23570

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Photosensitized degradation kinetics of trace halogenated contaminants in natural waters using membrane introduction mass spectrometry as an in situ reaction monitor.

Dane R Letourneau et al.

Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 14(11), 2108-2118 (2015-10-07)

The photochemically mediated dechlorination of polyhalogenated compounds represents a potential decontamination strategy and a relevant environmental process in chemically reducing media. We report the UV irradiation of natural and artificial waters containing natural dissolved organic matter to effect the photo-sensitized

FT-IR, FT-Raman and UV spectral investigation: computed frequency estimation analysis and electronic structure calculations on chlorobenzene using HF and DFT.

M Govindarajan et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 88, 37-48 (2011-12-27)

In this work, the vibrational spectral analysis was carried out by using FT-Raman and FT-IR spectroscopy in the range 100-4000 cm(-1) and 400-4000 cm(-1) respectively, for the title molecule. The molecular structure, fundamental vibrational frequencies and intensity of the vibrational

Side group of poly(3-alkylthiophene)s controlled dispersion of single-walled carbon nanotubes for transparent conducting film.

Wei-Chao Chen et al.

ACS applied materials & interfaces, 7(8), 4616-4622 (2015-02-11)

Controlled dispersion of single-walled carbon nanotubes (SWCNTs) in common solvents is a challenging issue, especially for the rising need of low cost flexible transparent conducting films (TCFs). Utilizing conductive polymer as surfactant to facilitate SWCNTs solubility is the most successful

Hollow fiber based liquid-liquid-liquid microextraction combined with sweeping micellar electrokinetic chromatography for the sensitive determination of second-generation antidepressants in human fluids.

Xiaoqing Zhou et al.

The Analyst, 140(5), 1662-1671 (2015-01-27)

An effective dual preconcentration method involving off-line hollow fiber liquid-liquid-liquid microextraction (HF-LLLME) and on-line sweeping micellar electrokinetic chromatography (sweeping-MEKC) was proposed for the determination of five second-generation antidepressants, including fluoxetine, sertraline, paroxetine, fluvoxamine and citalopram. In HF-LLLME, the analytes were

Quantum chemical studies on structure of 1-3-dibromo-5-chlorobenzene.

M Arivazhagan et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 82(1), 316-326 (2011-08-13)

Molecular structure and vibrational frequencies of 1-3-dibromo-5-chlorobenzene (DBCB) have been investigated by density functional theory (DFT) calculations using Becke's three-parameter exchange functional combined with Lee-Yang-Parr correlation (B3LYP) and standard basis set 6-31G. DFT (B3LYP/6-31G) calculations have been performed giving energies

Biological responses of maize (Zea mays) plants exposed to chlorobenzenes. Case study of monochloro-, 1,4-dichloro- and 1,2,4-trichloro-benzenes.

Angélique San Miguel et al.

Ecotoxicology (London, England), 21(2), 315-324 (2011-09-29)

A 7-day-exposure time experiment was designed to investigate the phytotoxicity of chlorobenzenes (CBs) on Zea mays seedlings, focusing on the growth and generation of oxidative stress. Significant growth inhibition (based on biomass gain) was observed for exposure to monochlorobenzene (MCB)

Sludge as dioxins suppressant in hospital waste incineration.

Mi Yan et al.

Waste management (New York, N.Y.), 32(7), 1453-1458 (2012-04-06)

Nitrogen containing compounds such as ammonia, urea and amines can effectively inhibit the formation of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs). Sewage sludge accumulates both sulfur and nitrogen during wastewater treatment so it could be used to reduce PCDD/Fs formation. Indeed

A membrane introduction mass spectrometer utilizing ion-molecule reactions for the on-line speciation and quantitation of volatile organic molecules.

Nicholas G Davey et al.

Rapid communications in mass spectrometry : RCM, 29(23), 2187-2194 (2015-11-03)

The ability of membrane introduction mass spectrometry to quantitatively resolve low molecular weight volatile organic compounds (VOCs) such as benzene, toluene, ethylbenzene and xylene (BTEX) using electron ionization (EI) can be compromised by isobaric interferences. This work focuses on reducing

Efficient hole-blocking layer-free planar halide perovskite thin-film solar cells.

Weijun Ke et al.

Nature communications, 6, 6700-6700 (2015-03-24)

Efficient lead halide perovskite solar cells use hole-blocking layers to help collection of photogenerated electrons and to achieve high open-circuit voltages. Here, we report the realization of efficient perovskite solar cells grown directly on fluorine-doped tin oxide-coated substrates without using

Solution-processed MoO3:PEDOT:PSS hybrid hole transporting layer for inverted polymer solar cells.

Yiling Wang et al.

