Design Synthesis And Structure Of Versatile Supramolecular Building Blocks
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Design Synthesis And Structure Of Versatile Supramolecular Building Blocks
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Author : Brock Levin
language : en
Publisher:
Release Date : 2005
Design Synthesis And Structure Of Versatile Supramolecular Building Blocks written by Brock Levin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.
Constructing Predictable Supramolecular Architectures Using Building Blocks Derived From Versatile And Green Synthetic Routes
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Author : Abhijeet Shekhar Sinha
language : en
Publisher:
Release Date : 2013
Constructing Predictable Supramolecular Architectures Using Building Blocks Derived From Versatile And Green Synthetic Routes written by Abhijeet Shekhar Sinha and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with categories.
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 Coordination Complexes
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Author : Sankarasekaran Shanmugaraju
language : en
Publisher: Elsevier
Release Date : 2022-10-28
Supramolecular Coordination Complexes written by Sankarasekaran Shanmugaraju and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-10-28 with Science categories.
Supramolecular Coordination Complexes: Design, Synthesis, and Applications discusses the growth of the field and explores the advantages, opportunities and latest applications of supramolecular complexes. Beginning with an introduction to design principles, synthetic methods, and post-synthetic functionalization of supramolecular complexes, the book goes on to compile the different analytical and computational modeling methods used to understand the structure and functional properties of supramolecular structures. Applications of supramolecular complexes in biomedicine, sensing, catalysis and materials are then explored in detail. Drawing on the knowledge of a global team of experts, this book provides a wealth of interesting information for students and researchers working in the design, synthesis or application of such complexes. Discusses cutting-edge approaches for the investigation of supramolecular coordination chemistry Summarizes a varied range of supramolecular coordination, complex designs and applications Highlights the interdisciplinary connections between supramolecular chemistry and the fields of biology and materials science
Synthesis And Electronic Properties Of Dibenzothieno Isoindole Dione Building Blocks For Organic Electronic Devices
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Author : Emily Albright
language : en
Publisher:
Release Date : 2018
Synthesis And Electronic Properties Of Dibenzothieno Isoindole Dione Building Blocks For Organic Electronic Devices written by Emily Albright and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018 with Chemical biology categories.
The ability to control the physical and electronic properties of conjugated polymers and small molecules has led to considerable focus on developing new electron-accepting (EA) and electron-donating (ED) building blocks, which are essential for obtaining new and efficient organic electronic materials. This work involves the design, synthesis and characterization of fused thieno-isoindole scaffolds as versatile electronic building blocks. The advantages of the dibenzothieno-isoindole dione scaffold include the potential for a concise, 3-step synthetic route from easily available starting materials and the capacity to fine-tune physical, optical, and electronic properties via numerous synthetic handles. A short efficient synthesis to dibenzothieno-isoindole dione derivatives was therefore developed from commercially available starting materials. Two steps are required; a Suzuki-Miyaura coupling followed by an oxidative cyclization. The synthesis of several dibenzothieno-isoindole dione derivatives will be discussed as well as structure activity relationships, solid-state structure, and physicochemical properties. The investigation of noncovalent interactions involving halogens has led to the discovery of numerous reliable motifs for supramolecular design. Four isomers of diiodo-xylene were synthesized and their single crystal X-ray structures determined. I⋯I interactions were found to play a strong role in defining the crystal packing patterns of these simple aromatic structures.
Design Synthesis And Self Assembly Of Giant Shape Amphiphiles With Precisely Controlled Compositions Interactions And Geometries Via A Molecular Lego Approach
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Author : Su Zebin
language : en
Publisher:
Release Date : 2019
Design Synthesis And Self Assembly Of Giant Shape Amphiphiles With Precisely Controlled Compositions Interactions And Geometries Via A Molecular Lego Approach written by Su Zebin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019 with Amphiphiles categories.
