Coordination Driven 2 2 Metallo Macrocycles Isomers Conformational Control And Photophysical Properties
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Coordination Driven 2 2 Metallo Macrocycles Isomers Conformational Control And Photophysical Properties
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Author : Yunting Zeng
language : en
Publisher: OAE Publishing Inc.
Release Date : 2022-06-30
Coordination Driven 2 2 Metallo Macrocycles Isomers Conformational Control And Photophysical Properties written by Yunting Zeng and has been published by OAE Publishing Inc. this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-06-30 with Science categories.
In recent years, fluorescent supramolecular materials have received significant attention due to their wide application prospects. However, the relationship between the conformation of supramolecules and their photophysical properties remains an open question. In this study, two rhomboidal metallacycle isomers, SA and SB, self-assembled with trans- and cis-isomers of tetraphenylethylene-based ditopic pyridyl ligands (LA and LB), and a 120° di-platinum (II) acceptor were prepared. Compared with metallacycle SB constructed by cis- tetraphenylethylene (TPE)-based ligand LB, the curved rhomboidal metallacycle SA constructed with trans-TPE-based ligand LA can restrict molecular motions of the aromatic groups on TPE and exhibits better light-emitting properties. Moreover, curved SA also exhibited better fluorescence stability than isomer SB towards molecules with strongly electron-withdrawing groups. This work provides a new platform to explore the relationship between conformation and the corresponding photophysical properties.
Metallomacrocycles
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Author : Hai-Bo Yang
language : en
Publisher: Royal Society of Chemistry
Release Date : 2018-10-05
Metallomacrocycles written by Hai-Bo Yang and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-10-05 with Science categories.
The metal-ligand coordination of metallomacrocycles allows for the production of both discrete and infinite metallosupramolecular structures with high-degrees of complexity. In recent years, coordination-driven self-assembly has emerged as a powerful noncovalent synthetic strategy to build discrete supramolecular architectures with diverse coordination moieties such as a well-defined shape, size, and geometry. The dynamic features of the metal-ligand bonds result in structures with intriguing properties allowing for a diverse range of applications in host-guest chemistry, sensing, drug delivery and catalysis. This book provides a comprehensive summary of current research in metallomacrocycles. Starting with an introduction to metallomacrocycles constructed via coordination-driven self-assembly, the book then goes on to explore design principles and self-organization. Subsequent chapters then discuss examples of complex and functional metallosupramolecular systems based on metallomacrocycles such as chiral systems and mechanically interlocked architectures. Finally, the book discusses the applications of metallomacrocycles. An essential resource for students and researchers looking to design and construct new metallosupramolecular systems and extend their applications in biological and materials science.
Analytical Methods In Supramolecular Chemistry
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Author : Christoph A. Schalley
language : en
Publisher: John Wiley & Sons
Release Date : 2012-09-25
Analytical Methods In Supramolecular Chemistry written by Christoph A. Schalley and has been published by John Wiley & Sons this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-09-25 with Science categories.
The second edition of "Analytical Methods in Supramolecular Chemistry" comes in two volumes and covers a broad range of modern methods and techniques now used for investigating supramolecular systems, e. g. NMR spectroscopy, mass spectrometry, extraction methods, crystallography, single molecule spectroscopy, electrochemisty, and many more. In this second edition, tutorial inserts have been introduced, making the book also suitable as supplementary reading for courses on supramolecular chemistry. All chapters have been revised and updated and four new chapters have been added. A must-have handbook for Organic and Analytical Chemists, Spectroscopists, Materials Scientists, and Ph.D. Students in Chemistry. From reviews of the first edition: "This timely book should have its place in laboratories dealing with supramolecular objects. It will be a source of reference for graduate students and more experienced researchers and could induce new ideas on the use of techniques other than those usually used in the laboratory." Journal of the American Chemical Society (2008) VOL. 130, NO. 1 doi: 10.1021/ja0769649 "The book as a whole or single chapters will stimulate the reader to widen his horizon in chemistry and will help him to have new ideas in his research." Anal Bioanal Chem (2007) 389:2039-2040 DOI: 10.1007/s00216-007-1677-1
Chirality In Drug Design And Synthesis
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Author : C. Brown
language : en
Publisher: Academic Press
Release Date : 2013-10-22
Chirality In Drug Design And Synthesis written by C. Brown and has been published by Academic Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-10-22 with Social Science categories.
Chirality in Drug Design and Synthesis is a collection of papers that discusses the property of asymmetry in the structural and synthetic chemistry of natural products, including the significance of chirality in medicinal chemistry. These papers examine the need for the preparation and study of pure enantiomers of chiral drug substances and their mechanism of interaction with enzymes and receptors. These papers also investigate the techniques in studying these interactions, as well as analyze the methods for their synthesis in enantiomerically pure form. One paper discusses the pharmacological and pharmacokinetic analyses made that point to the differences in the activity and disposition of enantiometric pairs. Another paper reviews the implications of the neglect of stereoselectivity at the different levels during the examination process of racemic drugs. Since no general guidelines exists for the development of drugs with chiral centers, one paper suggests a case-by-case approach in evaluating the safety and efficacy of drugs, particularly as regards how isomers differ in their effects. This collection is suitable for the pharmacologist, medicinal chemists, toxicologists, mechanistic chemists and synthetic organic chemists.
