Fluorescent Sensing Techniques for Phosphate Ions
Summary
Fluorescent sensing of phosphate ions has emerged as a powerful approach for the rapid, sensitive and selective detection of phosphates in environmental, biological and industrial settings. Such techniques exploit fluorescent probes—ranging from small organic molecules and metal‐complex luminophores to nanoscale materials—to transduce phosphate binding into measurable optical signals. Common signal modalities include turn-off or turn-on fluorescence, ratiometric emission changes and aggregation-induced luminescence. Advances in probe design have focused on enhancing binding affinity and selectivity for phosphate species in the presence of competing anions, optimising quantum yield and minimising background autofluorescence. Integration with portable platforms, including smartphone-based read-out and microfluidic chips, has further extended practical applications in real-time water monitoring and point-of-care diagnostics of serum phosphate levels. Globally, reliable phosphate sensing addresses challenges in wastewater management, eutrophication control, agricultural fertiliser monitoring and clinical evaluation of disorders of phosphate homeostasis.
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Fluorescent Sensing Techniques for Phosphate Ions publication trend
The graph below shows the total number of articles in fluorescent sensing techniques for phosphate ions across all publications each year (not limited to Nature Index journals).
Technical terms
Fluorophore: A molecule or molecular assembly that emits light upon excitation, used as the signal transducer in fluorescence sensing.
Ratiometric fluorescence: A sensing strategy in which the ratio of two emission intensities at distinct wavelengths provides an internal reference, improving quantitative accuracy.
Turn-off/turn-on sensor: A probe that exhibits fluorescence quenching (“turn-off”) or enhancement (“turn-on”) upon analyte binding.
Nanocluster: A nanoscale assembly of metal atoms or ions, often stabilised by ligands, with distinctive fluorescence properties useful for sensing applications.
Aggregation-Induced Emission (AIE): A phenomenon in which non-emissive molecules become highly fluorescent upon forming aggregates, exploited for sensitive detection of target analytes.
References
- Porphin-Based Carbon Dots for “Turn Off–On” Phosphate Sensing and Cell Imaging. Nanomaterials (2020).
- Rapid Detection of Sodium Hexametaphosphate by Visualization of Ratiometric Fluorescent Probes Based on Carbon Dots and Copper Nanoclusters. Academic Journal of Science and Technology (2023).
- Polyacrylate-calcium (cerium) Nanocluster Fluorescent Probes for Quantitative Detection of Inorganic Phosphorus. Journal of Inorganic Materials (2024).
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