当前位置：
X-MOL 学术
›
J. Phys. Chem. Lett.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Suppressing Excimers in H-Aggregates of Perylene Bisimide Folda-Dimer: Role of Dimer Conformation and Competing Assembly Pathways
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-07-12 00:00:00 , DOI: 10.1021/acs.jpclett.7b01338 Samaresh Samanta 1 , Debangshu Chaudhuri 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-07-12 00:00:00 , DOI: 10.1021/acs.jpclett.7b01338 Samaresh Samanta 1 , Debangshu Chaudhuri 1
Affiliation
|
Long-lived excitons in H-aggregates hold great promise for efficient transport of excitation energy, provided they are not scavenged by structurallly relaxed excimers. We report solution self-assembly of a perylene bisimide (PBI) folda-dimer that exhibits two distinct kinetic stages: an initial fast assembly leads to metastable aggregates with large excimer contribution that is followed by a slower growth of stable, extended H-aggregates free of excimers. Mechanistic investigations reveal an interplay of two competing aggregation pathways, where suppression of excimers is directly linked to the crossover from an isodesmic to cooperative aggregation. How the comeptition between two self-assembly pathways is influenced by the conformational flexibility of the folda-dimer is also discussed.
中文翻译：
抑制Bi双酰亚胺折叠-二聚体H-聚集体中的准分子：二聚体构象和竞争装配途径的作用
H聚集体中的长寿命激子有望有效地传输激发能，前提是它们不会被结构上宽松的准分子所清除。我们报告了solution双酰亚胺（PBI）折叠二聚体的溶液自组装，该溶液表现出两个截然不同的动力学阶段：初始快速组装会导致亚稳态聚集体具有大的受激准分子贡献，然后缓慢释放稳定，扩展的游离H聚集体准分子。机理研究揭示了两个竞争性聚集途径的相互作用，其中抑制准分子直接与从等容性向协作性聚集的交叉联系。还讨论了如何通过折叠二聚体的构象柔韧性影响两个自组装途径之间的竞争。
更新日期：2017-07-13
中文翻译：
抑制Bi双酰亚胺折叠-二聚体H-聚集体中的准分子：二聚体构象和竞争装配途径的作用
H聚集体中的长寿命激子有望有效地传输激发能，前提是它们不会被结构上宽松的准分子所清除。我们报告了solution双酰亚胺（PBI）折叠二聚体的溶液自组装，该溶液表现出两个截然不同的动力学阶段：初始快速组装会导致亚稳态聚集体具有大的受激准分子贡献，然后缓慢释放稳定，扩展的游离H聚集体准分子。机理研究揭示了两个竞争性聚集途径的相互作用，其中抑制准分子直接与从等容性向协作性聚集的交叉联系。还讨论了如何通过折叠二聚体的构象柔韧性影响两个自组装途径之间的竞争。
京公网安备 11010802027423号