Metal Organic Frameworks As Heterogeneous Catalysts
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Author : Francesc X. Llabrés i Xamena
language : en
Publisher: Royal Society of Chemistry
Release Date : 2013-07-01
Metal Organic Frameworks As Heterogeneous Catalysts written by Francesc X. Llabrés i Xamena and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07-01 with Science categories.
This book examines the latest research and discovery in the use of MOFs in catalysis, highlighting the extent to which these materials have been embraced by the community.
Metallo Supramolecular Polymers
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Author : Masayoshi Higuchi
language : en
Publisher: Springer Nature
Release Date : 2019-11-12
Metallo Supramolecular Polymers written by Masayoshi Higuchi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-12 with Technology & Engineering categories.
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.
Expanded Contracted Isomeric Porphyrins
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Author : J.L. Sessler
language : en
Publisher: Elsevier
Release Date : 1997-08-21
Expanded Contracted Isomeric Porphyrins written by J.L. Sessler and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997-08-21 with Science categories.
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 direction has emerged in recent years that is devoted to the preparation and study of non-porphyrin polypyrrole macrocycles. Here, the principal objectives have been to generate completely synthetic systems that bear some structural resemblance to naturally-occurring porphyrin derivatives while being quite different in their specific chemical makeup. Within this context, three different research directions have evolved, namely those involving the syntheses of contracted, isomeric, and expanded porphyrins, respectively. It is the chemistry of these systems that is the subject of this book. Because of the newness of the field, the emphasis of this book will be on synthesis and characterization (all work on porphyrin isomers and much of that associated with expanded porphyrins has only appeared in the last 10 years). One chapter on applications has, however, been included. Also, in the context of the preparative portions of the text, some efforts have been made to explain why various porphyrin analogue targets are of interest.
Molecular Machines And Motors
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Author : J.-P. Sauvage
language : en
Publisher: Springer Science & Business Media
Release Date : 2001-07-03
Molecular Machines And Motors written by J.-P. Sauvage and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001-07-03 with Science categories.
This series presents critical reviews of the present position and future trends in modern chemical research. It consists of short and concise reports on chemistry, each written by the world’s renowned experts, and still valid and useful after 5 or 10 years.
Supramolecular Chemistry In The 3rd Millennium
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Author : Catherine E. Housecroft
language : en
Publisher: MDPI
Release Date : 2021-08-18
Supramolecular Chemistry In The 3rd Millennium written by Catherine E. Housecroft and has been published by MDPI this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-08-18 with Science categories.
This Special Issue is one of the first for the new MDPI flagship journal Chemistry (ISSN 2624-8549) which has a broad remit for publishing original research in all areas of chemistry. The theme of this issue is Supramolecular Chemistry in the 3rd Millennium and I am sure that this topic will attract many exciting contributions. We chose this topic because it encompasses the unity of contemporary pluridisciplinary science, in which organic, inorganic, physical and theoretical chemists work together with molecular biologists and physicists to develop a systems-level understanding of molecular interactions. The description of supramolecular chemistry as 'chemistry beyond the molecule' (Jean-Marie Lehn, Nobel Lecture and Gautam R. Desiraju, Nature, 2001, 412, 397) addresses the wide variety of weak, non-covalent interactions that are the basis for the assembly of supramolecular architectures, molecular receptors and molecular recognition, programed molecular systems, dynamic combinatorial libraries, coordination networks and functional supramolecular materials. We welcome submissions from all disciplines involved in this exciting and evolving area of science.
Anion Receptor Chemistry
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Author : Jonathan L Sessler
language : en
Publisher: Royal Society of Chemistry
Release Date : 2007-10-31
Anion Receptor Chemistry written by Jonathan L Sessler and has been published by Royal Society of Chemistry this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007-10-31 with Science categories.
Anion recognition plays a critical role in a range of biological processes, and a variety of receptors and carriers can be found throughout the natural world. Chemists working in the area of supramolecular chemistry have created a range of anion receptors, drawing inspiration from nature as well as their own inventive processes. This book traces the origins of anion recognition chemistry as a unique sub-field in supramolecular chemistry while illustrating the basic approaches currently being used to effect receptor design. The combination of biological overview and summary of current synthetic approaches provides a coverage that is both comprehensive and comprehensible. First, the authors detail the key design motifs that have been used to generate synthetic receptors and which are likely to provide the basis for further developments. They also highlight briefly some of the features that are present in naturally occurring anion recognition and transport systems and summarise the applications of anion recognition chemistry. Providing as it does a detailed review for practitioners in the field and a concise introduction to the topic for newcomers, Anion Receptor Chemistry reflects the current state of the art. Fully referenced and illustrated in colour, it is a welcome addition to the literature.