Determination of thermodynamic parameters from light intensity signals obtained from oxygen optical sensors

Badocco, Denis; Mondin, Andrea; Pastore, Paolo

doi:10.1016/j.snb.2012.01.030

Cited by 11 publications

(15 citation statements)

References 30 publications

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“…This indicates that the migration of the indicator into PMMA (which has lower gas permeability than PS) is very efficient. Similar effects were observed by Badocco et al who characterized the sensors prepared by coating of PMMA fibers with a Pt(II) porphyrin in polysulfon [48]. In fact, the authors documented decrease in the sensitivity over time and observed very long dynamic response times for the sensors.…”

Section: Resultssupporting

confidence: 78%

Stable optical oxygen sensing materials based on click-coupling of fluorinated platinum(II) and palladium(II) porphyrins—A convenient way to eliminate dye migration and leaching

Koren

Borisov

Klimant

2012

Sensors and Actuators B: Chemical

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Nucleophilic substitution of the labile para-fluorine atoms of 2,3,4,5,6-pentafluorophenyl groups enables a click-based covalent linkage of an oxygen indicator (platinum(II) or palladium(II) 5,10,15,20-meso-tetrakis-(2,3,4,5,6-pentafluorophenyl)-porphyrin) to the sensor matrix. Copolymers of styrene and pentafluorostyrene are chosen as polymeric materials. Depending on the reaction conditions either soluble sensor materials or cross-linked microparticles are obtained. Additionally, we prepared Ormosil-based sensors with linked indicator, which showed very high sensitivity toward oxygen. The effect of covalent coupling on sensor characteristics, stability and photophysical properties is studied. It is demonstrated that leaching and migration of the dye are eliminated in the new materials but excellent photophysical properties of the indicators are preserved.

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Section: Resultssupporting

confidence: 78%

Stable optical oxygen sensing materials based on click-coupling of fluorinated platinum(II) and palladium(II) porphyrins—A convenient way to eliminate dye migration and leaching

Koren

Borisov

Klimant

2012

Sensors and Actuators B: Chemical

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“…[Ru(dpp) 3 ] 2+ dyes display moderately intense absorption and a broad MLCT emission in the visible region with an unquenched lifetime τ o of ~ 6.4 µs and quantum yield φ of ~0.3 (Table 1) (Alford, et al, 1985). [Ru(dpp) 3 ] 2+ has been studied in various O 2 -sensitive matrices including sol-gel (MacCraith, et al, 1993;Xu, et al, 2001), organically modified silicate (ormosil) (Badocco, Mondin, & Pastore, 2012;Chen, et al, 2002;Klimant, et al, 1999;McDonagh, et al, 2001;Tang, et al, 2003), organic polymers such as polystyrene (PS) (Hartmann, Leiner, & Lippitsch, 1995;Klimant, et al, 1997), polysulfone (PSu) (Badocco & Pastore, 2008), ethyl cellulose (EC) (Draxler, et al, 1995), polydimethyl silloxane (PDMS) (Xu, et al, 1994). Ionic complexes such as [Ru(dpp) 3 ] 2+ suffer from poor solubility in hydrophobic polymers.…”

Section: O 2 -Sensitive Dyesmentioning

confidence: 99%

“…In Pt(II)-tetrakis-(pentafuorophenyl)porphyrin (PtTFPP) dye contain the electronwithdrawing perfluorinated substituents which lower its oxidation potential and improve photostability (Amao, Miyashita, & Okura, 2001;Lee & Okura, 1997b;Puklin, et al, 2000). This dye has been extensively used in various polymers including PS (Amao, et al, 2001;Lee & Okura, 1997b), PSu (Badocco, et al, 2012;Xue, et al, 2015), sol-gel matrices (Chu & Chuang, 2015;Chu & Lin, 2014;Chu & Lo, 2011) and co-polymers. O 2 sensors have been developed by covalently linking PtTFPP to poly(2-hydroxyethyl methacrylate)-copolyacrylamide (Tian, Shumway, & Meldrum, 2010), co-polymers of styrene and pentafluorostyrene (Koren, Borisov, & Klimant, 2012), polyfluorene co-polymer (Dmitriev, et al, 2015).…”

Section: O 2 -Sensitive Dyesmentioning

confidence: 99%

High throughput non-destructive assessment of quality and safety of packaged food products using phosphorescent oxygen sensors

Banerjee

Kelly

Kerry

et al. 2016

Trends in Food Science & Technology

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Intelligent and active packaging technologies have gained attention in recent time due to increased demand by the consumers and manufacturers for sustaining the quality and safety of food products, improved shelf-life as well as real time monitoring of the packaging, storage and handling processes. In this context, phosphorescence based sensors for molecular oxygen (O 2) are important tools for monitoring of packaged products, new product development and optimisation. They allow fast, reversible, real-time and quantitative monitoring of residual O 2 levels in a non-destructive manner, being superior over alternative systems. In this review, we describe the main types of phosphorescent O 2-sensitive materials, fabrication methods and general requirements for sensors for food packaging applications. The main developments and representative examples are provided which illustrate the application of such sensors for monitoring of gaseous and dissolved O 2 in various types of packaged foods and beverages. We also compare commercial O 2 sensing instrumentation and disposable O 2 sensors currently in use.

