Presidential Young Investigator/Photochemical and Photophysical Electron Transfer Studies

这项在有机动力学计划中颁发的总统青年研究员奖为布朗大学的马修·齐姆特博士的研究提供了支持。齐姆特博士的研究广泛地涉及电子转移，既有机械上的，也有作为分子构象探针的。将研究几个光化学和光物理系统。为了评估电子转移的距离和取向依赖性，将制备给体-间隔基-受体分子，其中给体和受体以不同的角度固定。这些研究可能与螺旋多肽中的分子光电二极管和电子转移速率有关。将使用相干光声方法来提供寿命短至0.08-5纳秒的中间体的动力学和量热数据。不同的给体和受体部分将被放置在聚合物链的末端，并通过增强的施主发光衰减来测量能量传输，以探测在物理应力下的固体中的聚合物构象。

This Presidential Young Investigator Award given in the Organic Dynamics Program provides support for the research of Dr. Matthew Zimmt at Brown University. Dr. Zimmt's research is concerned broadly with electron transfer both mechanistically and as as a probe of molecular conformation. Several photochemical and photophysical systems will be studied. Donor-spacer-acceptor molecules in which the donor and acceptor are rigidly held at differing angles to each other will be prepared in order to assess both the distance and orientational dependence of electron transfer. These studies may be germane to molecular photodiodes and electron transfer rates in helical polypeptides. A coherent optoacoustic method will be used to provide kinetic and calorimetric data for intermediates with lifetimes as short as 0.08-5 nanoseconds. Distinct donor and acceptor moieties will be placed at the termini of polymer chains and and energy transport, as measured by enhanced donor luminescence decay will be used to probe polymer conformation in solids under physical stress.