| 报告题目 | Exciton Localization and Dynamics in Nanotubular Molecular Aggregates |
| 报告人 | Prof. Jasper Knoester |
| 报告人单位 | Zernike Institute for Advanced Materials,University of Groningen |
| 报告时间 | 2013-08-10 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心 |
| 报告介绍 | 报告摘要：
Self-assembled aggregates of dye molecules exhibit intriguing optical properties caused by their collective optical excitations, Frenkel excitons. Examples are exciton superradiance, strong nonlinear optical response, fast excitation energy transport, and efficient light-sensitization. In this talk, I will discuss recent results on tubular molecular aggregates. [1] These systems, consisting, for instance, of carbocyanine molecules [2,3] or porphyrin derivatives,[4,5] currently attract much attention, because they closely resemble in size (diameter approx. 10 nm, length up to microns) and optical properties the antenna systems that occur in bacterial photosynthetic systems. Hence, on the one hand they serve as model systems to understand these complex natural systems and on the other hand they hold the perspective to create artificial light-harvesting systems. I will discuss the theoretical concepts underlying the exciton states in such dye aggregates, recent progress in understanding and modeling their localization and dynamic properties, and the consequences for their optical spectroscopy. The special role played by the cylindrical geometry of these quasi-one-dimensional systems will be stressed. Throughout the talk, connections between theory and experiment are made.[1-5] I will also address our most recent research aiming at first-principles modeling of the structure and optics of tubular molecular dye aggregates.[6]
References
[1] C. Didraga, J.A. Klugkist, and J. Knoester, J. Phys. Chem. B 2002, 106, 11474-11486.
[2] D.M. Eisele, J. Knoester, S. Kirstein, J.P. Rabe, and D. Vanden Bout, Nature Nanotechnology 2009, 4, 658-663.
[3] D.M. Eisele, …, J. Knoester, J.P. Rabe, and D.A. Vandenbout, Nature Chemistry 2012, 4, 655-622.
[4] S.M. Vlaming, R. Augulis, M.C.A. Stuart, J. Knoester, and P.H.M. van Loosdrecht, J. Phys. Chem. B 2009, 113, 2273-2283
[5] A. Stradomska and J. Knoester, J. Chem. Phys. 2010, 133, 094701.
[6] F. Haverkort, A. Stradomska, A.H. de Vries, and J. Knoester, J. Phys. Chem. B 2013, 117, 5857-5867. |
