Discrimination Of Mobile Supramolecular Chirality
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Discrimination Of Mobile Supramolecular Chirality
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Author : Ayumi Imayoshi
language : en
Publisher: Springer Nature
Release Date : 2021-11-18
Discrimination Of Mobile Supramolecular Chirality written by Ayumi Imayoshi and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-11-18 with Science categories.
This book proposes a novel concept for molecular recognition. In the field of asymmetric synthesis approaching the mature science, asymmetric discrimination and catalytic synthesis of chiral supramolecules still stand as unsolved problems. The extreme difficulty in asymmetric synthesis of such supramolecules may result from the mobile nature of supramolecular chirality. Here the author shows the first highly enantioselective synthesis of mechanically chiral supramolecules. In the presence of a chiral organocatalyst, a mechanically planar chiral rotaxane was obtained with p erfect enantiopurity (>99% ee) with an excellent selectivity. The dynamic and flexible recognition mode enabled asymmetric synthesis of supramolecules with conformational flexibility and mobility. The recognition mode of the catalyst is a contrast to the traditional static and rigid recognition mode of the typical conventional catalysts. The concept of dynamic molecular recognition will be adopted as a novel concept in a wide range of fields beyond the field of organic chemistry, including material chemistry, biochemistry, and medicinal chemistry.
Fundamentals Of Supramolecular Chirality
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Author : Roberto Purrello
language : en
Publisher: World Scientific
Release Date : 2021-10-18
Fundamentals Of Supramolecular Chirality written by Roberto Purrello and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-10-18 with Science categories.
Fundamentals of Supramolecular Chirality is a critical description of the start and advancement of supramolecular chirality. This book focuses on the noncovalent approach with some supplementary examples of covalent supramolecular chirality.This contribution to supramolecular chirality is not intended to be a mere catalogue and description of the work done. It also traces a philosophical path following the development and possible perspectives of this topic, providing not a review but a critical examination of the field.
Transition Metals In Supramolecular Chemistry
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Author : L. Fabbrizzi
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-03-09
Transition Metals In Supramolecular Chemistry written by L. Fabbrizzi 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 2013-03-09 with Science categories.
Since the pioneering publications on coordination chemistry by Lehn and Pedersen in the late 1960s, coupled with the more orthodox interest from the transition metal chemists on template reactions (Busch, 1964), the field of supramolecular chemistry has grown at an astonishing rate. The use of transition metals as essential constituents of multi-component assemblies has been especially sharp in recent years, since the metals are prone to quick and reversible redox changes, and there is a wide variety of metal--ligand interactions. Such properties make supramolecular complexes of transition metal ions suitable candidates for exploration as light--energy converters and signal processors. Transition Metals in Supramolecular Chemistry focuses on the following main topics: (1) metal controlled organization of novel molecular assemblies and shapes; (2) design of molecular switches and devices operating through metal centres; (3) supramolecular catalysts that mimic metalloenzymes; (4) metal-containing sensory reagents and supramolecular recognition; and (5) molecular materials that display powerful electronic, optoelectronic and magnetic properties.
Supramolecular Chirogenesis In Chemical And Related Sciences
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Author : Victor Borovkov
language : en
Publisher: Frontiers Media SA
Release Date : 2021-06-01
Supramolecular Chirogenesis In Chemical And Related Sciences written by Victor Borovkov and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-06-01 with Science categories.
Advances In Chromatography
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Author : Eli Grushka
language : en
Publisher: CRC Press
Release Date : 2016-04-19
Advances In Chromatography written by Eli Grushka and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-04-19 with Medical categories.
For more than four decades, scientists and researchers have relied on the Advances in Chromatography series for the most up-to-date information on a wide range of developments in chromatographic methods and applications. Volume 44 of this authoritative series once again compiles the work of expert contributors in order to present timely and cutting
Supramolecular Chemistry
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Author : Paúl Beer
language : en
Publisher: Oxford University Press
Release Date : 2022
Supramolecular Chemistry written by Paúl Beer and has been published by Oxford University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022 with Anions categories.
