The design and synthesis of high-efficiency electrochemiluminescence (ECL) emitters hold great promise for a wide range of analytical applications. In this study, we developed a rapid and straightforward strategy to fabricate a self-luminous Cd-based metal–organic framework (Cd-MOF) using individual aggregation-induced emission ligands, specifically 1,1,2,2-tetrakis(4-(pyridin-4-yl)phenyl)ethane (TPPE), within a few seconds. The rigid and directionally enriched metal node of Cd, along with the organic ligands, is formed within the Cd-MOF via coordination, effectively constraining the intramolecular free motions of TPPE and suppressing nonradiative relaxation. Additionally, the unique porous structure combined with the catalytic activity resulting from the incorporation of Cd²⁺, endow the Cd-MOF with 90-fold ECL enhancement compared to individual TPPE as more chromophores are electro-excited and more coreactants are catalyzed to produce luminescence. The as-made Cd-MOF amplifies the ECL performance by integrating ECL emitters and coreactant accelerators into a single entity, simplifying the sensing process. Leveraging the excellent ECL performance, we constructed a sensitive ECL sensor for hydroquinone based on competitive reactions, with a wide linear range from 200 nM to 1 mM and a satisfying detection limit as low as 80 nM.

中文翻译：

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使用 AIEgen 配体快速制备自发光 cd 基金属有机框架，用于高性能电化学发光


高效电化学发光 （ECL） 发射器的设计和合成为广泛的分析应用带来了巨大的前景。在这项研究中，我们开发了一种快速而直接的策略，使用单个聚集诱导的发射配体，特别是 1,1,2,2-四（4-（吡啶-4-基）苯基）乙烷 （TPPE），在几秒钟内制造自发光 Cd 基金属有机框架 （Cd-MOF）。Cd 的刚性和定向富集金属节点以及有机配体通过配位在 Cd-MOF 内形成，有效地限制了 TPPE 的分子内自由运动并抑制了非辐射弛豫。此外，独特的多孔结构与掺入 Cd²⁺ 产生的催化活性相结合，使 Cd-MOF 的 ECL 增强比单个 TPPE 高 90 倍，因为更多的发色团被电激发，更多的共反应物被催化产生发光。成品 Cd-MOF 通过将 ECL 发射器和共反应加速器集成到单个实体中来放大 ECL 性能，从而简化了传感过程。利用优异的 ECL 性能，我们基于竞争性反应构建了一种灵敏的对苯二酚 ECL 传感器，线性范围从 200 nM 到 1 mM，检测限低至 80 nM，令人满意。