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.
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Showing 1 to 15 of 15 for “"pi-pi-interactions"”.
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Determination of Atrazine and Selected Respective Metabolites Using Strong Cation Exchange Resins
… a new approach is needed to achieve greater trapping for polar analytes. In this study strong cationic exchange (SCX) resins consisting of sulfonated polystyrene are investigated for their extraction capabilities of the selected analytes. By exploiting acid-base and pi-pi interactions the …
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FLUORESCENT PROBE INVESTIGATIONS OF MICROENVIRONMENTS OF ANALYTICAL INTEREST (REVERSED-PHASE, POLYETHYLENIMINE, POLARIZATION)
… reflect the nature and extent of lipophilic interactions. Tetramethylammonium promoted ANS penetration into surface structure. Tetrabutylammonium overcame aqueous surface alkyl aggregation, which greatly enhanced ANS-surface interaction of C18. For the other phases at high cation …
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Computational and experimental studies of acenes, starphenes and [60]fullerene derivatives
… Substituents that may engage in non-bonding interactions are not well described by the same DFT model, however these shortcomings can be overcome by implementing an appropriate effective-core potential on carbon atoms.</p><p>Like acenes, starphenes are a class of polycyclic aromatic …
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Neutrino emission and pion condensation in dense matter
… equilibrium thermodynamic conditions obeyed by a pion condensed state of dense neutron or neutron star matter are derived. Then simple model calculations of negative pion condensation that satisfy the equilibrium conditions are carried out. In the simplest of these models (p-wave pion-nucleon …
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Porphyrins as second order nonlinear optical materials
… of porphyrins as well as their very large $\pi$-conjugated systems, three classes of high $\beta$-value push-pull porphyrins were synthesized and subsequently successfully engineered into Langmuir-Blodgett (LB) films for a systematic evaluation of porphyrins as $\chi\sp{(2)}$ materials. Class …
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Rational design of hydrogen-free catalytic active sites
… rational molecular design and biologically inspired reactivity are based on enzymatic active sites, which are reengineered into robust metal-organic fluoroalkylated scaffolds that, for the first time, exhibit structural asymmetry and tunable [pi]-[pi] interactions both in solution and solid …
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Cyclodextrin-based rotaxanes for material science applications
… blocking groups on either end that can form pi-pi interactions was prepared in Chapter 5. Co-crystallisation experiments with the rotaxanes 1.9 and 5.5 illustrate that blocking groups of rotaxanes can be used as synthons to guide intermolecular self-assembly to regulate the formation of …
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Cyclodextrin-based rotaxanes for material science applications
… blocking groups on either end that can form pi-pi interactions was prepared in Chapter 5. Co-crystallisation experiments with the rotaxanes 1.9 and 5.5 illustrate that blocking groups of rotaxanes can be used as synthons to guide intermolecular self-assembly to regulate the formation of …
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Model-Based Measures Of Interrater Agreement
… in in vitro assays, which provides a prototypical compound for a new class of MTDLs for the potential therapy of AD. In the present study, JWS was resynthesized utilizing optimized methodology and tested in rodent and non-human primate models, which revealed that JWS not only improved some …
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Investigating the structure-function relationships of Plasmodium Haem Detoxification Protein and Phosphatidylinositol 4-kinase
… and (ii) Phosphatidylinositol-4- Kinase β (PI4Kβ) which plays an essential role in multiple stages of the parasite lifecycle and is a clinically validated drug target for malaria chemotherapy. Previous efforts to characterise HDP have been limited to experiments using the refolded form of …
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Applications of room temperature ionic liquids in interfacial polymerization
… polymer could be ascribed to the intermolecular interactions between the ILs and the polymer, which affected the development of the polymer morphology. The polyamides prepared with ILs showed larger intrinsic viscosities, and consequently higher molecular weights, compared to the one prepared …
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Donor-Acceptor Block Copolymers in Organic Electronics - Spectroscopy, Charge Transport, Morphology and Device Application
… two blocks. The interplay between intermolecular interactions, mesoscopic crystalline structures and the block copolymer microphase separation determine the material properties and therefore the device characteristics. Thus, these block copolymers offer a unique platform to study the electronic …
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The mechanism of an unusual benzo/benzo photocycloaddition reaction : photophysical and photochemical investigation of [3.3] orthocyclophanes with two face-to-face preoriented benzenoid chromophores
The clean and reversible [6pi+6pi] photocycloaddition (= PCA) in a [3.3] orthocyclophane (= OCP), in which two benzene chromophores are rigidly held in an unusually proximate, strongly interacting, face-to-face orientation, is the key step in the Pagodane - Dodecahedrane - Scheme. Due to the …
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Strengths and limitations of bioretention sorbent amendments to simultaneously remove metals, PAHs, and nutrients from urban stormwater runoff
… Metal removal by BFS occurred primarily via precipitation was due to the BFS mineral structure and high/alkaline pH. The effectiveness of CCF for removing both metals and PAHs was due to its lignocellulose structure and diverse functional groups. CCF could remove metals through several mechanisms …
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Estudio de las interacciones débiles presentes en sólido y en disolución en complejos de paladio y platino
… , donde: R = H, CH3; L = Cl, 2,6-dimetilpiridina, PMe2Ph, PMePh2, dppm, (Ar-NNN-Ar)- (siendo Ar = 4-(CH3O)C6H4, 4-(CH3)C6H4, C6H5, 4-F-C6H4, C6F5), además de los complejos binucleares del tipo: [Pd2{C6H4-N(R)-N=C(CH3)-C5H4N}{C6H4-N(R’)-N=C(CH3)-C5H4N}(μ-LL)]n (μ-LL = dppm, dppe, …