Achieving efficient charge transfer remains a significant challenge for thermally activated delayed fluorescence (TADF) materials that rely on through-space charge transfer (TSCT). In this study, we successfully applied a novel donor–acceptor pair characterized by non-exclusive charge transfer to TSCT-based TADF polymers. We propose a supramolecular strategy to optimize charge transfer by regulating the spatial arrangement of the donor–acceptor pairs. As the order of these pairs increases, localized emission from monomers is gradually quenched, ultimately resulting in pure orange emission. Photophysical studies reveal that improved spatial order accelerates the reverse intersystem crossing process, thereby enhancing the radiative transition rate of TADF emission and enabling efficient TSCT. This research offers a feasible method for designing TSCT-TADF materials. The resulting supramolecular systems with ordered configurations exhibit excellent energy and charge transfer performance, indicating their potential applications in optoelectronic devices, bioimaging, photodynamic therapy, and other fields.

中文翻译：

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超分子方法可在具有纯橙色发射的热激活延迟荧光材料中实现有效的空间电荷转移


对于依赖通过空间电荷转移 （TSCT） 的热激活延迟荧光 （TADF） 材料来说，实现高效的电荷转移仍然是一项重大挑战。在这项研究中，我们成功地将一种以非排他电荷转移为特征的新型供体-受体对应用于基于 TSCT 的 TADF 聚合物。我们提出了一种超分子策略，通过调节供体-受体对的空间排列来优化电荷转移。随着这些对的顺序增加，单体的局部发射逐渐猝灭，最终导致纯橙发射。光物理研究表明，改进的空间有序加速了反向系统间交叉过程，从而提高了 TADF 发射的辐射跃迁速率并实现了高效的 TSCT。本研究为设计 TSCT-TADF 材料提供了一种可行的方法。所得的具有有序构型的超分子系统表现出优异的能量和电荷转移性能，表明它们在光电器件、生物成像、光动力治疗等领域的潜在应用。