Cation And Anion Recognition By Calix4arene Based Ligands

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.

This book commemorates the 25th anniversary of the International Izatt-Christensen Award in Macrocyclic and Supramolecular Chemistry. The award, one of the most prestigious of small awards in chemistry, recognizes excellence in the developing field of macrocyclic and supramolecular chemistry Macrocyclic and Supramolecular Chemistry: How Izatt-Christensen Award Winners Shaped the Field features chapters written by the award recipients who provide unique perspectives on the spectacular growth in these expanding and vibrant fields of chemistry over the past half century, and on the role of these awardees in shaping this growth. During this time there has been an upsurge of interest in the design, synthesis and characterization of increasingly more complex macrocyclic ligands and in the application of this knowledge to understanding molecular recognition processes in host-guest chemistry in ways that were scarcely envisioned decades earlier. In October 2016, Professor Jean-Pierre Sauvage and Sir J. Fraser Stoddart (author for chapter 22 "Contractile and Extensile Molecular Systems: Towards Molecular Muscles" by Jean -Pierre Sauvage, Vincent Duplan, and Frédéric Niess and 20 "Serendipity" by Paul R. McGonigal and J. Fraser Stoddart respectively) were awarded the Nobel Prize in Chemistry alongside fellow Wiley author Bernard Feringa, for the design and synthesis of molecular machines.

with contributions by numerous experts

Calixarenes in Action is unique among books devoted to this interesting class of synthetic macrocycles. Rather than emphasizing the molecular properties of calixarenes, it covers in depth their supramolecular functions, enlightening the reader as to the peculiar features of calixarenes as hosts and as platforms for the synthesis of more complex receptors and catalysts. Topics covered in detail include the use of calixarenes in:molecular modeling of calixarenesnon-covalent interactionscrystal engineeringcation recognitionanion recognitionsupramolecular devicesnew materialsself-assembly processessupramolecular catalysisThe interest in calixarenes has grown tremendously in the last few years and this book reports, for each topic, the most recent literature critically evaluated by active researchers in the field. Calixarenes in Action is a valuable reference book for researchers in organic, inorganic, analytical and environmental chemistry and can serve as a graduate-level text for students of supramolecular science and technology.

Comprehensive Supramolecular Chemistry II, Second Edition, Nine Volume Set is a ‘one-stop shop’ that covers supramolecular chemistry, a field that originated from the work of researchers in organic, inorganic and physical chemistry, with some biological influence. The original edition was structured to reflect, in part, the origin of the field. However, in the past two decades, the field has changed a great deal as reflected in this new work that covers the general principles of supramolecular chemistry and molecular recognition, experimental and computational methods in supramolecular chemistry, supramolecular receptors, dynamic supramolecular chemistry, supramolecular engineering, crystallographic (engineered) assemblies, sensors, imaging agents, devices and the latest in nanotechnology. Each section begins with an introduction by an expert in the field, who offers an initial perspective on the development of the field. Each article begins with outlining basic concepts before moving on to more advanced material. Contains content that begins with the basics before moving on to more complex concepts, making it suitable for advanced undergraduates as well as academic researchers Focuses on application of the theory in practice, with particular focus on areas that have gained increasing importance in the 21st century, including nanomedicine, nanotechnology and medicinal chemistry Fully rewritten to make a completely up-to-date reference work that covers all the major advances that have taken place since the First Edition published in 1996

This volume will capture transformational changes in both the chemistry and engineering side of solvent extraction, creating new directions and deepening our understanding of the structure and dynamics of liquid-liquid systems from the molecular- to nano- to meso- to bulk-scale. Reviews will cover advances in microfluidics, new tools for understanding the structure and dynamics of the liquid-liquid interface, ionic liquids in liquid-liquid extraction, molecular dynamics to visualize interactions in the solvent phase, liquid-liquid electrochemistry to interrogate the energetics of interfacial transport and complexation, design of new extractants, and the streamlining of process applications.

A calix[4]urea compound, 5,17-diphenylurea-25, 27-dihydroxy-26, 28-dimethoxycalix[4]arene (13) was synthesized from a coupling reaction between 5,17-diamino-25, 27-dihydroxy-26, 28-dimethoxycalix[4]arene (12) and phenyl isocyanate. Two calix[4]crown urea compounds, 5,17-diphenylurea-25, 27-tetraethylene glycoloxy-26, 28-dimethoxycalix[4]arene (17) and 5,17-dihexylurea-25, 27-tetraethylene glycoloxy-26, 28-dimethoxycalix[4]arene (19) were synthesized from coupling reactions between 5,17-diamino-25, 27-tetraethylene glycoloxy-26, 28-dimethoxycalix[4]arene (16) with phenyl isocyanate and hexyl isocyanate, respectively. 1H-NMR titrations of 13, 17 and 19 with anions in DMSO-d6 showed that 1:1 complex and formed complexes with Cl-, Br-, NO3- and H2PO4- to a different extent. The association constants of 13 and 17 towards anions were calculated and found to vary as H2PO4- > Cl- > Br- > NO3- but those of compound 19 were found to vary as H2PO4- > Br- > NO3-> Cl-. The three compounds cannot bind with I-. However, compared to 13 the presence of the crown unit in 17 and 19 resulted in a lower affinity to bind H2PO4-. Upon addition of Na+ and K+, the binding ability of 17 towards H2PO4- was increased due to the cooperative ion-pair enhancement. However, compound 19 did not show the cooperative ion-pair binding effect.