用于构建 CsPbBr3/Eu-MOF 复合材料的超支化 Eu-MOF 结构的简便合成及其作为比例荧光探针的应用,Journal of Materials Chemistry C

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用于构建 CsPbBr3/Eu-MOF 复合材料的超支化 Eu-MOF 结构的简便合成及其作为比例荧光探针的应用
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-01-24 , DOI: 10.1039/d2tc04879e
Wenwei Lai ₁ , Chuanli Wu _{1,

2} , Xiuxun Han _{1,

2}

Affiliation

CsPbBr ₃纳米晶体（NCs）由于其优异的光电性能，在各种光电应用中展现出巨大的潜力。然而，继承自离子晶体结构的稳定性差限制了它们的实际应用。因此，将 CsPbBr ₃ NC 与保护性和功能性材料结合以实现优异的性能是当前的研究挑战之一。在此，开发了 Eu-MOF 的三维超支化结构作为与 CsPbBr ₃ NC 耦合的有效框架。通过引入 Al(Ac) ₃以可控方式实现了丰富的 Eu-MOF 形貌，包括束状、哑铃状和海胆状添加剂。发现晶体分裂生长机制主导了分级 Eu-MOF 结构的形成，海胆状 Eu-MOF 随时间变化的形态演化证明了这一点。此外，酸性羧酸盐（如 Al(Ac) ₃、Zn(Ac) ₂、Pb(Ac) ₂、Cu(Ac) ₂、Ni(Ac) ₂）有效调节Eu-MOF晶体生长的分裂，这被认为是金属离子和乙酸根离子的协同作用。随后，一系列 CsPbBr ₃/Eu-MOF 复合材料是通过预先制备各种 Eu-MOF 超支化结构合成的，它们表现出优异的双发射光学性能。_{通过将CsPbBr 3}封装在三维超支化Eu-MOF结构中制备的比例荧光探针对DMF检测具有显着的灵敏度、良好的线性和高选择性。

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Facile synthesis of hyperbranched Eu-MOF structures for the construction of a CsPbBr3/Eu-MOF composite and its application as a ratiometric fluorescent probe

CsPbBr₃ nanocrystals (NCs) exhibit great potential for various optoelectronic applications due to their excellent optoelectrical properties. However, the poor stability inherited from the ionic crystal structure limits their practical applications. Hence, coupling CsPbBr₃ NCs with protective and functional materials for achieving superior properties is one of the current research challenges. Herein, three-dimensional hyperbranched structures of Eu-MOF were developed as effective frameworks coupled with CsPbBr₃ NCs. Rich Eu-MOF morphologies including sheaf-like, dumbbell-like, and urchin-like ones were achieved in a controllable way via introducing an Al(Ac)₃ additive. The crystal splitting growth mechanism was found to dominate the formation of hierarchical Eu-MOF structures, as evidenced by the time-dependent morphological evolution of an urchin-like Eu-MOF. In addition, acidic carboxylate salts (such as Al(Ac)₃, Zn(Ac)₂, Pb(Ac)₂, Cu(Ac)₂, Ni(Ac)₂) effectively modulate the splitting of Eu-MOF crystal growth, which is deemed to be the synergistic effect of metal ions and acetate ions. Subsequently, a series of CsPbBr₃/Eu-MOF composites were synthesized by pre-preparing various Eu-MOF hyperbranched structures, and they demonstrate excellent dual-emissive optical properties. A ratiometric fluorescence probe fabricated by encapsulating CsPbBr₃ in the three-dimensional hyperbranched Eu-MOF structure exhibits remarkable sensitivity, good linearity, and high selectivity for DMF detection.

更新日期：2023-01-24

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