Chemistry Journal of Moldova

Accepted papers

Emmy Yuanita, Harno Dwi Pranowo, Mustofa Mustofa, Respati Tri Swasono, Jufrizal Syahri, Jumina Jumina

Field: Organic chemistry
Type: Research paper
9
chlorination, chloro-substituted hydroxyxanthone, derivative, anticancer, molecular docking.
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Graphical Abstract: In this study, the chloro-substituted hydroxyxanthones were prepared by cyclodehydration of acid derivatives and substituted phenol in the presence of Eaton reagent, followed by halogenations step to electrophilic substitution of chlorine in a moderate yield. The in vitro anticancer activity study on various cell lines revealed that the chloro functional group increases the anticancer activity of the hydroxyxanthone derivatives. The molecular docking study showed that there was a binding interaction between chloro-hydroxyxanthone and the amino acid residues such as Asp810, Cys809, Ile789, His790, and Leu644 of protein tyrosine kinase receptor (1T46.pdb).


 

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Ion Arsene, Natalia Gorinchioy

Field: Physical chemistry and chemical physics
Type: Research paper
10
Fenton reaction, H2O2 decomposition, DFT calculations
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Graphical Abstract: The reaction cycle of H2O2 decomposition and O2 generation catalyzed by Fenton reagent was studied using density functional theory calculations. A four-stage mechanism for the oxygen production and the Fe2+ regeneration in the Fenton reaction is proposed based on the obtained results. It is shown that the O-O bond cleavage of coordinated H2O2at the first step of reaction does not lead to a free HO radical. Instead, a highly reactive intermediate [FeIV(H2O)4(OH)2]2+ with two HO radicals “trapped” in the complex is formed. The result of the next two reaction steps is the formation of the two HO2 radicals which can react on the triplet energy surface in order to produce O2 and a H2O2.


 

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Viktoria Vorobyova, Margarita Skіba

Field: Physical chemistry and chemical physics
Type: Research paper
11
apricot cake extract, self-assembled layer, green corrosion inhibitor, steel, organic coating.
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Graphical Abstract: The protection performance of self-assembled layers (SALs) formed by apricot cake extract (ACE) on the surface of steel has been studied. Characterization of the apricot cake extract was carried out using the gas chromatography-mass spectrometry analysis. The anti-corrosion effect of the self-assembled layers was determined by weight loss experiments, scanning electron microscopy and electrochemical methods. It was revealed that the protection ability of the SALs is determined by the time of film formation on the steel surface. The maximal corrosion inhibition efficiency (about 93%) was obtained after 48 h process of film formation in the vapour phase of the apricot cake extract. The results of the polarization test revealed that the ACE acted as a mixed type inhibitor and retarded both anodic and cathodic reactions rates. The results of the electrochemical analysis revealed that the ACE modified steel showed better corrosion protection in conditions of periodic condensation of moisture.
 


protection in conditions of periodic condensation of moisture.

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Chidi Edbert Duru

Field: Ecological chemistry
Type: Research paper
7
mechanic village, heavy metal, degree of contamination, index of geo-accumulation.
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Graphical Abstract: Toxic heavy metals within a reclaimed section of the Orji mechanic village in Nigeria were determined using X-ray fluorescence and atomic adsorption spectrophotometric methods. The data were analyzed using geo-statistical techniques. Results showed high degree of contamination by cadmium and arsenic, and strong to extreme contamination by lead and cadmium.


 


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