Photon-Controlled Organic Molecular Spintronics

通过这个奖项，有机和高分子化学项目支持了西北大学的Michael R.Wasielewski教授的工作。这项研究将涉及对如何控制通过有机分子的电荷和自旋传输的基本理解，这对于开发电子、计算机、能源生产和自旋电子器件的构造的新方法至关重要。激光驱动的分子激发态的快速形成导致相关自旋的产生，与现代脉冲电子顺磁共振技术相结合，将被用于产生和操纵多自旋系统。例如，在具有特定给体-受体距离和取向的共价连接的有机给体-受体分子中，光引发的电子转移导致形成高度自旋极化的自由基对，其中的初始自旋态被很好地定义。这些有机自由基离子对在室温下表现出微秒的相干自旋运动，在低温下表现出更长的自旋运动，这使得这种相干可以为新的有机信息处理设备提供基础。这项研究的更广泛影响涉及到培训年轻科学家，包括本科生和女性，在合成方法的组合中制造复杂分子，量子化学和高分辨率光谱学，以研究合成的化合物。这将使这些学生精通化学的一个广泛的跨学科领域，这将使他们能够成为独立的科学家，并学会在团队中工作，这在当今的市场中是非常必要的。此外，这项工作的结果将影响电荷传输、太阳能、纳米技术和器件制造以及有机磁性等领域。

With this award, the Organic and Macromolecular Chemistry Program supports the work of Professor Michael R. Wasielewski of Northwestern University. This research will involve development of a fundamental understanding of how to control charge and spin transport through organic molecules which is critical to the development of new approaches to electronics, computers, energy production and in the construction of spintronic devices. Rapid, laser-driven formation of molecular excited states leading to the production of correlated spins combined with modern pulsed electron paramagnetic resonance techniques will be used to generate and manipulate multi-spin systems. For example, photoinitiated electron transfer within covalently-linked organic donor-acceptor molecules having specific donor-acceptor distances and orientations results in formation of highly spin-polarized radical pairs in which the initial spin state is well defined. These organic radical ion pairs display coherent spin motion for microseconds at room temperature and longer at low temperatures, which makes it possible that this coherence can provide the basis for new organic information processing devices.The broader impacts of this research involve the training of young scientists, including undergraduates and women, in a combination of synthetic methodology, to make complex molecules, quantum chemistry and high resolution spectroscopy, to study the synthesized compounds. This will enable these students to become proficient in a broad interdisciplinary area of chemistry which will allow them to become independent scientists and learn to work in a team, so necessary in today's marketplace. In addition, the results of this work will impact the fields of charge transport, solar energy, nanotechnology and device fabrication, and organic magnetism.