Controlling the Movability and Excimer Formation of Functional Organic Molecules
Controlling the Movability and Excimer Formation of Functional Organic Molecules
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DOI：
10.1246/bcsj.20220107
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发表时间：
2022-07-01
影响因子：
4
通讯作者：
Tohnai, Norimitsu
中科院分区：
文献类型：
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作者：
Akai, Ryota;Oka, Kouki;Tohnai, Norimitsu
受激准分子是由两个p共轭荧光团分子组成的激发二聚体复合物，其中一个处于基态，另一个处于激发态。在固体状态下，激基缔合物发射的强度，这主要是由激发的二聚体的形成，在很大程度上取决于受激的p-共轭分子的可动性。在这项研究中，我们报告，有机盐组成的二磺酸与一个共同的p-共轭分子，2，2 '-bithiophene（BT），可以作为功能性的激基缔合物部分，而线性烷基胺可以用作控制部分。此外，我们发现，通过固定BT部分可以显著改变准分子发射的强度，这可以通过烷基的相互作用（即，锚效应）。在不改变固态有机功能分子结构和排列的情况下，揭示了π共轭分子的可动性与激基缔合物发射强度之间的实验关系。
An excimer is an excited dimer complex made of two pconjugated fluorophore molecules such that one is in the ground, and the other in the excited state. In the solid state, the intensity of the excimer emission, which is mainly caused by the formation of the excited dimer, heavily depends on the movability of the excited p-conjugated molecule. In this study, we report that organic salts composed of disulfonic acid with a common p-conjugated molecule, 2,2'-bithiophene (BT), can act as functional excimer moieties, while linear alkylamines may be used as arrangement-controlling moieties. Furthermore, we found that the intensity of the excimer emission can be drastically changed by fixing the BT moiety, which can be achieved via the interaction of the alkyl groups (i.e., the anchor effect). The experimental relationship between the movability of the pi-conjugated molecule and the intensity of the excimer emission was revealed without changing the structure and arrangement of the functional organic molecules in the solid state.