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Showing 1 to 12 of 137 entries
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Molecular characterization of brown carbon (BrC) chromophores in secondary organic aerosol generated from photo-oxidation of toluene.

Physical chemistry chemical physics : PCCP

Lin P, Liu J, Shilling JE, Kathmann SM, Laskin J, Laskin A.
PMID: 26173064
Phys Chem Chem Phys. 2015 Sep 28;17(36):23312-25. doi: 10.1039/c5cp02563j. Epub 2015 Jul 14.

Atmospheric brown carbon (BrC) is a significant contributor to light absorption and climate forcing. However, little is known about a fundamental relationship between the chemical composition of BrC and its optical properties. In this work, light-absorbing secondary organic aerosol...

Sensitive monitoring of trace nitrophenols in water samples using multiple monolithic fiber solid phase microextraction and liquid chromatographic analysis.

Talanta

Mei M, Huang X, Yu J, Yuan D.
PMID: 25618644
Talanta. 2015 Mar;134:89-97. doi: 10.1016/j.talanta.2014.10.059. Epub 2014 Nov 06.

In this work, a simple, efficient and environmentally friendly method-multiple monolithic fiber solid-phase microextraction (MMF-SPME) combining with high-performance liquid chromatography (HPLC) was first established for the determination of six trace nitrophenols in water samples. In order to prepare MMF-SPME,...

Correlations between theoretical and experimental determination of heat of formation of certain aromatic nitro compounds.

Computers & chemistry

Chen C, Wu JC.
PMID: 11219427
Comput Chem. 2001 Mar;25(2):117-24. doi: 10.1016/s0097-8485(00)00073-5.

Heats of formation of energetic materials can be obtained either experimentally or theoretically. In order to compare the results of the two methods, some correlation methods were proposed in this study. The molecular structures and heats of formation of...

Theoretical study of the internal rotational barriers in nitrotoluenes, nitrophenols, and nitroanilines.

Computers & chemistry

Chen PC, Chen SC.
PMID: 11778940
Comput Chem. 2002 Jan;26(2):171-8. doi: 10.1016/s0097-8485(01)00105-x.

The molecular geometries and internal rotational barriers of the nitro group of 3-nitrotoluene (3-NT), 4-nitrotoluene (4-NT), 3-nitrophenol (3-NP), 4-nitrophenol (4-NP), 3-nitroaniline (3-NA), and 4-nitroaniline (4-NA) were calculated by five different types of density functional theory (DFT) methods with three...

Solvent extraction and extraction-voltammetric determination of phenols using room temperature ionic liquid.

Analytical and bioanalytical chemistry

Khachatryan KS, Smirnova SV, Torocheshnikova II, Shvedene NV, Formanovsky AA, Pletnev IV.
PMID: 15578163
Anal Bioanal Chem. 2005 Jan;381(2):464-70. doi: 10.1007/s00216-004-2872-y. Epub 2004 Dec 02.

The phenolic compounds phenol, 4-nitrophenol, 2,4-dinitrophenol, 2,6-dinitrophenol, 1-naphthol, 2-naphthol, and 4-chlorophenol are extracted nearly quantitatively from aqueous solution into the room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BMImPF6) in molecular form at pH < p Ka. Picric acid is extracted...

STUDIES ON CELL METABOLISM AND CELL DIVISION : II. STIMULATION OF CELLULAR OXIDATION AND REVERSIBLE INHIBITION OF CELL DIVISION BY DIHALO AND TRIHALOPHENOLS.

The Journal of general physiology

Krahl ME, Clowes GH.
PMID: 19872988
J Gen Physiol. 1936 Nov 20;20(2):173-84. doi: 10.1085/jgp.20.2.173.

The dihalo and trihalophenols, and phenols containing both halo and nitro substituents in the same molecule, produce, in fertilized eggs of Arbacia punctulata, a rise in rate of oxygen consumption and a reversible block to cell division. To define...

Biodegradation of 2,4-dinitrophenol with laccase immobilized on nano-porous silica beads.