ACS applied materials & interfaces, 7(13), 7170-7179 (2015-03-21)

Solution-processed organic-inorganic hybrids composing of MoO3 nanoparticles and PEDOT:PSS were developed for use in inverted organic solar cells as hole transporting layer (HTL). The hybrid MoO3:PEDOT:PSS inks were prepared by simply mixing PEDOT:PSS aqueous and MoO3 ethanol suspension together. A

Spectroscopic (FT-IR, FT-Raman, UV and NMR) investigation and NLO, HOMO-LUMO, NBO analysis of organic 2,4,5-trichloroaniline.

M Govindarajan et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 97, 231-245 (2012-07-07)

In this work, the experimental and theoretical study on the molecular structure and vibrational spectra of 2,4,5-trichloroaniline (C(6)H(4)NCl(3), abbreviated as 2,4,5-TClA) were studied. The FT-IR and FT-Raman spectra were recorded. The molecular geometry and vibrational frequencies in the ground state

A new approach for diffusive sampling based on SPME for occupational exposure assessment.

P Marín et al.

Journal of occupational and environmental hygiene, 10(3), 132-142 (2013-01-30)

Passive sampling is a well-established methodology for the evaluation of exposures to environmental volatile organic compounds (VOCs). The solid-phase microextraction (SPME) technique is a reliable means of sampling VOCs in air. SPME is also being applied as a passive sampler

Remediation of nonaqueous phase liquid polluted sites using surfactant-enhanced air sparging and soil vapor extraction.

Chuan-Yu Qin et al.

Water environment research : a research publication of the Water Environment Federation, 85(2), 133-140 (2013-03-12)

A two-dimensional laboratory sand tank was installed to study the remediation efficiency of surfactant-enhanced air sparging (-SEAS) coupled with soil vapor extraction (SVE) in nonaqueous phase liquid (NAPL) polluted sites. During initial stages of remediation, it was more reasonable to

Control of I-V hysteresis in CH3NH3PbI3 perovskite solar cell.

Hui-Seon Kim et al.

The journal of physical chemistry letters, 6(22), 4633-4639 (2015-11-10)

Mismatch of current (I)-voltage (V) curves with respect to the scan direction, so-called I-V hysteresis, raises critical issue in MAPbI3 (MA = CH3NH3) perovskite solar cell. Although ferroelectric and ion migration have been proposed as a basis for the hysteresis

Knoevenagel Condensation of Aldehydes and Ketones with Alkyl Nitriles Catalyzed by Strongly Basic Anion Exchange Resins under Continuous-Flow Conditions

Ishitani H, et al.

Asian Journal of Organic Chemistry, 7, 2061-2064 (2018)

Hydrophobic organic compound (HOC) partitioning behaviour to municipal wastewater colloidal organic carbon.

Kerry N McPhedran et al.

Water research, 47(7), 2222-2230 (2013-03-12)

The sorption behaviour of hydrophobic organic compounds (HOCs) 1,2,4,5-tetrachlor-obenzene (TeCB), pentachlorobenzene (PeCB) and hexachlorobenzene (HCB) to Aldrich humic acid (AHA) and municipal wastewater treatment plant (MWTP) influent colloidal organic carbon (COC) was investigated using the gas-stripping technique. Gas stripping assumptions

Coq B, et al.

J. Catal., 101(2), 434-445 (1986)

Pathway-dependent isotope fractionation during aerobic and anaerobic degradation of monochlorobenzene and 1,2,4-trichlorobenzene.

Xiaoming Liang et al.

Environmental science & technology, 45(19), 8321-8327 (2011-08-20)

Stable carbon isotope fractionation is a valuable tool for monitoring natural attenuation and to establish the fate of groundwater contaminants. In this study, we measured carbon isotope fractionation during aerobic and anaerobic degradation of two chlorinated benzenes: monochlorobenzene (MCB) and

One-Pot Synthesis of Monodisperse Noble Metal @ Resorcinol-Formaldehyde (M@RF) and M@Carbon Core-Shell Nanostructure and Their Catalytic Applications.

Peipei Yang et al.

Langmuir : the ACS journal of surfaces and colloids, 31(42), 11701-11708 (2015-10-06)

We demonstrate that noble metal @ RF core-shell nanostructures can be obtained through a facile one-pot synthesis approach in the absence of any additional surfactants. Monodisperse metal@RF core-shell nanostructures can be produced within 1 h on a large scale. Both

A multiclass method for the analysis of endocrine disrupting chemicals in human urine samples. Sample treatment by dispersive liquid-liquid microextraction.

F Vela-Soria et al.

Talanta, 129, 209-218 (2014-08-17)

The population is continuously exposed to endocrine disrupting chemicals (EDCs). This has influenced an increase in diseases and syndromes that are more frequent nowadays. Therefore, it is necessary to develop new analytical procedures to evaluate the exposure with the ultimate

Polymer fullerene solution phase behaviour and film formation pathways.

Rajeev Dattani et al.

