Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 73 for “"H-bonding"”.
-
Synthesis of diene ligands with H-bonding capabilities for bioimaging applications
Investigations of the synthesis of novel bioprobes (Scheme A), potentially useful in bioreactions and sugar sensing, are described. A preliminary study is reported that aims to validate the feasibility of tricarbonyl iron complexes and their derivatives in applications as a constituent part of …
-
Surface Forces in Thin Liquid Films of H-Bonding Liquids Confined between Hydrophobic Surfaces
… between macroscopic hydrophobic surfaces in H-bonding liquids, including water, ethanol, and water-ethanol mixtures. The first part of the present study involves the measurement of the hydrophobic forces in the thin liquid films (TLFs) confined between two identical hydrophobic surfaces of …
-
Mirroring Enzymes: The Role of H-Bonding In HQuin-BAM Catalyzed Asymmetric Aza-Henry Reactions: A DFT Study into the Reactivity, Mechanism, and Origins of Selectivity
… electrophile and the nucleophile through dual H-bonding during C-C bond formation and is thus essential for both reaction rate and selectivity. Analysis of the H-bonding interactions revealed that there was a strong preference for the formation of a homonuclear positive charge-assisted H-bond, …
-
Role of fluctuations and defects in select condensed matter problems
… electron donor-acceptor assembly linked via an H-bonding bridge. The model suggests that it is possible for the electron transfer rate through a deuterated H-bonding assembly to exceed the rate through a protonated H-bonding bridge at low temperature, consistent with experimental findings. Next, …
-
On the phase behavior and particle formation in polyimide/solvent/nonsolvent ternary systems
… equilibrium approach was considered in the B-bonding studies of these ternary systems. The effect of H-bonding on the physical properties and phase behavior of the ternary systems was investigated. The critical requirements for the control of polymer particle size and size distribution during …
-
Templated synthesis of synthetic oligomers
… which are able to assemble into duplexes by H-bonding between sequence-complementary oligomers. This thesis describes a new class of melamine oligomers composed of alternating triazine and piperazine units, which are equipped with phenol and phosphine oxide recognition groups. The order of the …
-
Synthesis and characterization of bis-MPA based branched polymers with thymine core
… as a core moiety and an active centre for H-bonding. The formation of assemblies was investigated.
-
Design, synthesis and development of novel indolocarbazole derivatives as potential anti-cancer agents
… yields. Chemical diversity within this H-bonding scaffold was then studied by substitution with a panel of biologically relevant electrophiles, and by reductive desulfurisation. Optimisation of difficult heterogeneous literature conditions for oxidative desulfurisation of thiouracils was …
-
Dual c–h functionalization of n-aryl amines & development of novel hydrogen bonding catalysts
… asymmetric catalysts that operate via H-bonding. In this context, I developed the synthesis of chiral multifunctional polythioureas, which operates via an intramolecular H-bonding.
-
An investigation of medium effects on the one and two-dimensional electronic spectroscopy of chlorophyll a
… be most relevant for our study were viscosity, H-bonding formation and polarity. While the first two were shown to be responsible for a persistent inhomogeneity in the 2D spectra, the kinetics of aggregate formation in water solvent mixtures were found to be influenced by the polarity and the …
-
Hydrogen bonded cavity and polymeric nanotubular assemblies from small bicyclic monomers /
… and simultaneous establishment of 3H- and 2H-bonding modes. The large cavity of the capsule was utilized for C60 inclusion. Enantiomer resolution of 9-benzyl-9-azabicyclo[3.3.1]nonane-2,6-diol was performed. This precursor was utilized in the synthesis of bis-isocytosine monomers, which …
-
Elucidation Of Chiral Recognition Mechanisms Of Solutes By Amylose Tris[(s)-Alpha-Methylbenzylcarbamate] Sorbent
… spectra showed evidence of substantial hydrogen bonding (H-bonding) interactions in the pure polymer phase, and additional H-bonding interactions between AS and benzoin. Density Functional Theory (DFT) was used to model the chain-chain and chain-benzoin H-bonding or other interactions. From high …
-
The synthesis and study of novel squaramide-based anion sensors
… sensing and recognition. The mechanism of H-bonding interaction based anion sensing and recognition are particularly discussed, followed by the introduction of a series examples of anion receptors and sensors containing functional groups with the capability of H-bonding to anions. As the core …
-
Study of the Interplay Among Non -Covalent Interactions in Structural Determination of Gas Phase Cluster Ions
… of Li+(Benzene)n(Water)1--4 clusters, pi-H bonding bands dominated, while water-water hydrogen bonding features dominated the spectra of Cs+(Benzene)n(Water)1--4 clusters. The lithium ion retains a full solvent shell of four waters, while the cesium ion becomes partially dehydrated. This …
-
Catalytic implications of confined solvent ensembles within Lewis acid zeolites
… H-bonded 2-butanol networks. The ordered H-bonding solvent network present in hydrophobic Sn-Beta stabilizes the transfer hydrogenation transition state to a greater extent than the liquid-like 2-butanol solvent present in hydrophilic Sn-Beta, giving rise to higher turnover rates on …
-
Structural Basis for the Molecular Recognition of Androgen Receptor Ligands: Insights Guiding the Design and Synthesis of Novel Nonsteroidal Ligands
… molecular dynamics simulations (MMDS). Key H-bonding partners with the 17-hydroxy group and 3-keto group of testosterone are Asn705 and Thr877; and Gln711 and Arg752, respectively. These models also show the presence of a unique unoccupied sub-pocket within the AR binding pocket that may be …
-
A study of inter- and intramolecular interactions through neutron compton scattering and low temperature matrix isolation infrared spectroscopy
… due to competition between solvent-polymer H-bonding verses internal H-bonding structure; though better stabilised by the additional hydrophobic effects of methanol, pure water solvation shows this behaviour. It is additionally seen that the mixture of water and methanol results in a …
-
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 …
-
Transport of Liquid Phase Organic Solutes in Liquid Crystalline Membranes
… transport of solute intra-molecular hydrogen bonding and solute/LC intermolecular hydrogen bonding. Hydrogen-bonding effects are a significant factor in the permeation selectivity of positional isomers. The reduction of available hydrogen-bond donors in aromatic ortho-isomers due to …
-
Quantifying Cooperativity in Non-Covalent Networks
… interactions with the intramolecular H bonding group (phenol or pyridine). The same scaffold with an intramolecular H-bond to a pyridine was used to study anilines and sulfonamides. The value of κ for the anilines when H-bonding intermolecularly to a phosphine oxide was found to be -0.10 …
Page 1 of 4