Morphology Control of Zr-Based Luminescent Metal-Organic Frameworks for Aflatoxin B1 Detection

Metal-organic frameworks (MOFs) have gained significant prominence as sensing materials owing to their unique properties. However, understanding the correlation between the morphology, properties, and sensing performance in these MOF-based sensors remains a challenge, limiting their applications and...

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Bibliographic Details
Published in:Biosensors (Basel) 2024-05, Vol.14 (6), p.273
Main Authors: Zhu, Fang, Chai, Qiuxue, Xiong, Dinghui, Zhu, Nuanfei, Zhou, Jialong, Wu, Ruoxi, Zhang, Zhen
Format: Article
Language:English
Subjects:
Acids
Aflatoxin B1
Aflatoxin B1 - analysis
Aflatoxins
Benzoic acid
Biosensing Techniques
Communication
fluorescence
Fourier transforms
Limit of Detection
Luminescence
Metal-organic frameworks
Metal-Organic Frameworks - chemistry
Morphology
Physical characteristics
Polymers
rapid detection
Sensors
Spectrum analysis
Structural stability
Zirconium
Zirconium - chemistry
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Summary:Metal-organic frameworks (MOFs) have gained significant prominence as sensing materials owing to their unique properties. However, understanding the correlation between the morphology, properties, and sensing performance in these MOF-based sensors remains a challenge, limiting their applications and potential for improvement. In this study, Zr-MOF was chosen as an ideal model to explore the impact of the MOF morphology on the sensing performance, given its remarkable stability and structural variability. Three luminescent MOFs (namely rod-like Zr-LMOF, prismoid-like Zr-LMOF, and ellipsoid-like Zr-LMOF) were synthesized by adjusting the quantities of the benzoic acid and the reaction time. More importantly, the sensing performance of these Zr-LMOFs in response to aflatoxin B1 (AFB1) was thoroughly examined. Notably, the ellipsoid-like Zr-LMOF exhibited significantly higher sensitivity compared to other Zr-LMOFs, attributed to its large specific surface area and pore volume. Additionally, an in-depth investigation into the detection mechanism of AFB1 by Zr-LMOFs was conducted. Building upon these insights, a ratiometric fluorescence sensor was developed by coordinating Eu with ellipsoid-like Zr-LMOF, achieving a remarkably lower detection limit of 2.82 nM for AFB1. This study contributes to an improved comprehension of the relationship between the MOF morphology and the sensing characteristics while presenting an effective approach for AFB1 detection.
ISSN:2079-6374
2079-6374
DOI:10.3390/bios14060273