Fluorescent dyes bound to hydrophilic copolymers: Applications in aqueous halide sensing

Geddes, Chris D.; Douglas, Peter

doi:10.1002/(sici)1097-4628(20000502)76:5<603::aid-app1>3.0.co;2-6

Cited by 16 publications

(37 citation statements)

References 27 publications

(38 reference statements)

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“…(4) and amplitude weighted lifetimes were found to be 2.56 and 2.41 ns respectively. Interestingly, the low response of BAQBA towards aqueous halide can be attributed to its reduced mean lifetime as compared to other quinolinium type fluorophores [3,[28][29][30], noting the weak response towards aqueous Cl − , which could be particularly advantages when using BAQBA in physiological or environmental fluids.…”

Section: Resultsmentioning

confidence: 99%

“…Subsequently, there have been many halide sensitive probes derived from quinine derivatives, most notably using the quinolinium nucleus, which display a modest sensitivity for chloride due to its relatively long lifetime when quaternised that affords for chloride collisional quenching [3]. While the quinoline nucleus is only sparingly water soluble, its quaternised products are readily water-soluble and have subsequently been the transduction elements in many chloride/halide sensors [3,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

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Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Badugu

Lakowicz

Geddes

2004

Journal of Fluorescence

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Herein we report a set of new water-soluble fluorescent probes (N -boronobenzyl-6-aminoquinolinium bromides, BAQBAs) sensitive to aqueous fluoride. These probes shows spectral shifts and intensity changes in the presence of fluoride, in a wavelength ratiometric and colorimetric manner, enabling the detection of fluoride concentrations at visible wavelengths, in the concentration range ≈1-300 mM. Although the sensing mechanism is different for fluoride as compared to the other halides, we have tested the utility of these probes towards the other halides, and the results reveal that the BAQBAs are in fact potential candidates towards the sensing of the all the halides, but in different concentration ranges. As the probes are based on the boronic acid moiety, which is a well-known fluoride and sugar chelator group, we have investigated the response of sugars (such as glucose and fructose, which are present in biological fluids and foodstuffs) as interferences in fluoride detection using these probes. Interestingly, the BAQBAs show a suppressed sugar response potentially allowing for the predominant fluoride sensitivity. In addition to physiological sugars, we also have assessed the response of aqueous halides as potential interferents, or indeed analytes to be sensed, and show that the new boronic acid containing probes respond well to aqueous fluoride in the presence of a high background of other species, such as in a biological cocktail of 50 mM Glucose, 50 mM aqueous Chloride and 5 mM Fructose.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Badugu

Lakowicz

Geddes

2004

Journal of Fluorescence

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“…3) has been described previously [10,11]. The glass transition temperature (T g ) was 122 C, M n =91.8 k, and M w aM n =1.66.…”

Section: Preparation Of Quattromentioning

confidence: 99%

“…The magnitude of K SV depicts both the sensitivity of the sensor towards halide, and the detectable halide concentration range. A hydrophilic copolymer,``Quattro'' [10,11] has been chosen as the polymeric support for the halide sensitive¯uorophores. The copolymer (%50 mm dry) typically swells %100±200 mm in aqueous media, which is ideal for aqueous anion sensors.…”

Section: Introductionmentioning

confidence: 99%

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Quenching of Fluorescence

2006

Principles of Fluorescence Spectroscopy

212

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Two halide sensitive acridinium¯uorophores have been synthesised and immobilised in a hydrophilic copolymer. Thin ®lms of the copolymers swell in aqueous media allowing dye¯uorescence to be dynamically quenched by the di usion of halide ions. The new sensor ®lms have been characterised in terms of their sensitivity and selectivity towards halide and are compared to ®lms containing both bound and unbound Rhodamine B. The sensor ®lms are reversibly capable of determining halide ions at mildly alkaline pH with typical 90% response times of % 1±2 min. The sensor ®lms are cheap to produce, can readily be coated on disposable glass microscope slides or on the tip of a ®bre optic bundle and have a shelf life in excess of 2 years. #

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Recent Advances in Luminescent Recognition and Chemosensing of Iodide in Water

Valdes‐García

Rosales‐Vázquez

Bazany‐Rodríguez

et al. 2020

Chemistry An Asian Journal

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This Minireview covers the latest developments of chemosensors based on transition-metal receptors and organic fluorophores with specific binding sites for the luminescent detection and recognition of iodide in aqueous media and real samples. In all selected examples within the last decade (made-post 2010), the iodide sensing and recognition is probed by monitoring real-time changes of the fluorescence or phosphorescence properties of the chemosensors. This review highlights effective strategies to iodide sensing from a structural approach where the iodide recognition/sensing process, through supramolecular interactions as coordination bonds, hydrogen bonds, halogen bonds and electrostatic interactions, is transduced into an optical change easily measurable. The selective iodide sensing is an active field of research with global interest due to the importance of iodide in biological, medicinal, industrial, environmental and chemical processes.

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Fluorescent dyes bound to hydrophilic copolymers: Applications in aqueous halide sensing

Cited by 16 publications

References 27 publications

Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Wavelength–Ratiometric Probes for the Selective Detection of Fluoride Based on the 6-Aminoquinolinium Nucleus and Boronic Acid Moiety

Quenching of Fluorescence

Recent Advances in Luminescent Recognition and Chemosensing of Iodide in Water

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