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Showing 1 to 20 of 671 for “"Hydrogen Bonding"”.
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The Role of Electrical Interactions in Hydrogen Bonding
… in recent years with great success to study weak hydrogen bonded complexes. Spectroscopic constants and potential energy surfaces are all issues that may be addressed by theoretical investigations. One recurring conclusion from the various studies has been the importance of electrical interactions …
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High-Pressure Studies on Hydrogen Bonding in Solids
Made available in DSpace on 2014-12-10T21:24:53Z (GMT). No. of bitstreams: 1 7500374.pdf: 4278666 bytes, checksum: 6b04e7a80103ee905e93670e4574761e (MD5) Previous issue date: 1974
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Design and Materials Applications of Quadruply Hydrogen-Bonding Modules
In Chapter 4, the application of the DeUG˙DAN heterocomplex in the arena of surface chemistry is described. Several types of siliceous surfaces and nanoparticles, and polymer beads were covalently modified to bear DeUG. These surfaces were characterized by a number of complementary surface …
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Design and Materials Applications of Quadruply Hydrogen Bonding Modules
… made in recent years toward the development of hydrogen bonding modules, there still exists a recognized need to expand the “supramolecular toolkit” with synthetically accessible, high-affinity, high-fidelity modules that are readily incorporated into materials. Part I of this dissertation …
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Living Polymerization for the Introduction of Tailored Hydrogen Bonding
… comprising both covalent and non-covalent bonding to tune ultimate physical properties, a variety of methodologies and functionalization strategies were employed. First, protected functional initiation, namely 3-[(N-benzyl-N-methyl)amino]-1-propyllithium and …
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New hydrogen bonding motifs for anion and neutral guest complexation
… with barbital revealed binding through six hydrogen bonds. The synthesis of a more soluble version of the receptor was attempted. The synthesis of a neutral guest templated catenane was also attempted in an effort to expand on the simple cleft work.<br/>Finally, a new triazole strapped …
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The Role of Hydrogen Bonding in Alkali Metal Ion Solvation
In addition to the experimental measurements, RRKM/Evaporative ensemble calculations were performed on $\rm Na\sp+(CH\sb3OH)\sb{1-9}$ ion clusters to determine the internal energy distributions of the ion clusters in the ion beam as a function of cluster size. It was found that the vibrational …
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Synthesis and characterization of ammonium ionenes containing hydrogen bonding functionalities
… Non-covalent interactions including nucleobase hydrogen bonding and electrostatics were studied in ammonium ionenes. The non-covalent interactions are expected to increase the effective molecular weight of polymeric precursors and induce microphase separation due to intermolecular associations. …
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Synthesis and Characterization of Cation-Containing and Hydrogen Bonding Supramolecular Polymers
Non-covalent interactions including nucleobase hydrogen bonding and phosphonium/ammonium ionic aggregation were studied in block and random polymers synthesized using controlled radical polymerization techniques such as nitroxide mediated polymerization (NMP) and reversible addition-fragmentation …
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Thermochemical Study of Crystalline Solutes Dissolved in Ternary Hydrogen-Bonding Solvent Mixtures
The purpose of this dissertation is to investigate the thermochemical properties of nonelectrolyte solutes dissolved in ternary solvent mixtures, and to develop mathematical expressions for predicting and describing behavior in the solvent mixtures. Forty-five ternary solvent systems were studied …
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Studies of hydrogen bonding in protonic ionic liquids and their binary mixtures
… is nearly thirty years since the first report of hydrogen-bonding in room-temperature ionic liquids, which was met by an immediate chorus of derision. Today, it is universally accepted, but still has not received the degree of attention that it deserves.<br/><br/>The focus of this thesis was the …
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Deuterium and Nitrogen-14 Nuclear Quadrupole Double Resonance Studies of Hydrogen Bonding
… accompanies formation of N-H...O and N-H...N hydrogen bonds in the solid state was investigated via deuterium and nitrogen-14 nuclear quadrupole resonance (nqr) spectroscopy. The experimental techniques of double resonance with level crossing and double resonance with continuous coupling were …
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Synthesis and evaluation of quadruple hydrogen-bonding modules for smart materials applications
… (DeUG) and 2,7-diamidonaphthyridine (DAN) H-bonding modules have been shown to form a highly stable complex (Kassoc = 10^8 M^–1) in chloroform solution. Use of these units in applications requires derivatives that can be incorporated into polymers and onto surfaces. A method for the synthesis …
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Hydrogen bonding in aqueous solution and peptide helicity studied using model systems
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 1999.
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Designing Acrylic Block Copolymers with Multiple Hydrogen Bonding or Multiple Ionic Bonding
The dynamic characteristics of hydrogen and ionic bonding contributes to the reversible properties of acrylic polymers, opening new avenues for designing materials with mechanical strength and processability. These non-covalent interactions function as physical crosslinks, which provide enhanced …
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Single-conformation spectroscopy of hydrogen bonding networks: Solvation, synthetic foldamers, and neurodegenerative diseases
<p>The hydrogen bond is one of the most important interactions in natural processes ranging from protein folding to chemical reactions. Two complementary methodologies are applied to understanding this important interaction: top-down and bottom-up. Top-down methods use large molecules, such as …
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