Soft matter, 11(16), 3125-3131 (2015-03-06)

We report the phase behaviour of polymer/fullerene/solvent ternary mixtures and its consequence for the morphology of the resulting composite thin films. We focus particularly on solutions of polystyrene (PS), C60 fullerene and toluene, which are examined by static and dynamic

Calculating virtual log P in the alkane/water system (log P(N)(alk)) and its derived parameters deltalog P(N)(oct-alk) and log D(pH)(alk).

Giulia Caron et al.

Journal of medicinal chemistry, 48(9), 3269-3279 (2005-04-29)

Growing interest in the use of both the logarithm of the partition coefficient of the neutral species in the alkane/water system (log P(N)(alk)) and the difference between log P(N)(oct) (the logarithm of the partition coefficient of the neutral species in

On π-stacking, C-H/π, and halogen bonding interactions in halobenzene clusters: resonant two-photon ionization studies of chlorobenzene.

Lloyd Muzangwa et al.

The Journal of chemical physics, 137(18), 184307-184307 (2012-11-21)

Noncovalent interactions such as hydrogen bonding, π-π stacking, CH/π interactions, and halogen bonding play crucial roles in a broad spectrum of chemical and biochemical processes, and can exist in cooperation or competition. Here we report studies of the homoclusters of

Solvent dependent Raman bandshape analysis on CO containing molecules: vibrational relaxation study.

Th Gomti Devi et al.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 91, 106-112 (2012-03-01)

Solvent dependent Raman band studies of some carbonyl containing molecules have been carried out in chlorobenzene (CLB) and chloroform (CLF) solvents. The variation of bandwidth with the solvent concentration was discussed using different mechanisms. The vibrational and reorientational correlation times

The formation of [M-H]+ ions in N-alkyl-substituted thieno[3,4-c]-pyrrole-4,6-dione derivatives during atmospheric pressure photoionization mass spectrometry.

Salim Sioud et al.

Rapid communications in mass spectrometry : RCM, 28(22), 2389-2397 (2014-10-11)

The formation of ions during atmospheric pressure photoionization (APPI) mass spectrometry in the positive mode usually provides radical cations and/or protonated species. Intriguingly, during the analysis of some N-alkyl-substituted thieno[3,4-c]pyrrole-4,6-dione (TPD) derivatives synthesized in our laboratory, unusual [M-H](+) ion peaks

A highly active and magnetically retrievable nanoferrite-DOPA-copper catalyst for the coupling of thiophenols with aryl halides.

R B Nasir Baig et al.

Chemical communications (Cambridge, England), 48(20), 2582-2584 (2012-02-02)

Diaryl sulfides were synthesized using a magnetically recoverable heterogeneous Cu catalyst via one-pot multi component reaction using MW irradiation; the use of isopropanol as a benign reaction medium, easy recovery of the catalyst using an external magnet, efficient recycling, and

Synthesis of deuterium labeled ketamine metabolite dehydronorketamine-d₄.

Rohidas S Sulake et al.

Bioorganic & medicinal chemistry letters, 21(19), 5719-5721 (2011-08-26)

A convenient synthesis of ketamine metabolite dehydronorketamine-d(4), starting from commercially available deuterium labeled bromochlorobenzene, was achieved. Key steps include Grignard reaction, regioselective hydroxybromination, Staudinger reduction, and dehydrohalogenation.

Toward large scale roll-to-roll production of fully printed perovskite solar cells.

Kyeongil Hwang et al.

Advanced materials (Deerfield Beach, Fla.), 27(7), 1241-1247 (2015-01-13)

Fully printed perovskite solar cells are demonstrated with slot-die coating, a scalable printing method. A sequential slot-die coating process is developed to produce efficient perovskite solar cells and to be used in a large-scale roll-to-roll printing process. All layers excluding

Evaluation of injection methods for fast, high peak capacity separations with low thermal mass gas chromatography.

Brian D Fitz et al.

Journal of chromatography. A, 1392, 82-90 (2015-03-31)

Low thermal mass gas chromatography (LTM-GC) was evaluated for rapid, high peak capacity separations with three injection methods: liquid, headspace solid phase micro-extraction (HS-SPME), and direct vapor. An Agilent LTM equipped with a short microbore capillary column was operated at

The ionization mechanisms in direct and dopant-assisted atmospheric pressure photoionization and atmospheric pressure laser ionization.

Tiina J Kauppila et al.

Journal of the American Society for Mass Spectrometry, 25(11), 1870-1881 (2014-09-25)

A novel, gas-tight API interface for gas chromatography-mass spectrometry was used to study the ionization mechanism in direct and dopant-assisted atmospheric pressure photoionization (APPI) and atmospheric pressure laser ionization (APLI). Eight analytes (ethylbenzene, bromobenzene, naphthalene, anthracene, benzaldehyde, pyridine, quinolone, and

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