Energy Transfer Dynamics in Biomaterial Systems

The role of quantum coherence in promoting the e ciency of the initial stages of photosynthesis is an open and intriguing question. Lee, Cheng, and Fleming, Science 316, 1462 (2007) The understanding and design of functional biomaterials is one of today's grand challenge areas that has sparked an intense exchange between biology, materials sciences, electronics, and various other disciplines. Many new - velopments are underway in organic photovoltaics, molecular electronics, and biomimetic research involving, e. g. , arti cal light-harvesting systems inspired by photosynthesis, along with a host of other concepts and device applications. In fact, materials scientists may well be advised to take advantage of Nature's 3. 8 billion year head-start in designing new materials for light-harvesting and electro-optical applications. Since many of these developments reach into the molecular domain, the - derstanding of nano-structured functional materials equally necessitates f- damental aspects of molecular physics, chemistry, and biology. The elementary energy and charge transfer processes bear much similarity to the molecular phenomena that have been revealed in unprecedented detail by ultrafast op- cal spectroscopies. Indeed, these spectroscopies, which were initially developed and applied for the study of small molecular species, have already evolved into an invaluable tool to monitor ultrafast dynamics in complex biological and materials systems. The molecular-level phenomena in question are often of intrinsically quantum mechanical character, and involve tunneling, non-Born- Oppenheimer e ects, and quantum-mechanical phase coherence.

Contenu

Excitation Energy Transfer in Complex Molecular and Biological Systems.- Electronic Energy Transfer in Photosynthetic Antenna Systems.- Mixed Quantum Classical Simulations of Electronic Excitation Energy Transfer and Related Optical Spectra: Supramolecular Pheophorbide#x2013;a Complexes in Solution.- Conformational Structure and Dynamics from Single-Molecule FRET.- The Many Facets of DNA.- Quantum Mechanics in Biology: Photoexcitations in DNA.- Energy Flow in DNA Duplexes.- Anharmonic Vibrational Dynamics of DNA Oligomers.- Simulation Study of the Molecular Mechanism of Intercalation of the Anti-Cancer Drug Daunomycin into DNA.- Quantum Dynamics and Transport at Interfaces and Junctions.- Ultrafast Photophysics of Organic Semiconductor Junctions.- Green Function Techniques in the Treatment of Quantum Transport at the Molecular Scale.- New Methods for Open Systems Dynamics.- Time-Local Quantum Master Equations and their Applications to Dissipative Dynamics and Molecular Wires.- Reduced Density Matrix Equations for Combined Instantaneous and Delayed Dissipation in Many-Atom Systems, and their Numerical Treatment.- New Methods for Mixing Quantum and Classical Mechanics.- Quantum Dynamics in Almost Classical Environments.- Trajectory Based Simulations of Quantum-Classical Systems.- Do We Have a Consistent Non-Adiabatic Quantum-Classical Statistical Mechanics?.