Coherent Multidimensional Spectroscopy of the Oxygen Evolving Complex in Photosystem II

在化学测量和成像项目的支持下，以及化学学部化学结构、动力学和机制项目的共同资助下，威斯康星大学的约翰·赖特教授和他的团队正在开发并使用强大的新型激光光谱探针来研究光合作用如何从水中产生氧气。氧气的产生是光合作用中最困难的一步，因为它需要协调地去除四个电子。在了解植物的氧演化复合体（OEC）方面已经付出了大量的努力，但其复杂性限制了进展。赖特教授的方法是使用多个激光器来产生多个量子相干（MQCs）——来自OEC不同部分的波函数的混合物。反过来，mqc又重新发射出具有其起源的OEC部分高度特征的光束，从而揭示了从水中产生氧气所需的四个步骤中的每个步骤的细节——这是开发有效的人工光合作用所需的关键见解。揭开OEC的神秘面纱将对我们的社会产生广泛的影响，因为它是开发新技术以满足我们未来能源需求的关键。这个项目的目标是了解OEC，它将为自然界如何实现高效太阳能转换提供一个模型，科学家们可以在设计新技术时使用这个模型。同样清楚的是，新的激光方法在许多科学领域具有广泛的适用性，可以更深入地探索分子结构和动力学如何控制材料。S属性和应用。赖特教授也是为大学教学开发新的主动学习方法的领导者，他将在这些努力中纳入他的研究。他是一个大学联盟的成员，致力于为不同的学生受众实施和推进有效的教学实践，作为他们职业生涯的一部分。

With support from the Chemical Measurement and Imaging Program and co-funding from the Chemical Structures, Dynamics, and Mechanisms Program in the Division of Chemistry, Prof. John Wright and his group at the University of Wisconsin are developing and employing powerful new laser spectroscopic probes to investigate how photosynthesis generates oxygen from water. Oxygen generation is the most difficult step in photosynthesis because it requires the coordinated removal of four electrons. A great deal of effort has gone into understanding the oxygen evolving complex (OEC) in plants but its complexity has limited progress. Professor Wright's methods use multiple lasers to create multiple quantum coherences (MQCs) - mixtures of wave functions from different parts of the OEC. The MQCs in turn re-emit light beams that are highly characteristic of the OEC parts from which they originate, thereby revealing details of each of the four steps required to create oxygen from water - key insights needed to develop efficient artificial photosynthesis.Unraveling the mysteries of the OEC will have a broad impact in our society because it is a key to developing new technologies to satisfy our future energy needs. This program's goal of understanding the OEC will provide a model of how nature achieves high efficiency solar conversion that scientists can use in designing new technologies. It is also clear that the new laser methods have wide applicability in many fields of science for probing more deeply into how molecular structure and dynamics control a material?s properties and applications. Professor Wright is also a leader in developing new active learning methods for college teaching, and will incorporate aspects of his research in those efforts. He is part of a consortium of universities committed to implementing and advancing effective teaching practices for diverse student audiences as part of their professional careers.