Solution and Gas-Phase Photochemistry Involving Multiple and Delocalized Excited States

分子的光化学和光物理性质 其从离域和/或多个激发态起反应 将进行研究，特别强调评估 贯通键和贯通空间的相对作用 交互.在溶液中，多官能基底将是 研究，利用天线发色团或离域 激发以激活透明的远端组 或在紫外线中弱吸收，或吸收，但 可以通过天线被选择性地激活。特别 注意：（1）电荷转移传输 通过类固醇框架，（2）能量转移， 三功能类固醇，和（3）西格玛的潜在作用 便于虚拟轨道的键合中继机制 混合在气相中，研究将强调新的 发现了硫酮的诺里什II型化学。 %%% 有机动力学计划的这笔赠款支持 普渡大学莫里森教授的继续研究。 分子中的官能团会被光激发 吸收和这种能量被吸收的机制 转移到分子中的其他官能团， 研究了一个特别值得关注的问题是， 能量通过键或空间传递。在 研究的另一个阶段，独特的光化学和 含硫化合物的物理性质将是 研究了

Photochemical and photophysical properties of molecules which react from delocalized and/or multiple excited states will be studied, with a particular emphasis on evaluating the relative roles of through-bond and through-space interactions. In solution, polyfunctional substrates will be studied, utilizing antenna chromophores or delocalized excitation to activate distal groups which are transparent or weakly absorbent in the ultraviolet or are absorbent but may be selectively activated through the antenna. Special attention will be given to: (1) charge transfer transmission through the steroid frame-work, (2) energy transfer in trifunctional steroids, and (3) the potential role of sigma bonded relay mechanisms to facilitate virtual orbital mixing. In the gas-phase, studies will emphasize the newly discovered Norrish Type II chemistry of thioketones. %%% This grant from the Organic Dynamics Program supports the continuing work of Professor Morrison at Purdue University. Functional groups in molecules will be excited by light absorption and the mechanism by which this energy is transferred to other functional groups in molecules will be studied. A particular concern will be to determine if the energy is transferred through bonds or through space. In another phase of the research, unique photochemical and photophysical properties sulfur containing compounds will be investigated.