Luminescent sensing of Hg²⁺ ions using MOF-808 combined with Au25@BSA nanoclusters

IF 5.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Research Bulletin Pub Date : 2025-02-22 DOI:10.1016/j.materresbull.2025.113397

L.G. Barbata , M. Mazaj , R. Ettlinger , G. Ficarra , P. Castronovo , A. Sciortino , F. Messina , R.E. Morris , G. Buscarino

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Abstract

The detection of Hg²⁺ ions in aqueous environments is crucial due to their environmental toxicity and potential health risks. In this study, we present a novel luminescent sensor based on Metal-Organic Framework MOF-808 functionalized with Au₂₅@BSA gold nanoclusters (AuNCs) for the highly sensitive detection of trace Hg²⁺ ions. MOF-808, known for its robust structure and versatile chemical environment, provides an ideal platform for incorporating gold nanoclusters that exhibit unique optical properties. The integration of Au₂₅@BSA in MOF-808 framework enhances the temporal and thermal stability of the gold nanoclusters while preserving their photoluminescence properties. The MOF-808/Au₂₅@BSA composite behaves as a sensor relying on the quenching effect of Hg²⁺ on the luminescence of the gold nanoclusters embedded within the MOF matrix, offering a highly selective and sensitive detection method at concentrations as low as nM levels. Comprehensive characterizations of the MOF-808/Au₂₅@BSA composite were conducted. This sensor demonstrates remarkable performance with high sensitivity, selectivity, and stability, making it a promising tool for environmental monitoring and analysis. This work highlights the potential of MOF-based luminescent sensors combined with gold nanoclusters in advancing the field of sensing applications.

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MOF-808结合Au25@BSA纳米团簇对Hg +离子的发光传感

由于其环境毒性和潜在的健康风险，在水环境中检测Hg 2 +离子至关重要。在这项研究中，我们提出了一种基于Au25@BSA金纳米团簇（aunc）功能化的金属有机框架MOF-808的新型发光传感器，用于高灵敏度检测微量Hg 2 +离子。MOF-808以其坚固的结构和通用的化学环境而闻名，为整合具有独特光学特性的金纳米团簇提供了理想的平台。在MOF-808框架中集成Au25@BSA增强了金纳米团簇的时间和热稳定性，同时保持了其光致发光性能。MOF-808/Au25@BSA复合材料作为传感器，依靠Hg 2⁺对嵌入MOF基体中的金纳米团簇发光的猝灭效应，在低至nM水平的浓度下提供高选择性和灵敏度的检测方法。对MOF-808/Au25@BSA复合材料进行了综合表征。该传感器具有较高的灵敏度、选择性和稳定性，是一种很有前途的环境监测和分析工具。这项工作强调了基于mof的发光传感器结合金纳米团簇在推进传感领域应用方面的潜力。

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来源期刊

Materials Research Bulletin 工程技术-材料科学：综合

CiteScore

9.80

自引率

5.60%

发文量

372

审稿时长

42 days

期刊介绍： Materials Research Bulletin is an international journal reporting high-impact research on processing-structure-property relationships in functional materials and nanomaterials with interesting electronic, magnetic, optical, thermal, mechanical or catalytic properties. Papers purely on thermodynamics or theoretical calculations (e.g., density functional theory) do not fall within the scope of the journal unless they also demonstrate a clear link to physical properties. Topics covered include functional materials (e.g., dielectrics, pyroelectrics, piezoelectrics, ferroelectrics, relaxors, thermoelectrics, etc.); electrochemistry and solid-state ionics (e.g., photovoltaics, batteries, sensors, and fuel cells); nanomaterials, graphene, and nanocomposites; luminescence and photocatalysis; crystal-structure and defect-structure analysis; novel electronics; non-crystalline solids; flexible electronics; protein-material interactions; and polymeric ion-exchange membranes.