A Tb3+ ion encapsulated anionic indium-organic framework as logical probe for distinguishing quenching Fe3+ and Cu2+ ions.

Tb3 离子封装的阴离子铟有机骨架作为区分猝灭 Fe3 和 Cu2 离子的逻辑探针。

• 影响指数: 4.831
• 发表时间: 2024 Jan 5
• 来源期刊: Spectrochim Acta A Mol Biomol Spectrosc
• DOI: 10.1016/j.saa.2023.123388
• PMID: 37714105
• 文章类型: Journal Article
• 作者列表: Wang B,Zheng W,Chen J,Wang Y,Duan X,Ma S,Kong Z,Xia T

关键词: Dual sensing for Fe(3+) and Cu(2+); Fluorescent sensor; Molecular logic gate; Tb(3+)-encapsulated anionic MOFs

Abstract

We successfully synthesized a stable anionic microporous metal-organic framework (MOF) HDU-1 ([Me2NH2]2In2[(TATAB)4(DMF)4](DMF)4(H2O)4) and constructed a fluorescent probe Tb@HDU-1 by an exchange strategy. Because of its suspension distinct fluorescent response of Tb(III) characteristic transition and ligand emission, the Tb@HDU-1 can be used as fluorescent probe for sensing towards Fe3+ and Cu2+ ions. It is surprising that Tb@HDU-1 is used as a ratiometric fluorescent probe for Cu2+ ions while only single peak detection for Fe3+ ions, which describes a particular rare example of a sensor based on Ln-MOFs to distinguish quenching Fe3+ and Cu2+ ions. Hence we designed a molecular logic gate device for making the distinction of Fe3+ and Cu2+ ions more clearly and appropriately. In addition, the different quenching effect between Fe3+ and Cu2+ ions may be ascribed to the differences of competitive absorption and interaction between frameworks and metal ions.

摘要

我们成功合成了稳定的阴离子微孔金属-有机骨架(MOF)HDU-1([Me2NH2]2In2[(TATAB)4(DMF)4](DMF)4(H2O)4),并通过交换策略构建了荧光探针Tb@HDU-1。因为其悬浮的Tb(Ⅲ)特征跃迁和配体发射的荧光响应明显,Tb@HDU-1可以用作荧光探针，用于检测Fe3和Cu2离子。令人惊讶的是，Tb@HDU-1被用作Cu2+离子的比率荧光探针，而对Fe3+离子仅有单峰检测，其中描述了基于Ln-MOF的传感器的特定罕见示例，以区分猝灭的Fe3和Cu2离子。因此，我们设计了一种分子逻辑门器件，以使Fe3和Cu2离子的区分更加清晰和适当。此外,Fe3和Cu2离子之间的不同猝灭作用可能归因于骨架与金属离子之间的竞争吸收和相互作用的差异。