Fluorescent and colorimetric dual-mode recognition of Al3+ in tablets based on chrome azurol S and pH-switchable boron, nitrogen co-doped carbon dots

IF 5.3 2区化学 Q1 CHEMISTRY, ANALYTICAL Microchimica Acta Pub Date : 2024-10-29 DOI:10.1007/s00604-024-06776-5

Liping Lin, Meng Fang, Yaojia Lin, Jinye Zhang, Wei Liu, Malin Cui

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Abstract

The synthesis and characterization of pH-sensitive boron and nitrogen co-doped CDs (B, N-CDs) is reported. The fluorescence of B, N-CDs exhibited pH-responsive behavior within the range pH 3.0–6.0, attributed to their controlled aggregation and disaggregation. Interestingly, the fluorescence of B, N-CDs was quenched by the inner filter effect from chrome azurol S (CAS). With the subsequent addition of Al³⁺, the fluorescence of B, N-CDs was restored due to the formation of blue Al³⁺-CAS and B, N-CDs-Al³⁺ complexes. Consequently, a fluorescent and colorimetric dual-mode sensor for Al³⁺ detection was developed. The proposed sensor enabled Al³⁺ detection in the ranges and limits of detection of 3.75–22.5 μM and 2.67 μM for the fluorescent mode and 5–20 μM and 4.8 μM for the colorimetric mode, respectively. Furthermore, the efficacy of the sensor was validated through successful detection of Al³⁺ in tablet samples. The obtained B, N-CDs promised the application in acid condition and the proposed sensor is expected to be applied to in situ on-line detection of Al³⁺.

Graphical Abstract

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基于铬偶氮呋喃 S 和 pH 值可切换的硼、氮共掺杂碳点的片剂中 Al3+ 的荧光和比色双模式识别。

报告了对 pH 值敏感的硼氮共掺杂 CD（B，N-CDs）的合成和表征。B, N-CDs 的荧光在 pH 3.0-6.0 范围内表现出 pH 响应行为，这归因于它们的可控聚集和解聚。有趣的是，B, N-CDs 的荧光被铬氮脲 S（CAS）的内滤效应淬灭。随后加入 Al3+，由于形成了蓝色的 Al3+-CAS 和 B, N-CDs-Al3+ 复合物，B, N-CDs 的荧光得以恢复。因此，一种用于检测 Al3+ 的荧光和比色双模式传感器应运而生。该传感器的荧光检测范围和检测限分别为 3.75-22.5 μM 和 2.67 μM，比色检测范围和检测限分别为 5-20 μM 和 4.8 μM。此外，还通过成功检测片剂样品中的 Al3+ 验证了传感器的功效。所获得的 B、N-CDs 可在酸性条件下应用，所提出的传感器有望应用于 Al3+ 的原位在线检测。

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来源期刊

Microchimica Acta 化学-分析化学

CiteScore

9.80

自引率

5.30%

发文量

410

审稿时长

2.7 months

期刊介绍： As a peer-reviewed journal for analytical sciences and technologies on the micro- and nanoscale, Microchimica Acta has established itself as a premier forum for truly novel approaches in chemical and biochemical analysis. Coverage includes methods and devices that provide expedient solutions to the most contemporary demands in this area. Examples are point-of-care technologies, wearable (bio)sensors, in-vivo-monitoring, micro/nanomotors and materials based on synthetic biology as well as biomedical imaging and targeting.