Iranian journal of environmental health science & engineering

Dehghanifard E, Jonidi Jafari A, Rezaei Kalantary R, Mahvi AH, Faramarzi MA, Esrafili A.
PMID: 23547870
Iranian J Environ Health Sci Eng. 2013 Apr 01;10(1):25. doi: 10.1186/1735-2746-10-25.

Many organic hazardous pollutants, including 2,4-dinitrophenol (2,4-DNP), which are water soluble, toxic, and not easily biodegradable make concerns for environmental pollution worldwide. In the present study, degradation of nitrophenols-contained effluents by using laccase immobilized on the nano-porous silica beads...

Probing the Aggregation and Signaling Behavior of Some Twisted 9,9'-Bianthryl Derivatives: Observation of Aggregation-Induced Blue-Shifted Emission.

ACS omega

Banerjee S, Both AK, Sarkar M.
PMID: 31458225
ACS Omega. 2018 Nov 19;3(11):15709-15724. doi: 10.1021/acsomega.8b02232. eCollection 2018 Nov 30.

With an aim to understand the photophysical behavior of twisted organic fluorescent molecules in their aggregated state, two twisted biaryl molecules, namely, 9,9'-bianthryl and 10,10'-dicyano-9,9'-bianthryl, have been synthesized and characterized by conventional spectroscopic methods. To understand the role of...

A template of cellulose acetate polymer-ZnAl/C layered double hydroxide composite fabricated with Ni NPs: Applications in the hydrogenation of nitrophenols and dyes degradation.

Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Khan SA, Bakhsh EM, Akhtar K, Khan SB.
PMID: 32650247
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Nov 05;241:118671. doi: 10.1016/j.saa.2020.118671. Epub 2020 Jul 02.

In this work, cellulose acetate polymer (CA) sheet and 2% ZnAl grafted on activated carbon grown in the form of layered double hydroxide (ZnAl/C-LDH) incorporated into CA polymer (CA-ZA2) 5 wt% (CA-ZA5) and 10 wt% of ZnAl/C-LDH (CA-ZA10) sheets...

Mussel-inspired construction of thermo-responsive double-hydrophilic diblock copolymers-decorated reduced graphene oxide as effective catalyst supports for highly dispersed superfine Pd nanoparticles.

Nanoscale

Duan H, Yang Y, Lü J, Lü C.
PMID: 29926868
Nanoscale. 2018 Jul 09;10(26):12487-12496. doi: 10.1039/c8nr02719f.

Well-dispersed ultrafine palladium nanoparticles supported by reduced graphene oxide functionalized with catechol-terminated thermo-responsive block copolymer (PdNPs@BPrGO) were successfully constructed for highly efficient heterogeneous catalytic reduction. We first synthesized a novel temperature-responsive episulfide-containing double-hydrophilic diblock copolymer, poly(poly(ethylene glycol) methyl ether...

Links between the optical properties and chemical compositions of brown carbon chromophores in different environments: Contributions and formation of functionalized aromatic compounds.

The Science of the total environment

Li X, Hu M, Wang Y, Xu N, Fan H, Zong T, Wu Z, Guo S, Zhu W, Chen S, Dong H, Zeng L, Yu X, Tang X.
PMID: 33975110
Sci Total Environ. 2021 Sep 10;786:147418. doi: 10.1016/j.scitotenv.2021.147418. Epub 2021 May 04.

Links between the optical properties and chemical compositions of brown carbon (BrC) are poorly understood because of the complexity of BrC chromophores. We conducted field studies simultaneously at both vehicle-influenced site and biomass burning-affected site in China in polluted...

Inhibitory effect of individual and mixtures of nitrophenols on anaerobic toxicity assay of anaerobic systems: Metabolism and evaluation modeling.

Journal of environmental management

Zhang Z, Yu Y, Xi H, Zhou Y.
PMID: 34896800
J Environ Manage. 2021 Dec 09;304:114237. doi: 10.1016/j.jenvman.2021.114237. Epub 2021 Dec 09.

The single and combined inhibitory effects of different nitrophenols on the anaerobic toxicity assay (ATA) of anaerobic sludge and the variations in the content of extracellular polymeric substances (EPS) were investigated. The results indicated that 2,4-dinitrophenol (2,4-DNP) demonstrated the...

Showing 1 to 12 of 137 entries