Room temperature ionic liquids as optical sensor matrix materials for gaseous and dissolved CO2

Öter, Özlem; Ertekin, Kadriye; Topkaya, Derya; Alp, Serap

doi:10.1016/j.snb.2005.11.040

Cited by 56 publications

(33 citation statements)

References 20 publications

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“…1.4) 81 and reservoir-type sensors. 93,94 Unlike the CO2 sensors described above, 75,76,81 the reservoir-type optical systems had no polymeric matrix. They included a cuvette that was filled with a sensing cocktail IL-BTB (or IL-HPTS) with the additive of a base (NaHCO3 or TBAOH).…”

Section: ·6 Other Functionsmentioning

confidence: 99%

“…81 The sensitivity of the CO2 sensors depended on the indicator pKa, the nature of the counterion of IL, and the nature of the base used in the internal buffer solution. 81,93,94 So, in colorimetric IL-emulsion-based sensors, the range of CO2 content was wider when TB but not BTB was used (Table S1). A significantly higher fluorescent response of HPTS toward CO2 in the same type of CO2-sensor with [BMIm]Tos compared to [BMIm]BF4 was attributable to higher gas solubility in the IL with a more bulky anion, Tos -.…”

Section: ·6 Other Functionsmentioning

confidence: 99%

“…(1) Fabrication of various sensing materials in the different forms (gels, hydrogels, films, and membranes) due to the unique solvent ability of ILs with respect to different matrix materials (TEOS, 70,84 cellulose, [85][86][87][88][89] EC, PMMA, and PVC [74][75][76][77][78][79][80] ), recognition elements (ligands, [77][78][79]85,86,103 indicators, 81,93,94 chromo-responsible dyes, 89 complexes, [74][75][76]80,84,87,90,91 and enzymes 70,88 ), and gaseous analytes (in particular, CO2 82 ).…”

Section: Advantages and Drawbacks Of Using Ils In Optical Sensing Tecmentioning

confidence: 99%

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Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

et al. 2017

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This paper reviews the primary literature reporting the use of ionic liquids (ILs) in optical sensing technologies. The optical chemical sensors that have been developed with the assistance of ILs are classified according to the type of resultant material. Key aspects of applying ILs in such sensors are revealed and discussed. They include using ILs as solvents for the synthesis of sensor matrix materials; additives in polymer matrices; matrix materials; modifiers of the surfaces; and multifunctional sensor components. The operational principles, design, texture, and analytical characteristics of the offered sensors for determining CO2, O2, metal ions, CN -, and various organic compounds are critically discussed. The key advantages and disadvantages of using ILs in optical sensing technologies are defined. Finally, the applicability of the described materials for chemical analysis is evaluated, and possibilities for their further modernization are outlined.

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Section: ·6 Other Functionsmentioning

confidence: 99%

Section: ·6 Other Functionsmentioning

confidence: 99%

Section: Advantages and Drawbacks Of Using Ils In Optical Sensing Tecmentioning

confidence: 99%

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Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

et al. 2017

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“…A C C E P T E D ACCEPTED MANUSCRIPT 3 chemosensors are based on pH changes of an assay matrix that are caused by the formation of carbonate ion through hydration of CO 2 [17][18][19][20][21][22]. New strategies for developing CO 2 chemosensors have recently been developed based on both fluorescent dyes activated by general base and fluorescent dyes with aggregation-induced emission [14][15][16]23,24].…”

Section: A N U S C R I P Tmentioning

confidence: 99%

Intra-molecular hydrogen bonding stabilization based-fluorescent chemosensor for CO 2 : Application to screen relative activities of CO 2 absorbents

et al. 2015

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“…Although these compounds are chemically stable, a protolytic reaction with ammonia requires the presence of water and in dry environments, the lifetime of the sensors is often limited. Room-temperature ionic liquids are promising compounds, as they can stabilize the water content of the sensing layer (Oter et al 2006;Borisov et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Optical Ammonia Sensors for Environmental Applications

Kovács

2014

Analytical Letters

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Triphenyl-methane based indicators bromophenol blue and bromocresol green were immobilized in ormosil sol-gel films prepared from phenyl-triethoxysilane in order to prepare colorimetric ammonia sensors. The sensing layers contained different molar ratios of the indicators, in this way-depending on the pK a values of the indicators-sensors with tailored dynamic ranges could be fabricated. Adsorption based immobilization was also used for the fabrication of chemical layers immersing anodized aluminum films in aqueous solutions of the indicators. Simultaneous immobilization of the indicators was considerably effortful on the anodized aluminum film, compared with the sol-gel film; therefore, the significant temperature dependency of the sensor response was used to shift the dynamic range. The effect of an ionic liquid additive was also investigated to increase the lifetime of these sensors. All sensors were tested spectrophotometrically, although a simple reflection based read-out device was also constructed using two light emitting diodes as light sources and two photodiodes as detectors. The device did not produce a concentration dependent signal but gave a digital yes or no (1 or 0) indicating that ammonia concentrations had reached a preset level.

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Room temperature ionic liquids as optical sensor matrix materials for gaseous and dissolved CO2

Cited by 56 publications

References 20 publications

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

Applications of Ionic Liquids for the Development of Optical Chemical Sensors and Biosensors

Intra-molecular hydrogen bonding stabilization based-fluorescent chemosensor for CO 2 : Application to screen relative activities of CO 2 absorbents

Optical Ammonia Sensors for Environmental Applications

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