The renowned Oxford Chemistry Primers series, which provides focused introductions to a range of important topics in chemistry, has been refreshed and updated to suit the needs of today's students, lecturers, and postgraduate researchers. The rigorous, yet accessible, treatment of each subjectarea is ideal for those wanting a primer in a given topic to prepare them for more advanced study or research. Moreover, cutting-edge examples and applications throughout the texts show the relevance of the chemistry being described to current research and industry.The learning features provided, including questions at the end of every chapter and online multiple-choice questions, encourage active learning and promote understanding. Furthermore, frequent diagrams, margin notes, further reading, and glossary definitions all help to enhance a student'sunderstanding of these essential areas of chemistry.Supramolecular Chemistry provides a concise and fully-illustrated introduction to one of the fundamental areas of modern chemical research, the concepts of which are essential to understanding interactions between molecules.The primer is supported by online resources and is available for students and institutions to purchase in a variety of formats.The e-book offers a mobile experience and convenient access along with functionality tools, navigation features and links that offer extra learning support: www.oxfordtextbooks.co.uk/ebooks
Modified Cyclodextrins Scaffolds And Templates For Supramolecular Chemistry
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Author : Chris J Easton
language : en
Publisher: World Scientific
Release Date : 1999-04-29
Modified Cyclodextrins Scaffolds And Templates For Supramolecular Chemistry written by Chris J Easton and has been published by World Scientific this book supported file pdf, txt, epub, kindle and other format this book has been release on 1999-04-29 with Science categories.
Through modification, the natural cyclodextrins are effective templates for the generation of a wide range of molecular hosts. This makes it possible to tailor a cyclodextrin host to a particular guest, to meet specific requirements in the host-guest complex, and opens the way to diverse new areas of supramolecular chemistry. Metallocyclodextrins, rotaxanes and catenanes, as well as surface monolayers of modified cyclodextrins, are readily obtained. The native cyclodextrins serve as scaffolds on which functional groups and other substituents can be assembled, with controlled geometry. This results in substantially improved molecular recognition and procedures for chemical separation, including enantiomer discrimination, through guest binding. Access to the gamut of functional groups greatly expands the utility of cyclodextrins in chemical synthesis and provides catalysts which mimic the entire range of enzymic activity. Modifications to the cyclodextrins also lead to a wide range of photochemistry of cyclodextrin complexes, through which the enhancement of guest reactivity occurs; in addition, light harvesting molecular devices and photochemical frequency switches may be constructed. In solution, modified cyclodextrins have been used to construct molecular reactors, as well as molecular, temperature and pH sensors. At surfaces, they form semipermeable membranes and sensor electrodes. Such exciting fields of chemistry, made possible only through modifications to the natural cyclodextrins, are the subject of this book.
Enzyme Or Whole Cell Immobilization For Efficient Biocatalysis Focusing On Novel Supporting Platforms And Immobilization Techniques
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Author : Wen-Yong Lou
language : en
Publisher: Frontiers Media SA
Release Date : 2021-04-21
Enzyme Or Whole Cell Immobilization For Efficient Biocatalysis Focusing On Novel Supporting Platforms And Immobilization Techniques written by Wen-Yong Lou and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2021-04-21 with Science categories.
International Women Of Supramolecular Chemistry
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Author : Jennifer Hiscock
language : en
Publisher: Frontiers Media SA
Release Date : 2022-03-17
International Women Of Supramolecular Chemistry written by Jennifer Hiscock and has been published by Frontiers Media SA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-03-17 with Science categories.
Possible Scenarios For Homochirality On Earth
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Author : Michiya Fujiki
language : en
Publisher: Buy this from MDPI Books
Release Date : 2019-11-14
Possible Scenarios For Homochirality On Earth written by Michiya Fujiki and has been published by Buy this from MDPI Books this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-14 with Science categories.
In 1978, Fred Hoyle proposed that interstellar comets carrying several viruses landed on Earth as part of the panspermia hypotheses. With respect to life, the origin of homochirality on Earth has been the greatest mystery because life cannot exist without molecular asymmetry. Many scientists have proposed several possible hypotheses to answer this long-standing L-D question. Previously, Martin Gardner raised the question about mirror symmetry and broken mirror symmetry in terms of the homochirality question in his monographs (1964 and 1990). Possible scenarios for the L-D issue can be categorized into (i) Earth and exoterrestrial origins, (ii) by-chance and necessity mechanisms, and (iii) mirror-symmetrical and non-mirror-symmetrical forces as physical and chemical origins. These scenarios should involve further great amplification mechanisms, enabling a pure L- or D-world.