Bromide–sulfur interchange: Ion chromatographic determination of total reduced thiol levels in plasma

Chitre, Sneha A.; Lobo, Grace-Ann M.; Rathod, Spandan M.; Leslie, R. Vincent; Livingstone, Callum; Davis, James A.

doi:10.1016/j.jchromb.2008.01.040

Cited by 13 publications

(5 citation statements)

References 25 publications

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“…While the poly(NIPAM-AAm) nanogel has no signicant absorption at wavelengths above 280 nm, there is a clear broad peak centered at 280 nm in the curve of FCNPs, which represents the typical absorption of an aromatic p system and is similar to that of polycyclic aromatic hydrocarbons. 46 In addition, the hybrid nanogels have a similar absorption peak centered at 280 nm, indicating that the FCNPs have been successfully immobilized into the poly-(NIPAM-AAm) nanogels. Fig.…”

Section: Resultsmentioning

confidence: 93%

Responsive polymer–fluorescent carbon nanoparticle hybrid nanogels for optical temperature sensing, near-infrared light-responsive drug release, and tumor cell imaging

et al. 2014

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Fluorescent carbon nanoparticles (FCNPs) have been successfully immobilized into poly(N-isopropylacrylamide-co-acrylamide) [poly(NIPAM-AAm)] nanogels based on one-pot precipitation copolymerization of NIPAM monomers with hydrogen bonded FCNP-AAm complex monomers in water. The resultant poly(NIPAM-AAm)-FCNP hybrid nanogels can combine functions from each building block for fluorescent temperature sensing, cell imaging, and near-infrared (NIR) light responsive drug delivery. The FCNPs in the hybrid nanogels not only emit bright and stable photoluminescence (PL) and exhibit up-conversion PL properties, but also increase the loading capacity of the nanogels for curcumin drug molecules. The reversible thermo-responsive swelling/shrinking transition of the poly(NIPAM-AAm) nanogel can not only modify the physicochemical environment of the FCNPs to manipulate the PL intensity for sensing the environmental temperature change, but also regulate the releasing rate of the loaded anticancer drug. In addition, the FCNPs embedded in the nanogels can convert the NIR light to heat, thus an exogenous NIR irradiation can further accelerate the drug release and enhance the therapeutic efficacy. The hybrid nanogels can overcome cellular barriers to enter the intracellular region and light up the mouse melanoma B16F10 cells upon laser excitation. The demonstrated hybrid nanogels with nontoxic and optically active FCNPs immobilized in responsive polymer nanogels are promising for the development of a new generation of multifunctional materials for biomedical applications.

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Section: Resultsmentioning

confidence: 93%

Responsive polymer–fluorescent carbon nanoparticle hybrid nanogels for optical temperature sensing, near-infrared light-responsive drug release, and tumor cell imaging

et al. 2014

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“…Also, typical UV-vis absorption spectra of CNPs are shown in Figure 1c, which features two peaks in the 250-350 nm region. These peaks represent the typical absorption of an aromatic π-system, which is similar to that of polycyclic aromatic hydrocarbons [37] and related CNPs. [36] To further explore their optical properties, the steady state photoluminescence (PL) of CNPs in solution (2.5 mg mL −1 in DMF:DMSO 4:1) was studied using different excitation wavelengths.…”

