Exciton Coupling Enhancement in the Relaxed Excited State
Exciton Coupling Enhancement in the Relaxed Excited State
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DOI：
10.1021/acs.jpcc.8b03337
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发表时间：
2018-06-07
影响因子：
3.7
通讯作者：
Lambert, Christoph
中科院分区：
文献类型：
--
作者：
Auerhammer, Nina;Schmiedel, Alexander;Lambert, Christoph
本工作的重点是方酸-bodipy染料共轭物的稳态和光诱导动态光学性质。虽然染料缀合物的平方吸收跃迁矩可以以相加的方式追溯到缀合物的成分，但这对于平方荧光跃迁矩是不可能的。我们建议在放松的激发态的电子耦合的增强负责这一观察。飞秒时间分辨率的瞬态吸收和荧光上转换实验深入了解染料共轭物的弛豫现象，特别是关于激子流形内的弛豫。
The steady-state and photoinduced dynamical optical properties of two squaraine-bodipy dye conjugates are the focus of this work. While the squared absorption transition moments of the dye conjugates can be traced back in an additive way to the constituents of the conjugates, this is not possible for the squared fluorescence transition moments. We suggest an enhancement of electronic coupling in the relaxed excited state to be responsible for this observation. Transient absorption and fluorescence upconversion experiments with femtosecond-time resolution give insight into the relaxation phenomena of the dye conjugates, in particular concerning the relaxation within the exciton manifold.