Author: Zheng FengPublisher:
ISBN:
Category :
Languages : en
Pages : 252
Book Description
Synthesis and Characterization of Novel Supramolecular Architectures from Diamide Building Blocks in Crystal Lattice
Author: Zheng FengSynthesis and characterization of new electro-active building blocks for supramolecular and materials chemistry
Author: Suhil Salem MabrukMaking Crystals by Design
Author: Dario BragaPublisher: John Wiley & Sons
ISBN: 9783527315062
Category : Science
Languages : en
Pages : 380
Book Description
An excellent overview of the manifold aspects of modern crystal engineering. From design and preparation to spectroscopy and applications, this handbook both covers and evaluates all aspects of crystal engineering. Clearly structured, it provides an overview of the current status as seen from its various angles as well as a comparison of different techniques and applications. An essential source of high quality information for everyone working in this booming and interdisciplinary field: spectroscopists, physical and inorganic chemists as well as materials scientists working in nanotechnology and the pharmaceutical industry.
Constructing Predictable Supramolecular Architectures Using Building Blocks Derived from Versatile and 'green' Synthetic Routes
Author: Abhijeet Shekhar SinhaPublisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A series of four bifunctional ligands based on [beta]-diketonate moieties bearing methyl, chloro, bromo and iodo substituents and their corresponding Cu(II) complexes were synthesized and crystallographically characterized in order to explore the possibility of using relatively weak halogen···halogen contacts for the directed assembly of predictable architectures in coordination chemistry. The four ligands have characteristic O--H···O intramolecular hydrogen bonds, and the structures of the halogenated ligands contain extended 1-D architectures based on C=O···X halogen bonds, which can be explained on the basis of electrostatic considerations. The corresponding Cu(II) complexes show a constant coordination chemistry for all the ligands, wherein the metal ion sits in a slightly distorted square-planar pocket, without any coordinated or uncoordinated solvent molecules. Furthermore, the absence of halogen-bonds in the coordination complexes is due to the depleted charge on the potential halogen-bond acceptors. As a result, the halogen-bonds are unable to compete with the inherent close packing in the crystal lattice, and thus display a head to head close-packed motif for methyl, chloro, and bromo, substituted Cu(II) complexes. The enhanced polarizability of the iodine atom, produces a more electropositive surface which means that this structure cannot accommodate a linear head-to-head arrangement due to electrostatic repulsion, and thus a unique close-packed structure very different from the three iso-structural complexes is observed for the iodo substituted Cu(II) complex.1 Oximes offer great opportunities in supramolecular chemistry (hydrogen-bond donors), as well as in coordination chemistry (strong coordinating ligands). Hence, we established a versatile and robust mechanochemical route to aldehyde/ketone--oxime conversions for a broad range of aldehydes2 and ketones3 via a simple mortar--pestle grinding method. The relative reactivity of aldehydes vs. ketones under these conditions was also explored, along with an examination of the possible connection between reactivity and electronic substituent effects. The growing interest in the oxime (RR'C=N--OH) functionality, and a lack of the systematic examinations of the structural chemistry of such compounds, prompted us to carry out analysis of intermolecular oxime···oxime interactions, and identify the hydrogen-bond patterns for four major categories of oximes (R' = --H, --CH3, --NH2, --CN), based on all available structural data in the CSD, complemented by three new relevant crystal structures.4 It was found that the oximes could be divided into four groups depending on which type of predominant oxime···oxime interactions they present in the solid-state: (i) O--H···N dimers (R[superscript]2[subscript]2(6)), (ii) O--H···N catemers (C(3)), (iii) O--H···O catemers (C(2)), and (iv) oximes in which the Rʹ group accepts a hydrogen bond from the oxime moiety catemers (C(6)). In order to explore and establish a hierarchy between hydrogen (HB) and halogen (XB) bonds in supramolecular architectures, we designed and synthesized two ditopic HB/XB donors, and screened them with a series of 20 HB acceptors. IR was used as a preliminary and reliable tool to gather information on the presence/absence of HB/XB in the different cases. We were able to get the solved single-crystal data for three of the 40 reactions. In two out of two cases with symmetric ditopic acceptors, both HB and XB were present leading to 1-D infinite chains, which suggests that in a system of "equal opportunities", both these interactions can be tolerant of each other. In the only case with asymmetric ditopic acceptor, the HB donor binds to the best acceptor, whereas XB donor binds to the second best acceptor. This selectivity can be rationalized on the basis of electrostatic considerations, where the HB donor was shown to have a higher molecular electrostatic potential than the XB donor. Finally, we designed and synthesized a versatile and dynamic metallomacrocycle based on the 2,2ʹ-bipyridyl backbone capable of controlling the metal-metal distance within the macrocycle cavity. The macrocycle was synthesized by high-dilution method and characterized by several spectroscopic techniques (IR, NMR, Mass, UV-Visible). Also, the macrocycle:Cu(II) stoichiometric ratio was determined by Job's continuous variation method using UV-Visible spectroscopy, and was found to be 1:2, respectively. (1) Aakeröy, C. B; Sinha, A.S.; Chopade, P.D.; Desper, J. Dalton Trans. 2011, 40, 12160. (2) Aakeröy, C.B.; Sinha, A.S.; Epa, K.N.; Spartz, C.L.; Desper, J. Chem. Commun. 2012, 48, 11289. (3) Aakeröy, C.B.; Sinha, A.S. RSC Adv. 2013, 3, 8168. (4) Aakeröy, C.B.; Sinha, A.S.; Epa, K.N.; Chopade, P.D.; Smith, M.M.; Desper, J. Cryst. Growth Des. 2013, 13, 2687.
