The role of the dipolar neighborhood on the relaxation dynamics of multichromophoric merocyanines.

The role of the dipolar neighborhood on the relaxation dynamics of multichromophoric merocyanines.
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偶极邻域对多发色部花青弛豫动力学的作用

DOI:
10.1039/c6cp02437h
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发表时间:
2016
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
通讯作者:
T. Brixner
T. Brixner
中科院分区:
--
文献类型:
--
作者:
F. Koch;A. Steinbacher;C. Consani;A. Zitzler-Kunkel;M. Stolte;F. Würthner;T. Brixner

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分子系统中不同发色团之间的相互作用对于理解弛豫动力学至关重要,无论是处理小分子还是更大的系统,如聚合物或聚集体。我们研究了一系列包含一个,两个或三个高度偶极(μg = 13.1 D)染料的mercury分子,以研究相互作用的影响和起源,例如,电子的、振动的或激子的形成。弛豫动力学探测通过瞬态吸收和相干二维光谱。此外,我们推导出一个一般的弛豫模型,可以适用于所有部花青的调查,并可以作为其他偶极供体受体染料的参考点。分子内的电荷转移状态的单体汞是稳定的偶极相邻分子的双和三发色团染料。
The interactions between different chromophores within a molecular system are crucial to comprehend relaxation dynamics, regardless if one deals with small molecules or larger systems like polymers or aggregates. We investigate a series of merocyanine molecules that contain one, two or three highly dipolar (μg = 13.1 D) dyes in close vicinity to study the influence and origin of interactions, e.g., electronic, vibronic, or the formation of excitons. Relaxation dynamics are probed via transient absorption and coherent two-dimensional spectroscopy. Furthermore, we derive a general relaxation model which can be applied for all merocyanines under investigation and can be used as a reference point for other dipolar donor–acceptor dyes. The intramolecular charge-transfer state of the monomeric merocyanine is stabilized by dipolar neighbor molecules in the bis- and tris-chromophoric dyes.
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