Supramolecular assemblies, constructed using single electro– or photoactive molecules as building blocks, offer a striking way to create materials whose organized architecture makes them suitable for developing molecular electronic devices. To achieve this objective, one must not only be able to direct the fabrication of the assembly and characterize it fully, it is also important to be able to address the nanoscopic structure, i.e., to connect the everyday macroscopic and nanoscopic worlds. The best approach to realizing this key objective is to use solid surfaces as platforms.
This book describes the properties of supramolecular assemblies that are constructed on solid platforms but where the properties of the support play a very significant role in the overall properties of the system, i.e., its distinct functions can no longer be assigned to the molecular components and the platform on which it is assembled.
In a novel, highly integrated manner, this book describes:
- Fabrication and characterization of interfacial supramolecular assemblies
- Properties and functions of suitable platforms
- Issues of electronic and photonic addressability
- Modes of communication and devices such as molecular wires
- Optoelectronic gates
- Chemosensors developed with this innovat ive approach
Interfacial Supramolecular Chemistry.
Objectives of this Book.
Testing Contemporary Theory Using ISAs.
Analysis of Structure and Properties.
Formation and Characterization of Interfacial Supramolecular Assemblies.
Electron and Energy Transfer Properties.
Interfacial Electron Transfer Processes at Modified Semiconductor Surfaces.
2. Theoretical Framework for Electrochemical and Optical Processes.
Photoinduced Interfacial Electron Transfer.
Elucidation of Excited–State Mechanisms.
References and Notes.
3. Methods of Analysis
Structural Characterization of Interfacial Supramolecular Assemblies.
Voltammetric Properties of Interfacial Supramolecular Assemblies.
Spectroscopic Properties of Interfacial Supramolecular Assemblies.
Intensity–Modulated Photocurrent Spectroscopy.
Time–Resolved Spectroscopy of Interfacial Supramolecular Assemblies.
4. Formation and Characterization of Modified Surfaces.
Substrate Choice and Preparation.
Formation of Self–Assembled Monolayers.
Structural Characterization of Monolayers.
Structural Features and Structure–Property Relationships of Thin Polymer Films.
5. Electron and Energy Transfer Dynamics.
Electron and Energy Transfer Dynamics of Adsorbed Monolayers.
Nanoparticles and Self–Assembled Monolayers.
Surface–Photoactive Substrate Interactions.
Photoactive Self–Assembled Monolayers.
Photocurrent Generation at Modified Metal Electrodes.
Photoinduced Molecular Switching.
Photoinduced Processes in Bio–SAMs.
Photoinduced Electron and Energy Transfer in SAMs.
Electrochemistry of Thin Redox–Active Polymer films.
Conclusions and Future Directions.
6. Interfacial Electron Transfer Processes at Modified Semiconductor Surfaces.
Structural and Electronic Features of Nanocrystalline TiO2 Surfaces.
Physical and Chemical Properties of Molecular Components.
Photovoltaic Cells Based on Dye–Sensitized TiO2.
Photoinduced Charge Injection.
Interfacial Supramolecular Assemblies.
Electrochemical Behavior of Nanocrystalline TiO2 Surfaces.
Alternative Semiconductor Substrates.
7. Conclusions and Future Directions.
Conclusions – Where to from Here....?
Molecular Components and Nanotechnology.
Interfacial Photochemistry at Conducting Surfaces.
Modified Semiconductor Surfaces.