Three tricyclic 1,2-dioxetane derivatives, 1a, 2a and 3a were synthesized from their corresponding 1,4-dioxin acenaphthylene compounds, 1, 2 and 3, by reaction with singlet-oxygen ((1) O2 ) in dichloromethane. Evidence for the formation of the dioxetanes 1a, 2a and 3a is provided by the chemiluminescence (CL) that corresponds to the emission from the electronically excited diesters 1b*, 2b* and...

In the oil-rich Niger Delta, hydrocarbon pollution and oil spillages, gas flaring and sundry anthropogenic activities constitute sources of polycyclic aromatic hydrocarbons (PAHs), with food contamination playing a major role in human exposure. In this study we assessed PAH levels in wild and cultivated edible mushroom species consumed by the general population from the oil producing Niger Delt...

An application of the Reaction Class Transition State Theory/Linear Energy Relationship (RC-TST/LER) is presented for the evaluation of the thermal rate constants of hydrogen abstraction reactions by H atoms from Polycyclic Aromatic Hydrocarbons (PAH). Two classes of reactions have been considered, namely hydrogen bonded to sixand five-membered rings, respectively, and twenty-two reactions have...

Five novel ruthenium(II) complexes, [Ru(dtzp)(dppt)](2+) (1), [Ru(dtzp)(pti)](2+) (2), [Ru(dtzp)(ptn)](2+) (3), [Ru(dtzp)(pta)](2+) (4) and [Ru(dtzp)(ptp)](2+) (5) (where dtzp = 2,6-di(thiazol-2-yl)pyridine, dppt = 3-(1,10-phenanthroline-2-yl)-5,6-diphenyl-as-triazine), pti = 3-(1,10-phenanthroline-2-yl)-as-triazino-[5,6-f]isatin, ptn = 3-(1,10-phenanthroline-2-yl)-as-triazino[5,6-f]naphthalene...

Finding an appropriate method with the highest rate of polycyclic aromatic hydrocarbon (PAH) removal from naturally polluted soils is important research issue. A pot factorial experiment (using contaminated soil samples Isfahan Refinery, Iran) was conducted in a 90-day period to compare following bioremediation strategies: (1) natural attenuation (NA): inherent ability for bioremediation; (2) b...

Polycyclic aromatic hydrocarbons (PAHs) were detected in different types of PAH-containing samples collected Lake Baikal during wildfires the adjacent areas. The set studied included following: (i) water from upper layer (5 m); (ii) surface microlayer; (iii) lake tributaries; (iv) deep layers (400 and (v) aerosol near-water layer. Ten PAHs samples: naphthalene, 1-methylnaphthalene, 2-methylnaph...

Abstract The purpose of this study was to evaluate the concentration PAHs and health risk in edible mushrooms using magnetic solid phase extraction (MSPE) gas chromatography/mass spectrometry (GC/MS) method. Based on results, total range from 0.82 6.25 µg/kg (with means 3.85 ± 0.24 µg/kg). In study, acenaphthylene (Ace) had maximum mean level mushroom samples (0.84 0.19 μg/kg) benzo(a)pyrene (B...

Aromatic hydrocarbons present in Iraqi national surface water were believed to be raised principally from combustion of various petroleum products, industrial processes and transport output their precipitation on water.Polycyclic aromatic (PAHs) included the priority pollutant list due toxic carcinogenic nature. The concern about contamination consequent human exposure have encouraged developme...