Exciton dynamics in supramolecular assemblies of p-phenylenevinylene oligomers
Exciton dynamics in supramolecular assemblies of p-phenylenevinylene oligomers
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DOI：
10.1016/s0379-6779(03)00307-2
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发表时间：
2003-10-09
期刊：
影响因子：
4.4
通讯作者：
Phillips, RT
中科院分区：
文献类型：
--
作者：
Herz, LM;Daniel, C;Phillips, RT
我们研究了氢键功能化的对苯撑乙烯撑低聚物的手性组装中的光激发动力学。在低激发密度的制度中，发光瞬态受激子向缺陷位点的迁移的影响，指示激子沿着分子组装体的快速扩散。此外，在高激发密度下，双分子激子湮灭导致叠层激子能级的快速减少。(C)2003 Elsevier B.V.保留所有权利。
We have investigated the dynamics of photoexcitations in chiral assemblies of p-phenylenevinylene oligomers functionalized with hydrogen-bonding motifs. In the regime of low excitation densities, the luminescence transients are influenced by the migration of excitons to defect sites, indicative of fast diffusivity of excitons along the molecular assemblies. In addition, at high excitation densities, bimolecular exciton annihilation is shown to result in the fast depopulation of the stacks' excitonic energy levels. (C) 2003 Elsevier B.V. All rights reserved.