Novel lanthanide nanoparticle frameworks for highly efficient photoluminescence and hypersensitive detection,Chemical Science

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Novel lanthanide nanoparticle frameworks for highly efficient photoluminescence and hypersensitive detection
Chemical Science ( IF 7.6 ) Pub Date : 2022-11-18 , DOI: 10.1039/d2sc05915k
Yuan-Jun Tong ₁ , Lu-Dan Yu ₁ , Nan Li ₁ , Minhui Shen ₁ , Xiaoru Peng ₁ , Huangsheng Yang ₁ , Yu-Xin Ye ₁ , Fang Zhu ₁ , Janusz Pawliszyn ₂ , Jianqiao Xu ₁ , Gangfeng Ouyang _{1,

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Affiliation

Despite the excellent luminescent properties of lanthanide clusters (LnCs), their suprastructures that inherit their characteristic luminescent properties are scarcely reported. Herein, novel and highly luminescent suprastructures are synthesized via a two-step assembly method to incorporate LnCs in covalent organic frameworks (COFs). COFs are pre-synthesized and decorated with rigid anchoring groups on their nanochannel walls, which provide one-dimensional confined spaces for the subsequent in situ assembly of luminescent LnCs. The confined LnCs are termed nanoparticles (NPs) to distinguish them from the pure LnCs. Secondary micropores with predictable sizes are successfully formed between the walls of the nanochannels and the orderly aligned NPs therein. By using a small organic ligand that can efficiently sensitize Ln(III) cations in the assembly processes, the obtained composites show high quantum yields above 20%. The fluorescence can even be effectively maintained across nine pH units. The secondary micropores further enable the unambiguous discrimination of six methinehalides and ultrasensitive detection of uranyl ions. This study provides a new type of luminescent material that has potential for sensing and light emitting.

中文翻译：

用于高效光致发光和超灵敏检测的新型镧系元素纳米粒子框架

尽管镧系元素团簇 (LnCs) 具有出色的发光特性，但其继承其特征发光特性的超结构却鲜有报道。在此，通过两步组装法将 LnCs 结合到共价有机框架 (COFs)中，合成了新颖且高发光的超结构。COF 是预先合成的，并在其纳米通道壁上装饰有刚性锚定基团，为后续的原位制备提供了一维密闭空间发光 LnC 的组装。限制的 LnC 被称为纳米粒子 (NPs)，以将它们与纯 LnC 区分开来。在纳米通道壁和其中有序排列的 NP 之间成功形成了具有可预测尺寸的二次微孔。通过使用可在组装过程中有效敏化 Ln( III ) 阳离子的小型有机配体，获得的复合材料显示出超过 20% 的高量子产率。甚至可以在九个 pH 单位内有效地保持荧光。二级微孔进一步使六种次甲基卤化物的明确区分和铀酰离子的超灵敏检测成为可能。该研究提供了一种具有传感和发光潜力的新型发光材料。

更新日期：2022-11-18

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