Fluorescein filled photonic crystal fiber sensor for simultaneous ultraviolet light and temperature monitoring

Tatár, Peter; Kacik, Daniel; Tarjányi, Norbert

doi:10.1016/j.yofte.2016.01.010

Cited by 9 publications

(3 citation statements)

References 12 publications

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“…Based on the CV, DP and SW voltammetry data, besides FLSC structure and chemical properties , a tentative oxidation mechanism of FLSC was proposed. The electroxidation reaction occurs in two steps, Scheme .…”

Section: Resultsmentioning

confidence: 99%

“…Fluorescein (3′,6′‐dihydroxyspiro[isobenzofuran‐1(3H),9′‐[9H]xanthen]‐3‐one, FLSC), Scheme , is a xanthene dye well known as a fluorescent tracer with many applications in several areas, markedly in biochemical research and as a diagnostic tool in the field of ophthalmology and optometry in medicine . FLSC has been largely used in medicine as fluorescent label in immunoassay , DNA detection , antibiotics and as diagnostic tool in the field of ophthalmology and optometry , also finding numerous applications in sensors and as a textile dye . On the other hand, the growing use of FLSC increases its harmfulness as a chemical pollutant .…”

Section: Introductionmentioning

confidence: 99%

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Oxidation Mechanism of Fluorescein at Glassy Carbon Electrode

Queiroz¹,

Nascimento²,

Nascimento³

et al. 2016

Electroanalysis

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This study investigates redox properties of fluorescein (FLSC), a fluorescent tracer with many applications in several areas, markedly in biochemical research and health care diagnosis, on glassy carbon electrode (GCE) at a wide interval of pH by using voltammetric techniques. Three peaks were observed at different potentials. The investigation revealed that FLSC is irreversibly electroxidized under a diffusion‐controled and pH–dependent process. The oxidation process in acid and physiological media occurs in two consecutive steps with formation of a main electroactive oxidation product in acid medium. Both oxidation steps involve the transfer of one electron and one proton, corresponding to the oxidation of phenolic groups with formation of ortho‐quinone derivatives, which are reversibly reduced to form catechol derivatives, and/or polymeric products. One electron and one proton are removed from the phenolic group at the position C6’ at the first step and at position C3’ at the second step. The diffusion coefficient of FLSC was assessed in pH=7.0 phosphate buffer (9.77×10−5 cm2 s−1). A differential pulse voltammetric method for determination of FLSC in physiological medium was also proposed.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Oxidation Mechanism of Fluorescein at Glassy Carbon Electrode

Queiroz¹,

Nascimento²,

Nascimento³

et al. 2016

Electroanalysis

View full text Add to dashboard Cite

show abstract

“…One possible answer to modern requirements could be xanthene dyes and their derivatives [ 1 ]. They have found applications in bioimaging [ 2 , 3 , 4 , 5 , 6 , 7 ], photonic [ 8 , 9 , 10 , 11 ] as well as optic sensors [ 12 , 13 , 14 , 15 , 16 ]. Although they have excellent spectroscopic properties (e.g., high quantum yields ~95%), some problems are also noticeable.…”

Section: Introductionmentioning

confidence: 99%

Controlled Synthesis of Luminescent Xanthene Dyes and Use of Ionic Liquid in Thermochromic Reaction

2022

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In this study, we demonstrate six novel xanthene derivatives and their spectroscopic and chemical properties. The presented synthesis examination allowed us to obtain two different compounds during one step, with open and closed lactone rings substituted with different length alkyl chains. Increasing the reaction efficiency to 77% was obtained using the microwave-assisted method. Moreover, the modification of O-alkylation synthesis in an ecofriendly way using a ball mill led to achieving exclusively one opened ring product. All of the synthesized compounds showed different spectroscopic behaviors in comparison with the different organic dyes; the typical concentration quenching of luminescence was not observed. The relationship between the length of the alkyl chain and the time of luminescence decay is presented. Synthetized closed forms of dyes turned out to be promising leuco dyes. For the first time, an ionic liquid was used as a developer of synthesized xanthene derivatives (as leuco dyes), which led to obtaining an irreversible thermochromic marker.

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Plasmonic photonic crystal fiber sensor for optical partial discharge detection

et al. 2022

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Detection of partial discharge (PD) is vital to reassure the operation reliability of high voltage (HV) electrical power systems. Optical detection methods have been developed in recent years due to their high sensitivity and immunity to electromagnetic interference. In this work, D-shaped photonic crystal fiber sensor based on surface plasmon resonance is reported for optical PD detection in HV equipment. A photochromic spirooxazine dye-doped silica sol–gel is utilized for sensing the UV radiation emitted from the PD. The sol–gel refractive index depends on the radiation intensity which affects the resonance wavelength where coupling occurs between the core and surface plasmon modes. The sensing performance is demonstrated with the help of full vectorial finite element method (FVFEM). The geometrical parameters are studied to maximize the sensor sensitivity where high sensitivity of 2.4 nm/mW.cm−2 is achieved. To the best of our knowledge, it is the first time to use a simple design of plasmonic PCF for optical PD detection.

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Fluorescein filled photonic crystal fiber sensor for simultaneous ultraviolet light and temperature monitoring

Cited by 9 publications

References 12 publications

Oxidation Mechanism of Fluorescein at Glassy Carbon Electrode

Oxidation Mechanism of Fluorescein at Glassy Carbon Electrode

Controlled Synthesis of Luminescent Xanthene Dyes and Use of Ionic Liquid in Thermochromic Reaction

Plasmonic photonic crystal fiber sensor for optical partial discharge detection

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