Photoinduced Electron Transfer in Porphyrin-Bilayers: Raman Spectroscopy and Dynamics

纽约市立大学城市学院的丹尼尔·阿金斯得到了实验研究的支持， 物理化学计划，研究电子转移（ET）之间 在有序分子矩阵中的供体和受体分子， 皮秒时间分辨拉曼光谱。 他的研究将集中在 (a)伴随ET的结构变化;（B） 邻近分子和ET引起的构象变化 方法;和（c）卟啉衍生物位于其中的系统 在具有明确的距离和方向的人工矩阵中。 的 PI将调查散射物种的结构变化 （反应物、中间体、产物物质或基质）作为时间的函数 在光引发的ET过程之后。 具体实验包括 监测模型系统中的构象变化：合成双层 利用已知距离和取向的插入供体和受体， 并且测量ET的速率作为分离距离或取向， 各种各样。 这些研究集中在嵌入或嵌入的分子之间的电子转移， 附着在分离和定向电子供体和受体的介质上。 这种性质的对齐系统对于重要的生物学意义至关重要。 酶反应和光合作用等过程。 一些实际 对环境与技术的更好理解可促进"附带利益" 在生物工程应用中使用合成ET系统， 作为药物输送和阐明的抗癌机制， 一些药物。 此外，知识的提高可能使我们能够设计 用于捕获和储存太阳能的高效人造分子装置 能源和信息处理在非常高的效率。

Daniel Akins of CUNY City College is supported by the Experimental Physical Chemistry Program to investigate electron transfer (ET) between donors and acceptor molecules in ordered molecular matrices using picosecond time-resolved Raman spectroscopy. His research will focus on (a) structural changes accompanying ET; (b) the interplay between the conformational change induced in neighboring molecules and the ET process; and (c) a system in which porphyrin derivatives are positioned in artificial matrices with well-defined distances and orientations. The PI will investigate the structural changes of the scattering species (reactant, intermediate, product species or matrix) as a function of time after the photoinitiated ET process. Specific experiments include monitoring conformational change in a model system: a synthetic bilayer with intercalated donor and acceptor of known distances and orientations, and measuring rates of ET as either separation distance or orientation is varied. These studies focus on electron transfer between molecules embedded or attached to media that separate and orient electron donors and acceptors. Alignment systems of this nature are crucial for important biological processes such as enzymatic reactions and photosynthesis. Some practical `spin-offs` that may be facilitated by an improved understanding of ET are the use of synthetic ET systems in bioengineering applications such as drug delivery and the elucidation of the cancer-killing mechanisms of some drugs. In addition, improved knowledge might enable us to design efficient artificial molecular devices for capturing and storing solar energy and for information processing at very high efficiencies.