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 8 of 8 for “"Charge delocalization"”.
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Studies of sodium azide with tetraphenylcyclopentadienones and various analogs
… did not react with azide, presumably due to charge delocalization. Also studied as a cyclic analog was 2,7-diphenyltropone which did not react due to the aromatic character of the tropone ring system. A reaction did occur with diphenylcyclopropenone to give an unidentified product. However, …
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Electronic response of phosphorus and nitrogen based ligands on metal coordination
… very sensitive to the Lewis-acidity and the charge concentration of the coordinated metal, adapting its coordination mode to the electronic requirements of the cation (electronic differentiation). Thus, bidentate (P,N)-chelating, tridentate (P,N)-chelating together with C-coordination and …
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Charge transfer engineering in Phenyl-modified Carbon Nitride-based hybrid systems: from powder Photocatalysts to Thin films
… however, its performance is limited by rapid charge carrier recombination, low mobility, and inefficient charge utilization. To overcome these intrinsic drawbacks, this thesis adopts charge transfer engineering as a central design strategy, focusing on controlling charge generation, …
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Ultrafast electron transfer and intersystem crossing in bimetallic molecules
… FeIICoIII molecule following metal-to-metal charge transfer (MMCT) excitation. Femtosecond optical transient absorption (OTA) spectroscopy supported by time-dependent density functional theory (TD-DFT) find evidence of long-lived FeII ligand-field excited states, suggesting that the MMCT …
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An investigation into vibrational dynamics in organic semiconductors
… of vibrational dynamics and their effect on charge transport in thin films of organic semiconductors. Two classes of organic semiconductors are investigated- crystalline small molecules and conjugated polymers. Although device performance of both classes of materials has greatly improved over …
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Thermoelectric and Charge Transport in Doped Semi-Crystalline Polymers
… To achieve this, it is paramount to understand charge and entropy transport as well as the related key parameters affecting the electrical and thermoelectric properties in doped OSCs. Herein, doped poly(2,5-bis(3-tetradecylthiophen2-yl)thieno-[3,2-b]thiophene), PBTTT and its derivates are …
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Iron in oxides, silicates and alloys under extreme pressure-temperature conditions
… properties of magnetite in terms of a gradual charge delocalization induced by pressure. (3) Our study of wüstite (FexO) is focused on the high pressure – low temperature phase diagram of the Fe-end member in the (Mg,Fe)O system. We perform high resolution neutron diffraction experiments in …