Download or read book Synthesis and Modifications of Porphyrinoids written by Roberto Paolesse and published by Springer. This book was released on 2014-07-08 with total page 301 pages. Available in PDF, EPUB and Kindle. Book excerpt: The McMurry Reaction in Porphyrinoid Chemistry, by Kevin M. Smith Meso-tetraarylporphyrins: synthetic strategies and reactivity profiles based on nitro/amino substituents, by Maria da Graça Neves Functionalization of corroles, by José Cavaleiro Degradation pathways for porphyrinoids, by Jacek Wojaczynski Synthetic routes to porphyrinoids, by Sara Nardis Recent developments of non covalent porphyrin assemblies, by Donato Monti
Download or read book The Porphyrins V1 written by David Dolphin and published by Elsevier. This book was released on 2012-12-02 with total page 665 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Porphyrins, Volume I: Structure and Synthesis, Part Ais the first in a series of seven volumes and covers topics like nomenclature, purification, and structural determination of porphyrins, metalloporphyrins, and other related compounds. This volume serves to be a critical review of the topics covered and presents a complete and comprehensible discussion on the chemistry and biochemistry of porphyrins. The chapters in the text tackle the history and geochemistry of porphyrins and related systems. Also covered and discussed in the chapters is the synthesis of porphyrins from mono-, di-, and tetrapyrrolic intermediates. The isolation and modification of porphyrins from natural sources are also discussed. Other related compounds are also included, such as metallo-, aza-, and N-methylporphyrins, and their synthesis and properties. This book is a good introduction and reference for students studying in the fields of chemistry and biochemistry.
Download or read book Synthesis Reactivity and Modification of Novel Meso substituted Porphyrins written by Katja Dahms and published by . This book was released on 2008 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Porphyrins V2 written by David Dolphin and published by Elsevier. This book was released on 2012-12-02 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Porphyrins, Volume II: Structure and Synthesis, Part B is devoted to the structure and synthesis of porphyrins, their precursors, catabolic derivatives, and related systems. The book also covers nomenclature, history, geochemistry, purification, and structural determination of porphyrins, metalloporphyrins, and mono- and polypyrrolic compounds. This volume is organized into 10 chapters and begins with an overview of hydroporphyrins, paying particular attention to their synthesis and stereochemistry as well as reactivity, spectroscopy, and analogues. This book then discusses the synthesis, properties, thermodynamic stability, and evolution of porphyrinogens. The following chapters focus on porphyrins reversibly modified at the periphery by oxidation (oxophlorins) and by irreversible reactions at the periphery. The synthesis of photoexcited porphyrins, metalloporphyrins, and chlorophylls is covered. In addition, chapters on linear polypyrroles, their metal complexes, and macrocycles other than porphyrins are included. This book should be useful to inorganic, organic, physical, and biochemists interested in porphyrin chemistry and biochemistry.
Download or read book Expanding the Synthesis and Applications of Morpholine based Pyrrole Modified Porphyrins written by Meenakshi Sharma and published by . This book was released on 2018 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis proposes to refine and extend the 'porphyrin breaking and mending' methodology, to modify known and novel pyrrole-modified porphyrins (PMPs), to evaluate their (photo)physical properties in theory and experiment, and to explore - alone and in collaboration with specialty groups - their applications. The investigations were carried out such that the steric (e.g., ring-size of the non-pyrrolic heterocycle; beta-to-ortho-phenyl linkages) and electronic influences (e.g., degree of saturation of the macrocycle, nature of functional groups) of the modifications on the physical properties of the PMPs could be delineated. The reaction of beta-octaalkylporphyrins (octaethylporphyrin and etioporphyrin I) with ozone to generate chlorin-like chromophores was studied. Such a reaction was described firstly over 80 years ago but was not understood at the time. The work expands on the knowledge of converting porphyrins to porphyrinoids containing non-pyrrolic heterocycles of potential utility. We introduce novel methodologies toward the synthesis of porphyrinoids carrying beta-to-ortho-phenyl fusions and expand on the scope and limits of the chemistry and interconversion of pyrrole-modified porphyrins. The macrocycle conformation of [meso-tetraarylporphyrinato] metal complexes is metal-dependent. Furthermore, hydroporphyrins and some of their analogues are known to be more conformationally flexible than the parent porphyrins, but the extent to which this is reflected in their metal-dependent conformations was much less studied. Therefore, their conformations were determined using X-ray crystal structure diffractometry and compared against those of their free bases, as well as against the conformations of the corresponding metalloporphyrins to further define the conformational and electronic effects governing pyrrole-modified porphyrins.
