Selective NO reduction using blue ferrocenyl cation

Vergheese, T. Mary; Berchmans, Sheela

doi:10.1016/j.electacta.2006.05.058

Cited by 10 publications

(1 citation statement)

References 27 publications

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“…One other mechanistic possibility we considered was a redox reaction between NO and ferrocene to form a ferrocenium hyponitrite species. − We hypothesized that a colorimetric change in the polymer coating associated with the oxidation of ferrocene (yellow) to ferrocenium (blue) could change the coating’s refractive index, causing a WGM resonance shift. To test this hypothesis, we performed a solution-phase experiment wherein NO gas was bubbled through a solution of the poly(FcMA-MMA) copolymer in MeCN.…”

Section: Resultsmentioning

confidence: 99%

Low Part-Per-Trillion, Humidity Resistant Detection of Nitric Oxide Using Microtoroid Optical Resonators

Xu,

Stanko,

Cerione

et al. 2024

ACS Appl. Mater. Interfaces

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The nitric oxide radical plays pivotal roles in physiological as well as atmospheric contexts. Although the detection of dissolved nitric oxide in vivo has been widely explored, highly sensitive (i.e., low part-per-trillion level), selective, and humidity-resistant detection of gaseous nitric oxide in air remains challenging. In the field, humidity can have dramatic effects on the accuracy and selectivity of gas sensors, confounding data, and leading to overestimation of gas concentration. Highly selective and humidity-resistant gaseous NO sensors based on laser-induced graphene were recently reported, displaying a limit of detection (LOD) of 8.3 ppb. Although highly sensitive (LOD = 590 ppq) single-wall carbon nanotube NO sensors have been reported, these sensors lack selectivity and humidity resistance. In this report, we disclose a highly sensitive (LOD = 2.34 ppt), selective, and humidity-resistant nitric oxide sensor based on a whispering-gallery mode microtoroid optical resonator. Excellent analyte selectivity was enabled via novel ferrocene-containing polymeric coatings synthesized via reversible addition−fragmentation chain-transfer polymerization. Utilizing a frequency locked optical whispering evanescent resonator system, the microtoroid's realtime resonance frequency shift response to nitric oxide was tracked with subfemtometer resolution. The lowest concentration experimentally detected was 6.4 ppt, which is the lowest reported to date. Additionally, the performance of the sensor remained consistent across different humidity environments. Lastly, the impact of the chemical composition and molecular weight of the novel ferrocene-containing polymeric coatings on sensing performance was evaluated. We anticipate that our results will have impact on a wide variety of fields where NO sensing is important such as medical diagnostics through exhaled breath, determination of planetary habitability, climate change, air quality monitoring, and treating cardiovascular and neurological disorders.

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Section: Resultsmentioning

confidence: 99%

Low Part-Per-Trillion, Humidity Resistant Detection of Nitric Oxide Using Microtoroid Optical Resonators

Xu,

Stanko,

Cerione

et al. 2024

ACS Appl. Mater. Interfaces

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Tailoring self-assembled monolayers at the electrochemical interface

2009

Self Cite

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Abstract. The main focus of this review is to illustrate the amenability of self-assembled monolayers (SAMs) for functionalisation with different receptors, catalytic materials, biomolecules, enzymes, antigen-antibody, etc for various applications. The review discusses initially about the preparation and characterization of SAMs and tailoring of SAMs by incorporation of suitable recognition elements. A description of how the molecular recognition is achieved through forces like electrostatic, covalent and host-guest interactions is included in the review.

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HNO Generation From NO, Nitrite, Inorganic or Organic Nitrosyls, and Crosstalk With H2S

Ivanović-Burmazović

2017

The Chemistry and Biology of Nitroxyl (HNO)

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Selective NO reduction using blue ferrocenyl cation

Cited by 10 publications

References 27 publications

Low Part-Per-Trillion, Humidity Resistant Detection of Nitric Oxide Using Microtoroid Optical Resonators

Low Part-Per-Trillion, Humidity Resistant Detection of Nitric Oxide Using Microtoroid Optical Resonators

Tailoring self-assembled monolayers at the electrochemical interface

HNO Generation From NO, Nitrite, Inorganic or Organic Nitrosyls, and Crosstalk With H2S

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