Self-assemblies of soft matters attract broad interests of material scientists since this technology provides versatile designs, relatively low economic cost, convenient route to construct ordered structures at different scales. Tremendous achievements such as various of hierarchical architectures and diverse attracting properties have been achieved by utilizing by self-assemblies of polymer building blocks. However, the challenges of precise controls of designed chemical primary structures, compositions, molecular topology and exact constructions of assembled structures in synthetic polymers are far away from being well addressed. In this dissertation, a novel approach named "molecular Lego approach" has been utilized to construct various well-defined giant molecules, constructed by several types of building blocks, which are nano-sized molecules with precise molecular structure, relatively rigid conformation, and defined molecular symmetry. Three categories of "giant shape amphiphiles" with different driving force for self-assemblies were designed, synthesized, and investigate in detail. First, we designed and synthesized a series of nanosized giant shape amphiphiles in which a triphenylene core is attached to six identical polyhedral oligomeric silsesquioxane (POSS) cages at the periphery through covalent linkers with tunable lengths. Giant shape amphiphiles are molecular building blocks that consist of different moieties of distinct shapes, and engage in competing interactions. The relatively weak [pi-pi] stacking interactions among conjugated aromatic triphenylene cores enable the segregation from peripheric BPOSS cages (POSS functionalized with seven isobutyl groups). Moreover, the tunability of the linker length enables the formation of various ordered spherical phases. Using this platform, we report the experimental observation of the FK Z phase in a soft matter system. Based on these results, we then designed and studied the self-assembly phase transition behaviors of another two series of giant shape amphiphiles. The driving force of these two series of giant shape amphiphiles are only [pi-pi] stacking interactions supplied by triphenylene core, but also hydrogen bonding supplied by the linkers. With systematically tuning the length and rigidity of the linkers, we observed various of phases, including DDQC phase, F-K [sigma] phase, body centered cubic (BCC) phase and HEX phase. Furthermore, we find two sets of giant shape amphiphiles based on benzene-1,3,5-tricarboxamide and cyclotriphosphazene. There is not [pi-pi] stacking interaction between these two types of cores. The driving force for these two sets of samples are mainly hydrogen bonding. These two sets of giant shape amphiphiles self-assemble into BCC phase and A15 phase. These results suggest that the crown shape molecular design is a general way to construct complex spherical phases. These studies suggest that "molecular Lego approach" self-assemblies based on well-defined giant shape amphiphiles can be a powerful platform for achieving unconventional hierarchical structures and pave a new way for supramolecular self-assembly with expected structure, designed properties and function.
Molecular Architecture
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Author :
language : en
Publisher:
Release Date : 1990
Molecular Architecture written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with categories.
Design Synthesis And Application Of Novel Conjugated Materials
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Author : Haichang Zhang
language : en
Publisher: Frontiers Media SA
Release Date : 2021-02-11
Design Synthesis And Application Of Novel Conjugated Materials written by Haichang Zhang 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 2021-02-11 with Science categories.
Supramolecular Chemistry Of Biomimetic Systems
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Author : Junbai Li
language : en
Publisher: Springer
Release Date : 2017-10-10
Supramolecular Chemistry Of Biomimetic Systems written by Junbai Li and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-10-10 with Technology & Engineering categories.
This book investigates the latest developments in supramolecular assembly systems for mimicking biological structures and functions. Consisting of 14 chapters, it covers various assembly systems, such as polysaccharides, peptides, proteins, biopolymers, natural materials and various hybrid systems. Further, it focuses on different types of supramolecular systems with particular functions or structures that are relevant to living systems. A number of modern techniques used to study the supramolecular systems, such as total internal reflection fluorescence microscopy (TIRFM) and two-photon confocal microscopy, are also introduced in detail. Unlike conventional books on supramolecular assemblies, this book highlights the functions of the assembly systems, particularly their biological applications. As such, it offers a valuable resource for experienced researchers, as well as graduate students working in the field of supramolecular chemistry and biomimetic systems.
Non Covalent Interactions In The Synthesis And Design Of New Compounds
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Author : Abel M. Maharramov
language : en
Publisher: John Wiley & Sons
Release Date : 2016-05-03
Non Covalent Interactions In The Synthesis And Design Of New Compounds written by Abel M. Maharramov 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 2016-05-03 with Science categories.
This book aims to overview the role of non-covalent interactions, such as hydrogen and halogen bonding, π-π, π-anion and electrostatic interactions, hydrophobic effects and van der Waals forces in the synthesis of organic and inorganic compounds, as well as in design of new crystals and function materials. The proposed book should allow to combine, in a systematic way, recent advances on the application of non-covalent interactions in synthesis and design of new compounds and functional materials with significance in Inorganic, Organic, Coordination, Organometallic, Pharmaceutical, Biological and Material Chemistries. Therefore, it should present a multi- and interdisciplinary character assuring a rather broad scope. We believe it will be of interest to a wide range of academic and research staff concerning the synthesis of new compounds, catalysis and materials. Each chapter will be written by authors who are well known experts in their respective fields.
Nanoscale Assembly
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Author : Wilhelm T.S. Huck
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-07-11
Nanoscale Assembly written by Wilhelm T.S. Huck 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 2006-07-11 with Technology & Engineering categories.
Nanotechnology has received tremendous interest over the last decade, not only from the scientific community but also from a business perspective and from the general public. Although nanotechnology is still at the largely unexplored frontier of science, it has the potential for extremely exciting technological innovations that will have an enormous impact on areas as diverse as information technology, medicine, energy supply and probably many others. The miniturization of devices and structures will impact the speed of devices and information storage capacity. More importantly, though, nanotechnology should lead to completely new functional devices as nanostructures have fundamentally different physical properties that are governed by quantum effects. When nanometer sized features are fabricated in materials that are currently used in electronic, magnetic, and optical applications, quantum behavior will lead to a set of unprecedented properties. The interactions of nanostructures with biological materials are largely unexplored. Future work in this direction should yield enabling technologies that allows the study and direct manipulation of biological processes at the (sub) cellular level.