Primary, secondary and tertiary enaminones react with bis(pyridine)iodonium(I) tetrafluoroborate in methylene chloride at room temperature to give α-iodo enaminones in almost quantitative yields. The reported reaction is the first known example of direct iodination of tertiary enaminones.

The product distributions observed after visible light irradiation of a series of 1-alkylcycloalkanols (1–3) and bis(pyridine)iodonium tetrafluoroborate (IPy2BF4), have been compared with those observed after irradiation of the same substrates in the presence of (diacetoxy)iodobenzene (DIB) and...

The ν1 and ν2 bands of DOBr centered near 2668.8 and 852.0cm-1 respectively have been observed at 0.006cm-1 resolution. The ν1 band is perturbed by a quintic anharmonic resonance (ΔKa=0) with 3ν3+ν2. In addition, the millimeter wave spectra arising from the v2=1 and v3=1 states have been o...

The absorption spectra of the HOBr molecule in the near-ultraviolet and in the visible regions produced by excitation to the dissociative triplet and singlet states have been studied by the multi-configuration self-consistent field method with linear and quadratic response techniques. A large ba...

Eosinophil peroxidase and myeloperoxidase use hydrogen peroxide to produce hypobromous acid and hypochlorous acid. These powerful oxidants may damage the lungs if they are produced as part of the inflammatory response in asthma. The aim of this study was to determine if peroxidases generate hypo...

Hypobromous acid (HOBr) is generated by eosinophil peroxidase or myeloperoxidase using hydrogen peroxide, chloride, and bromide in the host defense system of humans, protecting against invading bacteria. Generally, HOBr can react with amines (R-NH2), resulting in bromamines (R-NHBr). Urea (CO(NH...

As one of the most important reactive oxygen species, hypobromous acid (HOBr) has been reported to be linked to a large body of diseases. Although some limited of HOBr-selective probes have been designed, there was no probes reported capable of sensing of HOBr with lysosome-targetable ability an...

In this study an epoxy-ester coating was filled with zinc acetyl acetonate (ZnAA). The active corrosion inhibition properties of the ZnAA pigment were studied by electrochemical noise (EN), electrochemical impedance spectroscopy (EIS) and polarization techniques. Also, the surface morphology and...

In this study, the impacts of heavy metals (1 mg L−1) on the nitrogen removal, bioactivity of anaerobic ammonia-oxidizing bacteria (AAOB) and the microbial community of anaerobic ammonium oxidation (Anammox) process were investigated. It was observed that short-term exposure in Cu (II) and Zn (I...

Nonionic and anionic surfactants often occur in anaerobic environments, but their roles in the removal of organic contaminants by Fe-bearing mineral/Fe(II) have not been determined. In this study, batch experiments were performed to investigate the effects of a nonionic surfactant (TX-100) and a...

Heterotrophic denitrifiers, capable of simultaneous nitrate reduction and Fe(II) oxidation, can be applied for the remediation of nitrate and Fe(II) combined contamination in groundwater. Under strictly anaerobic condition, denitrifying microbial communities were enriched with the coexistence of...

Iron (Fe) is the most abundant redox-active metal ion in the human body, and its redox-active inter-convertible multiple oxidation states contributes to numerous essential biological processes. Moreover, iron overload can potentially cause cellular damage and death, as wel as numerous diseases t...

Surfactants are easily accumulated in groundwater, sediment, and aquifers, due to their excessive use in household, industrial, and agricultural processes. These residual surfactants are expected to influence the transformation and fate of organic contaminants by Fe(II) sorbed on iron oxides in ...

This work investigates the transformation of iodide (I−) by Fe(II)-activated peroxydisulfate (PDS). The transformation of I− into iodate (IO3−) is a two-step process, involving reactive iodine species, such as hypoiodous acid (HOI), as a key intermediate, and IO3− as the final product. In the fi...

The activation of persulfate by Fe(II) coupled with hydroxylamine (the HA/Fe(II)/PS system) was highly effective for the degradation of refractory organic contaminants under acidic pH conditions. However, owing to the precipitation of ferric hydroxide and/or the slow reduction from Fe(III) to Fe...

Both Fe(II) adsorbed onto mineral surfaces and soluble Fe(II) complexes are important natural reductants; however, no research has directly compared their reaction kinetics and mechanisms. In this work, the reduction kinetics of heterogeneous Fe(II)-goethite versus homogeneous Fe(II)-tiron were ...

Due to the great importance of automotive exhaust gas treatment, the catalytic activity was investigated in selective catalytic reduction of NO by propene on Pt films – with controlled microstructure – deposited on YSZ (8 mol% Y2O3-doped ZrO2) by electrostatic spray deposition. This technique ...

The deposition of a platinum electrode on 8 mol% Y2O3-stabilized ZrO2 (YSZ) using the electrostatic spray deposition (ESD) technique was investigated. Films with various morphologies were obtained starting from different precursor solutions based on Pt(NH3)4(OH)2(H2O), PtCl4 and Pt(acac)2 dissol...

It was investigated the lactic acid (LA) production from glycerol in alkaline medium (NaOH) employing platinum (0.5 wt% PtO2) catalysts supported on Al2O3, ZnO and MgO in continuous flow reaction system over a period of 30 h. Besides the effect of catalyst supports, it was studied the influence ...

Continuous indium tin oxide (ITO) films of as low as 10 Ω/□ and up to ~ 2 μm thick were prepared by forming a laminate structure of alternating indium tin complex and ITO nanoparticle layers on a substrate by solution deposition then thermal transformation of the precursor film to ITO. The ch...