Schyns Zoé O G, Bennett Thomas M, Davison Gemma E, Shaver Michael P
Department of Materials, School of Natural Sciences, University of Manchester, Manchester M13 9BL, United Kingdom.
Sustainable Materials Innovation Hub, Henry Royce Institute, University of Manchester, Manchester M13 9BL, United Kingdom.
ACS Appl Polym Mater. 2024 Jan 31;6(3):2031-2040. doi: 10.1021/acsapm.4c00090. eCollection 2024 Feb 9.
Fluorophores displaying concentration-dependent luminescence are becoming increasingly valuable in stress-sensing, tagging, and dyeing applications, including the quantification of recycled content in plastic packaging. In this work, we investigate the effects of the polymer matrix, dye structure, and crystallinity on aggregation-induced enhanced emission (AIEE). We demonstrate that the aggregation threshold required for successful quantification can be adjusted through modulation of guest-host (dye-polymer) interactions and monitored using an array of fluorescence characterization. Modification of guest-host interactions is realized through choice of host, change of guest, and tuning of the crystallinity of the host system. Increasing the number of guest-host interactions and solubility between guest and host, loosely predicted through the calculation of the solubility parameter, increases the aggregation threshold relative to other low-polarity and low-interacting systems. We demonstrate that issues, such as loading level and cost, associated with high aggregation thresholds, can be circumvented by increasing system crystallinity, improving spectral intensities, and subsequent quantification. These insights explore the fundamental understanding of supramolecular interactions that govern dye-polymer systems.
具有浓度依赖性发光的荧光团在应力传感、标记和染色应用中变得越来越有价值，包括塑料包装中回收成分的定量分析。在这项工作中，我们研究了聚合物基质、染料结构和结晶度对聚集诱导增强发射（AIEE）的影响。我们证明，通过调节客体-主体（染料-聚合物）相互作用，可以调整成功定量所需的聚集阈值，并使用一系列荧光表征方法进行监测。客体-主体相互作用的修饰是通过选择主体、改变客体以及调节主体系统的结晶度来实现的。通过计算溶解度参数大致预测，增加客体-主体相互作用的数量以及客体与主体之间的溶解度，相对于其他低极性和低相互作用系统，会提高聚集阈值。我们证明，与高聚集阈值相关的诸如负载水平和成本等问题，可以通过提高系统结晶度、改善光谱强度以及后续定量分析来规避。这些见解探索了对支配染料-聚合物系统的超分子相互作用的基本理解。