Download or read book Introduction to Core Modified Porphyrinoids Smaragdyrins Expanded Porphyrinoids and Corroles written by Hemanta Kalita and published by GRIN Verlag. This book was released on 2020-04-01 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: Document from the year 2020 in the subject Chemistry - Macromolecular Chemistry, Polymer Chemistry, grade: 2, , language: English, abstract: This work gives an overview over core modified Porphyrinoids. Specifically: Smaragdyrins, Expanded Porphyrinoids and Corroles. It does so by, in two chapters, defining each of the aforementioned chemical combinations ́ synthesis and characterization, properties and respective dyads. Smaragdyrin is a pentapyrrolic 22π-electron expanded porphyrin system bearing two direct pyrrole-pyrrole bonds. This macrocycle and its core modified derivative i.e. 25-oxasmaragdyrin have received upsurge interest in recent years due to their notable optical and electrochemical properties. Corroles are aromatic tetrapyrrolic macrocycles containing one meso carbon less compared to porphyrins and have one direct pyrrole-pyrrole linkage. This class of macrocycle possesses novel spectral, electrochemical and luminescence properties that can be exploited in material applications. In this book, we have discussed the synthesis, properties and their limited coordination chemistry of expanded porphyrinoid 25-oxasmaragdyrin and core-modified corroles. Corroles, on the other hand, are tetrapyrrolic contracted porphyrins, fully conjugated 18π electron macrocyles containing three methine bridges and one direct pyrrole-pyrrole linkage.
Download or read book Porphyrin N oxidations and Beta beta bond Modifications written by Subhadeep Banerjee and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis begins with an introduction to porphyrins and chlorins, their natural and synthetic analogues, the biological roles of porphyrins, followed by the synthesis of porphyrins and their derivatization towards chlorins. The introduction also deals with the structural analysis of porphyrins and a classification of their optical spectra, followed by a brief outline of the applications of porphyrins and chlorins. Subsequently, there is a discussion on the various types of porphyrins present with substitution in the porphyrin core as well as in the periphery. The structure, synthesis and spectroscopic properties of core substituted and peripherally modified porphyrins are also discussed. A detailed description of porphyrin and chlorin N-oxides is carried out in the Results and Discussion Chapter 1, describing their synthesis, reactivity, crystal structure and a comparison of their optical spectra. A possible biological application is outlined. An exploration of the reactivity of the porphyrin α-position and synthesis of a pyrrole-ring contracted chlorin is discussed in Chapter 2. In Results and Discussion Chapter 3, the synthesis, spectroscopy and stereochemical assignment of helimeric porphyrinoids with a morpholino subunit are discussed. In Results and Discussion Chapter 4, the synthesis of trans-diolchlorins and their manipulation leading up to the synthesis of pyrrole ring homologated porphyrins is discussed.
Download or read book Metal Sites in Proteins and Models written by H.A.O. Hill and published by Springer. This book was released on 1997-09-04 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological chemistry is a major frontier of inorganic chemistry. Three special volumes devoted to Metal Sites in Proteins and Models address the questions: how unusual ("entatic") are metal sites in metalloproteins and metalloenzymes compared to those in small coordination complexes? and if they are special, how do polypeptide chains and co-factors control this? The chapters deal with iron, with metal centres acting as Lewis acids, metals in phosphate enzymes, with vanadium, and with the wide variety of transition metal ions which act as redox centres. They illustrate in particular how the combined armoury of genetics and structure determination at the molecular level are providing unprecedented new tools for molecular engineering.
Download or read book Expanded Contracted Isomeric Porphyrins written by Jonathan L. Sessler and published by Elsevier. This book was released on 1997 with total page 546 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paperback. The porphyrins are a class of naturally-occurring macrocycles and are ubiquitous in our world. As such, they have been called the Pigments of Life. This auspicious designation reflects their importance in numerous biological functions. Indeed, life as we understand it relies on the full range of biological processes that are either performed by or catalyzed by porphyrin-containing proteins. Chlorophyll-containing photosynthetic reaction centers in plants, for instance, convert light energy into chemical energy while producing oxygen along the way. It is this oxygen, evolved from photosynthesis, that is transported, stored, and reduced by heme-containing proteins in many organisms, including mammals. Not surprisingly, therefore, these molecules remain of fundamental interest to chemists and biochemists. Indeed, they continue to be intensely investigated by researchers world-wide.Inspired by the importance of the porphyrins, a new research di
