Metallo-porphyrin zinc as gas sensitive material for colorimetric gas sensors on planar optical waveguides

Peter, Carolin; Schmitt, Katrin; Apitz, Martin; Woellenstein, Juergen

doi:10.1007/s00542-011-1412-x

Cited by 18 publications

(11 citation statements)

References 15 publications

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“…However, reversibility is rather limited (Figure 8). 77 An optochemical sensor has been developed and optimized to measure CO 2 in food packaged under modified atmosphere. For this purpose, the phosphorescent platinum H 2 TFPP and a colorimetric pH indicator such as α-naphtholphthalein were incorporated in a plastic matrix together with a phase transfer agent, namely tetraoctyl-or cetyltrimethyl-ammonium hydroxide, and applied on a Mylar foil.…”

Section: Optical Sensorsmentioning

confidence: 99%

Porphyrinoids for Chemical Sensor Applications

et al. 2016

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Porphyrins and related macrocycles have been intensively exploited as sensing materials in chemical sensors, since in these devices they mimic most of their biological functions, such as reversible binding, catalytic activation, and optical changes. Such a magnificent bouquet of properties allows applying porphyrin derivatives to different transducers, ranging from nanogravimetric to optical devices, also enabling the realization of multifunctional chemical sensors, in which multiple transduction mechanisms are applied to the same sensing layer. Potential applications are further expanded through sensor arrays, where cross-selective sensing layers can be applied for the analysis of complex chemical matrices. The possibility of finely tuning the macrocycle properties by synthetic modification of the different components of the porphyrin ring, such as peripheral substituents, molecular skeleton, coordinated metal, allows creating a vast library of porphyrinoid-based sensing layers. From among these, one can select optimal arrays for a particular application. This feature is particularly suitable for sensor array applications, where cross-selective receptors are required. This Review briefly describes chemical sensor principles. The main part of the Review is divided into two sections, describing the porphyrin-based devices devoted to the detection of gaseous or liquid samples, according to the corresponding transduction mechanism. Although most devices are based on porphyrin derivatives, seminal examples of the application of corroles or other porphyrin analogues are evidenced in dedicated sections.

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Section: Optical Sensorsmentioning

confidence: 99%

Porphyrinoids for Chemical Sensor Applications

et al. 2016

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“…In addition to WO 3 , other materials reported for gasochromic applications include V 2 O 5 [37][38][39][40], VO x [41], MO x [42], MoO 3 [43] [44], mixed silver/nickel ammonium phosphomolybdate [45], (Ti-V-Ta)O x [35], Ni(OH) 2 [46], peroxopolytungstic acid [47,48], and metals like Y [49]. This effect has also been exploited for the detection of other gases such as volatile organic compounds [50], NO 2 [51], H 2 S, SO 2 [52], NH 3 [53], XeF 2 [54], cyclohexane [55], CO, and Cl 2 [46]. Among the different gasochromic materials available, the most important ones are WO 3 and MoO x .…”

Section: Chromogenic: Definition Materials and Basicsmentioning

confidence: 99%

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Mirzaei

Kim

et al. 2019

Applied Sciences

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Hydrogen is one of the most important gases that can potentially replace fossil fuels in the future. Nevertheless, it is highly explosive, and its leakage should be detected by reliable gas sensors for safe operation during storage and usage. Most hydrogen gas sensors operate at high temperatures, which introduces the risk of hydrogen explosion. Gasochromic WO3 sensors work based on changes in their optical properties and color variation when exposed to hydrogen gas. They can work at low or room temperatures and, therefore, are good candidates for the detection of hydrogen leakage with low risk of explosion. Once their morphology and chemical composition are carefully designed, they can be used for the realization of sensitive, selective, low-cost, and flexible hydrogen sensors. In this review, for the first time, we discuss different aspects of gasochromic WO3 gas sensor-based hydrogen detection. Pristine, heterojunction, and noble metal-decorated WO3 nanostructures are discussed for the detection of hydrogen gas in terms of changes in their optical properties or visible color. This review is expected to provide a good background for research work in the field of gas sensors.

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“…Next to TMPD we also investigated a metalloporphyrine zinc for NO2 sensing. The results are reported in [25].…”

Section: Figmentioning

confidence: 99%