Cyano-substituted oligo(p-phenylene-vinylene)s having linear and branched octyloxy groups: control of aggregation and emission properties via C8 alkyl chain difference,Molecular Systems Design & Engineering

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Cyano-substituted oligo(p-phenylene-vinylene)s having linear and branched octyloxy groups: control of aggregation and emission properties via C8 alkyl chain difference
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2021-5-25 , DOI: 10.1039/d1me00020a
Shotaro Hayashi _{1,

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Affiliation

We report the control of solid-state emission properties of cyano-substituted oligo(p-phenylene-vinylene)s, COPVs, via C8 alkyl chain. COPVs having C₈H₁₇O–, n-octyloxy and 2-ethylhexyloxy, groups were synthesized by Knoevenagel condensation. The alkyl (alkoxy) chains attached to COPV did not influence the optical properties in solution but affected the solid-state properties. In the solid-state, COPV with branched alkyl chains showed lower energy emission than COPV with linear alkyl chains at both sides. Alkyl chain structures induced the tuning of H- and J-aggregation, resulting in different solid-state optical properties. The macrostructure of the COPVs showed different aggregation behaviors depending on the alkyl chains present.

中文翻译：

具有直链和支链辛氧基的氰基取代低聚（对亚苯基-亚乙烯基）：通过 C8 烷基链差异控制聚集和发射特性

我们报告了通过C8 烷基链控制氰基取代的低聚（对亚苯基-亚乙烯基）、COPV的固态发射特性。通过 Knoevenagel 缩合合成了具有 C ₈ H ₁₇ O-、正辛氧基和 2-乙基己氧基的 COPV。连接到 COPV 的烷基（烷氧基）链不影响溶液中的光学性质，但影响固态性质。在固态下，具有支链烷基链的 COPV 显示出比两侧具有线性烷基链的 COPV 更低的能量发射。烷基链结构诱导H - 和J的调谐-聚集，导致不同的固态光学特性。根据存在的烷基链，COPV 的宏观结构显示出不同的聚集行为。

更新日期：2021-06-10

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