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“…The MuFO is a luminescence‐based optode technique that uses optical sensors made of fiber optic cables, where each cable has one sensing tip and one imaging tip (Larsen et al 2011). The sensor was built in‐house using a sensing solution containing Pt(II) mesoTetra (pentaflourophenyl)–porphine as the lumniophore (Badocco et al 2012). The uncoated ends were placed in front of a DSLR camera and blue LED light (447.5 nm wavelength) in a similar setup as described by Larsen et al (2011).…”

Section: Methodsmentioning

confidence: 99%

Carbon release and transformation from coastal peat deposits controlled by submarine groundwater discharge: a column experiment study

Kreuzburg

Rezanezhad

Milojevic

et al. 2020

Limnology & Oceanography

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Although the majority of coastal sediments consist of sandy material, in some areas marine ingression caused the submergence of terrestrial carbon-rich peat soils. This affects the coastal carbon balance, as peat represents a potential carbon source. We performed a column experiment to better understand the coupled flow and biogeochemical processes governing carbon transformations in submerged peat under coastal fresh groundwater (GW) discharge and brackish water intrusion. The columns contained naturally layered sediments with and without peat (organic carbon content in peat 39 AE 14 wt%), alternately supplied with oxygen-rich brackish water from above and oxygen-poor, low-saline GW from below. The low-saline GW discharge through the peat significantly increased the release and ascent of dissolved organic carbon (DOC) from the peat (δ 13 C DOC − 26.9‰ to − 27.7‰), which was accompanied by the production of dissolved inorganic carbon (DIC) and emission of carbon dioxide (CO 2 ), implying DOC mineralization. Oxygen respiration, sulfate (SO 2 − 4 ) reduction, and methane (CH 4 ) formation were differently pronounced in the sediments and were accompanied with higher microbial abundances in peat compared to sand with SO 2 − 4 -reducing bacteria clearly dominating methanogens. With decreasing salinity and SO 2− 4 concentrations, CH 4 emission rates increased from 16.5 to 77.3 μmol m −2 d −1 during a 14-day, low-saline GW discharge phase. In contrast, oxygenated brackish water intrusion resulted in lower DOC and DIC pore water concentrations and significantly lower CH 4 and CO 2 emissions. Our study illustrates the strong dependence of carbon cycling in shallow coastal areas with submerged peat deposits on the flow and mixing dynamics within the subterranean estuary.Sea-level rise is considered to be one of the main impacts of climate change, with significant implications for mineralization processes within coastal wetlands (Nicholls and Cazenave 2010;Neubauer 2013;Plag and Jules-Plag 2013;Hahn et al. 2015;Wang et al. 2016). In particular, coastline retreat may cause submergence of terrestrial, organic carbonrich peat sediments. The extent of submarine peat and the process-based impacts on carbon transformation processes and exchange of trace gases in shallow coastal areas have been poorly addressed. Sediment column experiments are powerful tools to investigate subprocesses and simulate changes of environmental and hydrological conditions. These changes are accelerated by land subsidence of peatland caused by their large-scale drainage for agricultural use. Land subsidence alters the hydrologic exchange processes across the land-sea interface (Nieuwenhuis and Schokking 1997;Hooijer et al. 2012) including changes in surficial runoff, subsurface mixing, and submarine groundwater discharge (SGD).SGD is comprised of all flow of water from the seabed into the coastal ocean, predominantly recirculated seawater (SW), driven by wave action, density gradients, and sea-level dynamics (Robinson et al.

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Determination of thermodynamic parameters from light intensity signals obtained from oxygen optical sensors

Cited by 11 publications

References 30 publications

Stable optical oxygen sensing materials based on click-coupling of fluorinated platinum(II) and palladium(II) porphyrins—A convenient way to eliminate dye migration and leaching

Stable optical oxygen sensing materials based on click-coupling of fluorinated platinum(II) and palladium(II) porphyrins—A convenient way to eliminate dye migration and leaching

High throughput non-destructive assessment of quality and safety of packaged food products using phosphorescent oxygen sensors

Carbon release and transformation from coastal peat deposits controlled by submarine groundwater discharge: a column experiment study

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