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Dissertation

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Contents<br />

1 Introduction 1<br />

1.1 Fossil Fuels and Nuclear Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2<br />

1.2 Renewable Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5<br />

1.3 Energy Transformation and Storage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6<br />

1.4 Solar Energy Conversion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8<br />

1.5 Photosynthesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10<br />

1.6 Photocatalyzed Reactions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13<br />

1.7 Mimicking Photosynthesis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17<br />

1.8 Formalisms of Photocatalytic Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . 19<br />

1.9 Multicomponent Systems from Fundamental Building Blocks . . . . . . . . . . . . . 21<br />

1.9.1 Photosensitizers - Light Energy Conversion . . . . . . . . . . . . . . . . . . . . 23<br />

1.9.2 Redox Systems for Charge Separation . . . . . . . . . . . . . . . . . . . . . . . 29<br />

1.9.3 Oxidation Catalysts - Solar Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . 34<br />

1.9.4 Reduction Catalysts - Solar Fuels . . . . . . . . . . . . . . . . . . . . . . . . . . 37<br />

1.10 Intramolecular Photoredoxcatalysts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40<br />

1.10.1 Oligonuclear Coordination Compounds . . . . . . . . . . . . . . . . . . . . . 42<br />

1.10.2 State of the Art Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46<br />

1.10.3 Drawbacks and Starting Points . . . . . . . . . . . . . . . . . . . . . . . . . . . 49<br />

2 Scope of the Thesis 52<br />

3 General Section 54<br />

3.1 Brominated Phenanthrolines - A Gate to new Bridging Ligands . . . . . . . . . . . . 54<br />

3.1.1 Selective Bromination of Phenanthrolines . . . . . . . . . . . . . . . . . . . . 57<br />

3.1.2 Ruthenium Complexes with Brominated Phenanthrolines . . . . . . . . . . . 63<br />

3.1.3 Structural Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69<br />

3.1.4 Photophysical Behavior . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71<br />

3.1.5 Emission Decay Dynamics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76<br />

3.1.6 Electrochemical Characterization . . . . . . . . . . . . . . . . . . . . . . . . . 78

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