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 “"Viologens"”.
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Polypyrrole modified with sulfated β-cyclodextrin: characterization and application in the sensing of viologens
… electroactive viologen compounds. The three viologens were detected by means of differential pulse voltammetry (DPV), while for methyl viologen constant potential amperometry (CPA) experiments were also performed. These techniques gave a good linear response for the current measured at the …
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Design, Synthesis and Characterisation of π-Extended Viologen-Based Molecular and Supramolecular Complexes with Cucurbit[n]urils
Viologens, 4,4'-bipyridinium dications (V$^{2+}$), have attracted much attention as electron mediators in a variety of photochemical, electrochemical and chemical processes ranging from catalysis, electrochromic devices to solar energy conversion and storage systems. % The different applications of …
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An Electrochemical Investigation into the Corrosion Protection Properties of Coatings for the Active Metal Copper
… The electrochemical deposition of three viologens, methyl viologen (MV), benzyl viologen (BV) and ethyl viologen (EV) at copper in the presence of a 0.10 mol dm-3 NaCl supporting electrolyte was studied. The formation of the viologen films was achieved by cycling the copper electrode from …
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Using the Marcus Inverted Region and Artificial Cofactors to Create a Charge Separated State in <i>De Novo</i> Designed Proteins
… able to attach covalently to a set of different viologens using Copper assisted alkyne-azide cycloaddition (CuAAC) click chemistry. The proteins incorporate zinc porphyrins as the primary electron donor, and an iron porphyrin as a placeholder cofactor or final electron acceptor. The proteins …
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Pseudorotaxanes and Supramolecular Polypseudorotaxanes Based on the Dibenzo-24-Crown-8/Paraquat Recognition Motif
… for the first time by using complexes based on viologens and crown ethers as examples. While the bis(hexafluorophosphate) salts of paraquat derivatives are predominantly ion paired in acetone (and other low dielectric constant solvents presumably) the complex based on dibenzo-24-crown-8 and …
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In-situ monitoring of photocatalytic reactions in optofluidic microreactors
… the electron transfer from carbon nanodots to viologens, transient absorption spectroscopy was then performed to probe changes on timescales of 1 nanosecond to 1 millisecond. Finally, a new ultralow volume fibre-based fluorescence spectroscopy method was realised. As a proof of principle, the …
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Development of novel indicators
… made to enhance the rate of the reaction of the viologens with UV light by changing the halide of the salt or adding electron donating species. There is no positive effect noted with the addition of these materials, but changing the halide does alter the UV spectrum of the viologen species, …
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Automated small molecule synthesis for accelerated discovery of photo- and electroactive organic materials
… visible absorption. A curated library of 950 viologens from 17 bipyridine cores and 41 pendant groups—selected via k-means clustering with DFT and RDKit descriptors for steric, electronic, and hydrophobic diversity—provided a large chemical library for synthesis using modular anhydrous …
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Towards a Fundamental Understanding of Aqueous Organic Redox Flow Batteries – A Study of Degradation, Aggregation, and Reactivity
… different organic molecules, including quinones, viologens, phenazines, and alloxazines, have been investigated as potentially cheaper RFB active molecules. While a few molecules have shown good performance, most organic molecules considered for RFBs have lower energy density and generally …
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Functional Molecular Spacers for Plasmonic Nanojunctions: Design, Synthesis and Self-Assembly
This thesis is centred around the interaction of few-molecule arrays with gold surfaces and the enhanced optical fields that occur in nanoscale junctions between gold nanoparticles (AuNPs). This behaviour is enabled by optically resonant collective electron density oscillations (and electrostatic …