Chemistry Journal of Moldova

Graphycal Abstract: Dacryodes edulis seed flour methanol extract (DESME) was analysed for bioactive compounds and antioxidant properties. GC-MS analysis identified fifteen compounds, with 9-Octadecenoic acid as the most prominent. Phytochemical analysis revealed a high phenolic content of 320.68±0.33 GAE mg/g and strong antioxidant inhibition (92.52%).
 

Graphycal Abstract: This review highlights the crucial role of halogen bonding in governing the synthesis, crystal engineering, and supramolecular self-assembly of 1,3,5-triazapentadiene (TAP) metal complexes. It covers synthetic strategies, the σ-hole model, cooperative non-covalent interactions, and diverse functional applications including catalysis and material design.

 

Graphycal Abstract: This paper summarizes data on the chemical composition of groundwater from artesian wells and phreatic wells across various regions of the Republic of Moldova. A comparative analysis of water samples was conducted to identify the parameters that most frequently exceed maximum permissible concentrations for both types of sources. Furthermore, the paper presents research findings on groundwater treatment technologies specifically targeting the removal of ammonia and ammonium ions. 

Graphycal Abstract: Copper(II), syn-2-pyridinealdoxime (PaoH), and 4,4′-bipyridine (bpy) react to form a one-dimensional (1D) cationic coordination polymer. The structure consists of tetranuclear units interconnected by in situ generated PaoH ligands and further extended by bpy linkers. Nitrate anions, DMF, and water molecules are involved in hydrogen-bonding interactions with the metal complex. These intermolecular interactions were analyzed and quantified using Hirshfeld surface analysis.

Graphycal Abstract: The chemical composition of essential oils from Physalis angulata L. fruits from Parkent district was investigated by GC–MS. The n-hexane extract contained 59 compounds (96.3%), predominantly fatty acids, with n-hexadecanoic acid (21.13%) and conjugated linoleic acid (9.46%) as major constituents. The dichloromethane extract contained 34 compounds (80.15%), mainly oxygenated volatiles, including 1-hexanol (24.03%), furfural (6.04%), and 3-hexen-1-ol (5.10%). Solvent polarity influenced extraction selectivity, with n-hexane enriching fatty acids and dichloromethane favouring oxygenated compounds. The dichloromethane extract showed the strongest antimicrobial activity against Bacillus subtilis (19 ± 0.12 mm), while the n-hexane extract was less active. These findings demonstrate that solvent-dependent extraction shapes the chemical composition and antimicrobial potential of P. angulata fruit essential oils.

Graphycal Abstract: Indole based supported metal catalysts were synthesized and applied for selective phenol oxidation using TBHP and H₂O₂. PS-HIMAP-Cu achieved 97.2% conversion with 91.5% catechol selectivity, while PS-HIMAP-Ni offered 96.8% selectivity with H₂O₂. The catalysts demonstrated stability and reusability, providing an efficient platform for phenol valorisation and wastewater treatment.

Graphycal Abstract: A conductive nano-oligomer was synthesized via oxidative polymerization of p-phenylenediamine and catechol in acidic and alcohol medium  using potassium persulfate as oxidizing agent. The material exhibits enhanced thermal stability, electrical conductivity, and nanoscale morphology, making it promising for applications in sensors, energy storage, and advanced functional materials. 
 

 

Graphycal Abstract: New spectrophotometric techniques using charge-transfer reactions between naphthoquinone reagents and spiramycin were developed and validated according to ICH guidelines. These procedures were successfully applied to the analysis of spiramycin in pharmaceutical formulations. The suggested approaches are simple, effective, and trustworthy enough, and highlighting their utility in routine quality control. 

 

Graphycal Abstract: Novel imidazole-functionalized pyridinium-fused selenadiazolium salts were synthesized. X-ray structures display T-shaped selenium centers with Se···Cl/O chalcogen bonding interactions. The monocationic salt assembles into a 1D supramolecular polymer via [Se···Cl] dimerization and Se···N interactions.

 

Graphycal Abstract: Anti-corrosive additives reduce zinc corrosion in alkaline electrolytes, enhancing battery lifespan. Additives optimise electrode kinetics, increasing battery efficiency and overall performance. Citric acid with zinc acetate shows promising anti-corrosive properties. Optimization of additive formulations, scalability, and commercialisation are essential for widespread adoption.