Temperature-Tuning of Optical Properties and Molecular Aggregation in AnE-PVstat Copolymer Solution
Temperature-Tuning of Optical Properties and Molecular Aggregation in AnE-PVstat Copolymer Solution
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AnE-PVstat 共聚物溶液中光学性质和分子聚集的温度调节
DOI：
10.1021/acs.jpcc.7b10709
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发表时间：
2018
影响因子：
3.7
通讯作者：
Bouchrina
中科院分区：
文献类型：
--
作者：
Saaidia;Saidani;Ulbricht;Romdhane;Kästner;D. A. M;Schubert;Bouchrina
研究了含蒽的聚苯乙炔-丙氨酸-苯乙炔统计共聚物(ANE-PVstat)在溶液中的光学和形态性质的相关性。用吸光度和光致发光法研究了氯仿/氯苯(CF：CB)溶液中分子的聚集与温度的关系。在HJ聚集体模型框架下研究了0-0到0-1光致发光(PL)比随温度的变化，揭示了在室温下同时存在类H和类J行为。随着温度的升高，分子间的链间耦合作用减弱，导致H-聚集体解离。因此，促进了分子的扭转，降低了聚合物的平面性，降低了链内电子耦合。
The correlation between the optical and morphological properties of an anthracene-containing poly(phenylene ethynylene)-alt-(phenylenevinylene) statistical copolymer (AnE-PVstat) in solution has been investigated. As a function of temperature, the molecular aggregation in chloroform/chlorobenzene (CF:CB) solution was examined by means of absorbance and photoluminescence measurements. The study of the evolution of the 0–0 to the 0–1 photoluminescence (PL) ratio with temperature in the framework of the HJ-aggregate model unveiled the presence of both H- and J-like behaviors at room temperature. Upon increasing temperature, the interchain intermolecular coupling decreases, leading to a dissociation of H-aggregates. Hence, molecular torsions are facilitated, polymer planarity is reduced, and the intrachain electronic coupling decreases.