mentioning

confidence: 75%

Carbon Nanoparticles in High‐Performance Perovskite Solar Cells

Yavari

Mazloum-Ardakani

Gholipour

et al. 2018

Advanced Energy Materials

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Perovskite solar cells have attracted considerable interest among the photovoltaics research community, because of their high solar-to-electric power conversion efficiencies and low fabrication costs. [1,2] The employed metal-halide perovskites are solution-processable high-quality semiconductors with exceptional properties such as absorption over a wide spectrum, [3][4][5] a direct band gap, [6] and charge carrier diffusion lengths in the micrometer range. [7] These characteristics have enabled a broad range of possible applications ranging from perovskite solar cells (PSCs), [8] light-emitting diodes, [9] lasers, [10,11] photodetectors, [12,13] X-ray detectors, [14,15] to sensors. [16] In the past few years, organic-inorganic metal halide ABX 3 perovskites (A = Rb, Cs, methylammonium, formamidinium (FA); B = Pb, Sn; X = Cl, Br, I) have rapidly emerged as promising materials for photovoltaic applications. Tuning the film morphology by various deposition techniques and additives is crucial to achieve solar cells with high performance and long-term stability. In this work, carbon nanoparticles (CNPs) containing functional groups are added to the perovskite precursor solution for fabrication of fluorine-doped tin oxide/TiO 2 /perovskite/spiro-OMeTAD/gold devices. With the addition of CNPs, the perovskite films are thermally more stable, contain larger grains, and become more hydrophobic. NMR experiments provide strong evidence that the functional groups of the CNPs interact with FA cations already in the precursor solution. The fabricated solar cells show a power-conversion efficiency of 18% and negligible hysteresis.

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“…At present, a variety of detection methods were widely used, mainly including UV–vis spectroscopy , CE with electrochemical detection , ion‐exchange chromatographic detection , and HPLC . Some other turn‐on fluorescent probes for the detection of thiophenols have also been reported , however, most of fluorescence‐based turn‐on probes for the determination of thiols or thiophenols suffered from the relatively poor selectivity toward aliphatic thiols and thiophenols.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, these probes only provided the total amount of thiols or thiophenols in samples, and they could not be applied to identify a single component. To overcome these drawbacks, fluorescent labeling reagents coupled with separation technologies, such as capillary electrophores and chromatographic separation included GC , ion chromatography , and HPLC have been widely used. The monitoring techniques used for these separation methods above mentioned were mainly included fluorescence , UV , and MS , and so on.…”

Section: Introductionmentioning

confidence: 99%

3‐(2‐Bromoacetamido)‐N‐(9‐ethyl‐9H)‐carbazol fluorescent probe and its application for the determination of thiophenols in rubber products by HPLC with fluorescence detection and atmospheric chemical ionization mass spectrometry identification

You

Dou

Song

et al. 2017

J of Separation Science

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A rapid, sensitive, and selective precolumn derivatization method for the simultaneous determination of eight thiophenols using 3-(2-bromoacetamido)-N-(9-ethyl-9H)-carbazol as a labeling reagent by high-performance liquid chromatography with fluorescence detection has been developed. The labeling reagent reacted with thiophenols at 50°C for 50 min in aqueous acetonitrile in the presence of borate buffer (0.10 mol/L, pH 11.2) to give high yields of thiophenol derivatives. The derivatives were identified by online postcolumn mass spectrometry. The collision-induced dissociation spectra for thiophenol derivatives gave the corresponding specific fragment ions at m/z 251.3, 223.3, 210.9, 195.8, and 181.9. At the same time, derivatives exhibited intense fluorescence with an excitation maximum at λ = 276 nm and an emission maximum at λ = 385 nm. Excellent linear responses were observed for all analytes over the range of 0.033-6.66 μmol/L with correlation coefficients of more than 0.9997. Detection limits were in the range of 0.94-5.77 μg/L with relative standard deviations of less than 4.54%. The feasibility of derivatization allowed the development of a rapid and highly sensitive method for the quantitative analysis of trace levels of thiophenols from some rubber products. The average recoveries (n = 3) were in the range of 87.21-101.12%.

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Bromide–sulfur interchange: Ion chromatographic determination of total reduced thiol levels in plasma

Cited by 13 publications

References 25 publications

Responsive polymer–fluorescent carbon nanoparticle hybrid nanogels for optical temperature sensing, near-infrared light-responsive drug release, and tumor cell imaging

Responsive polymer–fluorescent carbon nanoparticle hybrid nanogels for optical temperature sensing, near-infrared light-responsive drug release, and tumor cell imaging

Carbon Nanoparticles in High‐Performance Perovskite Solar Cells

3‐(2‐Bromoacetamido)‐N‐(9‐ethyl‐9H)‐carbazol fluorescent probe and its application for the determination of thiophenols in rubber products by HPLC with fluorescence detection and atmospheric chemical ionization mass spectrometry identification

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