Precisely engineered dual-antenna europium MOF with intrinsic dual-state luminescence for sensitive dexamethasone sensing

IF 4.6 2区化学 Q1 SPECTROSCOPY

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy Pub Date : 2025-06-24 DOI:10.1016/j.saa.2025.126598

Sameera Sh. Mohammed Ameen , Faisal K. Algethami , Khalid M. Omer

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引用次数: 0

Abstract

Dual-emitting combined with dual-mode detection holds great importance in variety of luminescence-based applications. The dual-emitting property of a single metal-organic framework (MOF) is highly attractive due to its stability and the ability to achieve dual emission without requiring additional fluorophores. In this study, a novel dual-emitting dual-state bi-ligand Eu-based MOF (BiL-Eu-MOF) was synthesized exploiting dual-antenna effect. The dual-antenna effect, achieved through precise tuning of the ligands' energy levels in alignment with the empty ⁵D₀ orbitals of Eu³⁺ ions, significantly enhances charge transfer from the ligands to the metal center, resulting in intensified emission. In this regard, dexamethasone (DX) quenches the red emission, while the blue emission remained slightly affected. This phenomenon, led us to design ratiometric-tonality platform for detection of DX using conventional fluorometry and fluorescence tonality visual-based mode. The intrinsic dual-emitting properties of BiL-Eu-MOF enable stable, recyclable, and selective on-site detection DX without the need for encapsulation or functionalization.

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精确设计的双天线铕MOF，具有固有的双态发光，用于敏感的地塞米松传感

双发射与双模检测相结合在各种基于发光的应用中具有重要意义。单金属有机骨架（MOF）的双发射特性由于其稳定性和无需额外荧光团即可实现双发射的能力而具有很高的吸引力。本研究利用双天线效应合成了一种新型双发射双态双配体铕基MOF （BiL-Eu-MOF）。通过精确调整配体的能级与Eu3+离子的空5D0轨道对齐，实现了双天线效应，显著增强了从配体到金属中心的电荷转移，从而增强了发射。在这方面，地塞米松（DX）熄灭了红色发射，而蓝色发射仍然受到轻微影响。这一现象促使我们设计了比值调性平台，使用传统的荧光法和基于荧光调性的视觉模式来检测DX。bill - eu - mof固有的双发射特性使其无需封装或功能化即可实现稳定、可回收和选择性的现场检测DX。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 物理-光谱学

CiteScore

8.40

自引率

11.40%

发文量

1364

审稿时长

40 days

期刊介绍： Spectrochimica Acta, Part A: Molecular and Biomolecular Spectroscopy (SAA) is an interdisciplinary journal which spans from basic to applied aspects of optical spectroscopy in chemistry, medicine, biology, and materials science. The journal publishes original scientific papers that feature high-quality spectroscopic data and analysis. From the broad range of optical spectroscopies, the emphasis is on electronic, vibrational or rotational spectra of molecules, rather than on spectroscopy based on magnetic moments. Criteria for publication in SAA are novelty, uniqueness, and outstanding quality. Routine applications of spectroscopic techniques and computational methods are not appropriate. Topics of particular interest of Spectrochimica Acta Part A include, but are not limited to: Spectroscopy and dynamics of bioanalytical, biomedical, environmental, and atmospheric sciences, Novel experimental techniques or instrumentation for molecular spectroscopy, Novel theoretical and computational methods, Novel applications in photochemistry and photobiology, Novel interpretational approaches as well as advances in data analysis based on electronic or vibrational spectroscopy.