| 报告题目 | Optical and Environmental Control of Excited State Dynamics: Molecular Switches and Photobiology |
| 报告人 | Prof. Roseanne J. Sension |
| 报告人单位 | Department of Chemistry, University of Michigan at Ann Arbor |
| 报告时间 | 2013-03-11 |
| 报告地点 | 合肥微尺度物质科学国家实验室9004会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室 |
| 报告介绍 | 报告摘要：
Photoinduced transformations of small polyenes find application in molecular electronics, nano-scale optical switches, molecular motors, catalysis, and photobiology. These transformations involve both electrocyclic ring-opening reactions, ring-closure reactions, and cis-trans isomerization reactions. The 1,3-cyclohexadiene chromophore is a prototypical photochemically active unit found in a number of different molecular systems. Following UV excitation this chromophore undergoes a series of ultrafast non-radiative transitions followed by electrocyclic ring-opening and ground state isomerization. In the work described here UV-visible ultrafast transient absorption spectroscopy, ultrafast x-ray fragmentation, and optical pulse shaping were used to characterize and to control the excited state dynamics of 1,3-cyclohexadiene, selectively substituted cyclohexadiene compounds including alpha-terpinene and alpha-phellandrene, and the biologically active compound provitamin D3. |
