranging from basic spectroscopic features to a wide range of promising applications such as molecular wires, switches, sensors, artificial photosynthetic devices, and dye-sensitized solar cells based on a variety of multiporphyrin architectures u
Download or read book Handbook of Polyelectrolytes and Their Applications Polyelectrolytes their characterization and polyelectrolye solutions written by Sukant K. Tripathy and published by . This book was released on 2002 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ladder Polymers written by Yan Xia and published by John Wiley & Sons. This book was released on 2023-05-30 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ladder Polymers An essential reference covering the latest research on ladder polymers Ladder polymers are a unique macromolecular architecture, consisting of a continuous strand of fused rings in their backbones. Such distinctive structures lead to a range of interesting thermal, optical, and electronic properties and self-assembly behaviors, which have been explored for various applications. The book Ladder Polymers: Synthesis, Properties, Applications, and Perspectives presents a collection of diverse topics in ladder polymers consisting of historical overview, state-of-the-art research and development, and potential future directions, written by leading researchers in the related fields. The topics include: Conjugated ladder polymers and graphene nanoribbons Nonconjugated microporous ladder polymers or polymers of intrinsic microporosity Covalent double-stranded polymers Supramolecular double-helical polymers and oligomers Two dimensional polymers This book is a one-stop resource on all the critical research developments in the subject of ladder polymers for broad readership including organic, polymer, and physical chemists, materials scientists and engineers, and chemical engineers.
Download or read book The Porphyrin Handbook Volume 1 written by Karl Kadish and published by Elsevier. This book was released on 2000 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists in such fields as mathematics, physics, chemistry, biochemistry, biology, and medicine are currently involved in investigations of porphyrins and their numerous analogues and derivatives. Porphyrins are being used as platforms for the study of theoretical principles, as catalysts, as drugs, as electronic devices, and as spectroscopic probes in biology and medicine. The need for an up-to-date and authoritative treatise on the porphyrin system has met with universal acclaim amongst scientists and investigators.
Download or read book The Porphyrin Handbook written by Karl Kadish and published by Academic Press. This book was released on 1999-10-29 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: Scientists in such fields as mathematics, physics, chemistry, biochemistry, biology, and medicine are currently involved in investigations of porphyrins and their numerous analogues and derivatives. Porphyrins are being used as platforms for the study of theoretical principles, as catalysts, as drugs, as electronic devices, and as spectroscopic probes in biology and medicine. The need for an up-to-date and authoritative treatise on the porphyrin system has met with universal acclaim amongst scientists and investigators. The Porphyrin Handbook represents a timely publication dealing with the recent chemistry, physics, biology, and medicine of porphyrins and related macrocycles. This publication will be a major reference source in this field for the new millennium. Editors are world-renowned experts in their particular fields of physical chemistry, bio-organic chemistry, and organometallic chemistry Consists of several thousand pages of articles written by internationally recognized experts Biological relevance of porphyrins is linked to their chemical, physical, and structural features Clear, concise, and uniform presentation with many hundreds of figures, tables and structural formulae Of interest to theorists, physicists, chemists, biochemists, biologists, and medical scientists
Download or read book Polymers and Light written by Wolfram Schnabel and published by John Wiley & Sons. This book was released on 2007-06-27 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This first book to focus on the important and topical effect of light on polymeric materials reflects the multidisciplinary nature of the topic, building a bridge between polymer chemistry and physics, photochemistry and photophysics, and materials science. Written by one experienced author, a consistent approach is maintained throughout, covering such applications as nonlinear optical materials, core materials for optical waveguides, photoresists in the production of computer chips, photoswitches and optical memories. Advanced reading for polymer, physical and organic chemists, manufacturers of optoelectronic devices, chemical engineers, and materials scientists.
Download or read book Index to Theses with Abstracts Accepted for Higher Degrees by the Universities of Great Britain and Ireland and the Council for National Academic Awards written by and published by . This book was released on 2001 with total page 842 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theses on any subject submitted by the academic libraries in the UK and Ireland.
Download or read book Handbook Of Porphyrin Science With Applications To Chemistry Physics Materials Science Engineering Biology And Medicine Volumes 21 25 written by Roger Guilard and published by World Scientific. This book was released on 2012-06-25 with total page 2068 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the fifth set of Handbook of Porphyrin Science.Porphyrins, phthalocyanines and their numerous analogues and derivatives are materials of tremendous importance in chemistry, materials science, physics, biology and medicine. They are the red color in blood (heme) and the green in leaves (chlorophyll); they are also excellent ligands that can coordinate with almost every metal in the Periodic Table. Grounded in natural systems, porphyrins are incredibly versatile and can be modified in many ways; each new modification yields derivatives, demonstrating new chemistry, physics and biology, with a vast array of medicinal and technical applications.As porphyrins are currently employed as platforms for study of theoretical principles and applications in a wide variety of fields, the Handbook of Porphyrin Science represents a timely ongoing series dealing in detail with the synthesis, chemistry, physicochemical and medical properties and applications of polypyrrole macrocycles. Professors Karl Kadish, Kevin Smith and Roger Guilard are internationally recognized experts in the research field of porphyrins, each having his own separate area of expertise in the field. Between them, they have published over 1500 peer-reviewed papers and edited more than three dozen books on diverse topics of porphyrins and phthalocyanines. In assembling the new volumes of this unique handbook, they have selected and attracted the very best scientists in each sub-discipline as contributing authors.This handbook will prove to be a modern authoritative treatise on the subject as it is a collection of up-to-date works by world-renowned experts in the field. Complete with hundreds of figures, tables and structural formulas, and thousands of literature citations, all researchers and graduate students in this field will find the Handbook of Porphyrin Science an essential, major reference source for many years to come.
Download or read book European Journal of Inorganic Chemistry written by and published by . This book was released on 2003 with total page 758 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Multilayer Thin Films written by Gero Decher and published by John Wiley & Sons. This book was released on 2012-06-11 with total page 1157 pages. Available in PDF, EPUB and Kindle. Book excerpt: This second, comprehensive edition of the pioneering book in this fi eld has been completely revised and extended, now stretching to two volumes. The result is a comprehensive summary of layer-by-layer assembled, truly hybrid nanomaterials and thin fi lms, covering organic, inorganic, colloidal, macromolecular, and biological components, as well as the assembly of nanoscale fi lms derived from them on surfaces. These two volumes are essential for anyone working in the field, as well as scientists and researchers active in materials development, who needs the key knowledge provided herein for linking the field of molecular self-assembly with the bio- and materials sciences.
Download or read book American Doctoral Dissertations written by and published by . This book was released on 2000 with total page 816 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Femtochemistry and Femtobiology written by Abderrazzak Douhal and published by World Scientific. This book was released on 2002 with total page 854 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains important contributions from top international scientists on the-state-of-the-art of femtochemistry and femtobiology at the beginning of the new millennium. It consists of reviews and papers on ultrafast dynamics in molecular science.The coverage of topics highlights several important features of molecular science from the viewpoint of structure (space domain) and dynamics (time domain). First of all, the book presents the latest developments, such as experimental techniques for understanding ultrafast processes in gas, condensed and complex systems, including biological molecules, surfaces and nanostructures. At the same time it stresses the different ways to control the rates and pathways of reactive events in chemistry and biology. Particular emphasis is given to biological processes as an area where femtodynamics is becoming very useful for resolving the structural dynamics from techniques such as electron diffraction, and X-ray and IR spectroscopy. Finally, the latest developments in quantum control (in both theory and experiment) and the experimental pulse-shaping techniques are described.