Download or read book Novel Porphyrins and Their Metal Complexes written by Hanaa Mansour 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 Handbook Of Porphyrin Science With Applications To Chemistry Physics Materials Science Engineering Biology And Medicine Volumes 6 10 written by Karl M Kadish and published by World Scientific. This book was released on 2010-06-29 with total page 2807 pages. Available in PDF, EPUB and Kindle. Book excerpt: This is the second 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 The Porphyrin Handbook Volume 2 written by Karl Kadish and published by Academic Press. This book was released on 1999-10-15 with total page 456 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 Handbook of Porphyrin Science written by Karl M. Kadish and published by World Scientific Publishing Company. This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Porphyrins, phthalocyanines and their numerous analogs 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 Fundamentals of Porphyrin Chemistry written by Penelope J. Brothers and published by John Wiley & Sons. This book was released on 2022-06-20 with total page 887 pages. Available in PDF, EPUB and Kindle. Book excerpt: FUNDAMENTALS OF PORPHYRIN CHEMISTRY An indispensable and concise overview of the chemistry of porphyrins and related molecules In Fundamentals of Porphyrin Chemistry: A 21st Century Approach, a team of distinguished researchers delivers a compact and accessible introduction to the broad field of porphyrin chemistry. It discusses the basics of porphyrin synthesis and structure, as well as that of related molecules, and the current and future roles that porphyrins play in chemical transformations, materials design and synthesis, energy capture and transduction, human health, and the environment. This edited volume is a self-contained tutorial on concepts of critical importance to porphyrin chemistry and serves as the foundation for discussions about the applications of porphyrin-related compounds found in the second volume. This book contains: A thorough introduction to porphyrins, including their structure, nomenclature, naturally occurring porphyrins, synthetic porphyrins, and common families of porphyrin-related compounds Comprehensive explorations of chemical porphyrin synthesis, including how to synthesize porphyrins from simple, symmetric, and advanced ABCD-substituted porphyrins Practical discussions of the physical characteristics of porphyrins, including their structural features, electronic structure, spectroscopy, magnetism, electrochemistry, and electron transfer processes Perfect for experienced academic researchers in the field of porphyrin chemistry seeking a quick reference, Fundamentals of Porphyrin Chemistry: A 21st Century Approach is also an indispensable resource for researchers new to the field who need an overview directing them to literature in more focused areas.
Download or read book Synthesis of Unsymmetrical Core modified Porphyrins written by and published by . This book was released on 2005 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: Water-soluble core-modified porphyrins have been designed as photosensitizers for the use in Photodynamic Therapy, a cancer treatment regime introduced over 100 years ago. These photosensitizers are recognized by the substitution in the porphyrin chromophore with different chalcogens, providing longer wavelengths. Substitutions at the meso - positions of the chromophore, however, have shown to correlate to the solubility of the molecule. Dicarboxylic and monocarboxylic acid derivatives have been reported as potent photosensitizers, where the dicarboxylic acid has been furthered investigated with varying substituents located at the other meso - positions. These studies showed that the symmetrical dicarboxylic acid molecules were prone to aggregate in polar solvents, believed to lead to low cellular uptake or a false positive activity result in the tumor cells. The following chapters will discuss background work leading to the design and synthesis of unsymmetrical core-modified porphyrins as photosensitizers. The major impetus in the design of these compounds is to examine (1) whether the unsymmetrical structures would have a positive effect on the aggregation issues observed with the dicarboxylic acid derivatives, and (2) whether increasing the log P values would affect the cellular uptake significantly. The major isomer of 20(4- tert -butylphenyl)-5,10-diphenyl-15-(4-methoxy)phenyl-21,23-dithiaporphyrin was successfully isolated and identified as the cis -isomer by X-ray crystallography.
Download or read book Applications of Porphyrinoids as Functional Materials written by Heinrich Lang and published by Royal Society of Chemistry. This book was released on 2021-08-18 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gives an overview of the applications and potential applications of porphyrins and related macrocycles as smart or functional materials.
Download or read book Template Directed Synthesis and Post Synthetic Modification of Porphyrin Encapsulating Metal Organic Materials written by Zhenjie Zhang and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Metal-organic materials (MOMs) represent an emerging class of materials comprised of molecular building blocks (MBBs) linked by organic linker ligands. MOMs recently attract great attention because of their ability to exhibit permanent porosity, thereby enabling study of properties in the context of gas storage, gas separation, solid supports for sensors, catalysis and so on. Although MOMs have been studied for over 60 years, the porous nature of MOMs was not systematically and widely explored until the early 1990's. This may be one of the reasons why template-directed synthesis of MOMs remains relatively underexplored, especially when compared to other classes of porous material (e.g. zeolite and mesoporous silicates). However, the study of template-directed synthesis exhibits great significance to the research field of MOMs as these considerations: (i) to access analogues of prototypal MOM platforms that cannot be prepared directly; (2) to create porous materials with new topologies; (3) to transfer the functionality of templates to MOMs; (4) to exert fine control over structural features. In this dissertation, I chose a functional organic material, porphyrin, as templates and succeeded to synthesize a series of porphyrin-encapsulating MOMs, (porph@MOMs), in which the porphyrins were encapsulated inside the cavities as guests. Porphyrins molecules can template the formation cavities with different shapes and sizes (e.g. triangle, square or hexagon) to accommodate the porphyrins molecules when organic ligands with different size and symmetry were utilized during the synthesis. On the other hand, the porphyrins molecules can also template the formation of octahemioctahedral cages or hexahedron cages with porphyrins trapped inside, which further built the tbo, pcu, rtl, zzz, mzz networks. By selecting templated porph@MOMs as platforms, post-synthetic modifications (PSMs) of porph@MOMs were further studied.
