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 11 of 11 for “"Π-conjugation"”.
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Functionalization of polymer–lipid hybrid materials using supramolecular assembly and π-conjugation chemistry
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-08-01
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Synthesis and Photophysics of Varied Substituted DPNDs for Potential PDT Applications
… advanced photophysical methods to unveil how π-conjugation and topology influence excited-state dynamics. Furthermore, we varied the polarity of the samples to shed light on the contributions of charge transfer (CT) dynamics and their interplay with triplet excited state formation of the three …
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Accelerating Materials Discovery for Optical Applications using Machine Learning, Natural Language Processing and Density Functional Theory
… models, and techniques for quantifying π-conjugation in organic molecules (Chapter 2). The research presents compelling results, starting with the development of a complete workflow that extracts refractive indices and dielectric constants from scientific publications, resulting in a …
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Synthesis, non-linear optical and electrochemical properties of novel organoimido polyoxometalate derivatives
… as the donor strength increases, and/or the π-conjugation extends, in similar fashion to organic systems. Interestingly, the highest β0-values obtained these derivatives exceed those of any dipolar organic system with comparable donor, π-system and absorption profile, and thus they have much …
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New Methods for Palladium-catalyzed Decarboxylative Benzylation, Arylation and Dearomatization Reactions
… primary benzyl electrophiles without extended π-conjugation. Our efforts were then directed toward developing a highly stereospecific decarboxylative coupling of acetylides and ketone enolates with secondary benzyl electrophiles that possess a 1,1-diarylmethane structure. The coupling of …
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Exploring the Optical and Redox Properties of π-Conjugated Boron Difluoride Formazanate Dyes
… utilizes different strategies such as extended π-conjugation, planarity of the backbone, donor-acceptor interactions, etc. to modulate the frontier molecular orbitals and band gaps of these systems. The resulting materials are redox-active and exhibit rich optical properties including high molar …
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Fundamentals of Excess Electron Transport in Biologically Relevant Systems
… the addition of electron donating groups and π conjugation. Preliminary studies in this final model system with an aromatic amine of strong reduction potential showed no difference in excess electron transport when compared to the aromatic amine with a weaker reduction potential.
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Synthesis, characterisation and application of novel quinones for the detection of latent fingermarks
… and anthraquinones as they differ only by π conjugation. Another aim of this thesis was to synthesise a variety of quinones with differences in conjugation and substitution in order to compare and determine differences in quantum yield and whether these effects would influence their ability …
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Experimental and Theoretical Study of Resonance Raman Spectroscopy in Ground and Excited Electronic States
… Raman intensities of molecules with extended π conjugation. Conjugated thiophene derivatives have a variety of interesting optical and electronic properties, which makes them ideal targets for studies of charge-transport processes. Additionally, the delocalized π electron distribution gives …
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Spectroscopic investigations on the molecular motions and solution chemistry of the medicinal pigment curcumin.
… intramolecular hydrogen bonding and extended π-conjugation in the keto-enol tautomer of curcumin. Although curcumin has shown many medicinal effects, there are two major challenges regarding the utilisation of curcumin for disease treatments. These challenges are the poor solubility of curcumin …
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Novel Host Materials for Blue Phosphorescent Organic Light-Emitting Diodes
… to high triplet energies by confining the π-conjugation: by introducing torsion in the molecular structure, by choosing a meta-linkage and by a non-conjugated linkage. The first and second approach was applied to carbazole-based host materials, whereas the third was demonstrated on …