Supramolecular Chemistry in the 3rd Millennium
Author: Catherine E. HousecroftPublisher: MDPI
ISBN: 3036514635
Category : Science
Languages : en
Pages : 264
Book Description
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.
Crystal Engineering: From Molecules and Crystals to Materials
Author: Dario BragaPublisher: Springer Science & Business Media
ISBN: 9401145059
Category : Science
Languages : en
Pages : 502
Book Description
Crystal engineering is an interdisciplinary area that cuts across the traditional subdivisions of chemistry. Fuelled by our increasingly precise understanding of the chemistry and properties of supramolecular systems, interest in the potential of the field has increased rapidly. The topics discussed in the 28 contributions in this book provide a state-of-the-art description of the field and offer new research ideas that, if pursued, will serve to strengthen the field at the interface between supramolecular chemistry and materials science.
Calixarenes In Action
Author: Luigi MandoliniPublisher: World Scientific
ISBN: 1783261897
Category : Science
Languages : en
Pages : 283
Book Description
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.
Iptycenes Chemistry
Author: Chuan-Feng ChenPublisher: Springer Science & Business Media
ISBN: 3642328881
Category : Science
Languages : en
Pages : 384
Book Description
Iptycenes Chemistry: From Synthesis to Applications provides a comprehensive overview of the development of iptycene chemistry in the past seventy years. This book covers: (1) the basic nomenclature and general properties of iptycenes and their derivatives; (2) the synthesis and functionalization reactions of triptycenes, pentiptycenes, higher iptycenes, heterotriptycenes, and homotriptycenes; (3) the methods for the preparation of iptycene-based polymers with different types; and (4) the applications of iptycenes and their derivatives in molecular machines, materials science, host-guest chemistry, self-assembly, coordination chemistry, physical organic chemistry, medicinal chemistry, and so on. Consequently, such a book is not only helpful to researchers working in iptycene chemistry, but can also facilitate future research in wide areas.
Anion Receptor Chemistry
Author: Jonathan L SesslerPublisher: Royal Society of Chemistry
ISBN: 1847552471
Category : Science
Languages : en
Pages : 431
Book Description
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.
Artificial Metalloenzymes and MetalloDNAzymes in Catalysis
Author: Montserrat DiéguezPublisher: John Wiley & Sons
ISBN: 3527804072
Category : Technology & Engineering
Languages : en
Pages : 431
Book Description
An important reference for researchers in the field of metal-enzyme hybrid catalysis Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a comprehensive review of the most current strategies, developed over recent decades, for the design, synthesis, and optimization of these hybrid catalysts as well as material about their application. The contributors—noted experts in the field—present information on the preparation, characterization, and optimization of artificial metalloenzymes in a timely and authoritative manner. The authors present a thorough examination of this interesting new platform for catalysis that combines the excellent selective recognition/binding properties of enzymes with transition metal catalysts. The text includes information on the various applications of metal-enzyme hybrid catalysts for novel reactions, offers insights into the latest advances in the field, and contains an informative perspective on the future: Explores the development of artificial metalloenzymes, the modern and strongly evolving research field on the verge of industrial application Contains a comprehensive reference to the research area of metal-enzyme hybrid catalysis that has experienced tremendous growth in recent years Includes contributions from leading researchers in the field Shows how this new catalysis combines the selective recognition/binding properties of enzymes with transition metal catalysts Written for catalytic chemists, bioinorganic chemists, biochemists, and organic chemists, Artificial Metalloenzymes and MetalloDNAzymes in Catalysis offers a unique reference to the fundamentals, concepts, applications, and the most recent developments for more efficient and sustainable synthesis.