Chemistry Journal of Moldova

Graphycal Abstract: Volatile compounds in three Moldovan brined cheeses were characterized by HS-SPME-GC-MS. MBC-1 showed a high relative area of 2-butanone (25.85±1.51%), whereas MBC-2 was characterized by butanoic acid (23.89±0.17%) and a dominant unresolved acid-related signal at RT 24.66 min (46.02±2.77%). MBC-3 contained comparatively high relative areas of 3-methyl-1-butanol (24.17±6.26%), 3-methylbutanoic acid (11.21±0.60%) and 2-phenylethanol (7.44±3.04%). The observed differences represent preliminary product-specific volatile profiles and cannot be attributed independently to milk origin or processing conditions.

 

Graphycal Abstract: Natural Deep Eutectic Solvents (NADES) have been employed to extract per- and polyfluoroalkyl substances (PFAS), tire wear particles, microplastics, and other persistent organic pollutants from aquatic environments. This review discusses regeneration strategies essential to advancing circular economy principles and examines the regulatory landscape driving innovation in this field. NADES represent a paradigm shift in sustainable water treatment by offering a technically viable, economically competitive, and environmentally benign approach to remediate persistent contamination in aquatic systems. Nevertheless, further research is required to address scalability, long-term performance, and regulatory considerations prior to widespread commercialization.

 

Graphycal Abstract: Ephedra alata subsp. alenda essential oil from Bechar (Southwest Algeria) was characterized by GC-MS and evaluated for antioxidant and anti-inflammatory activities. Rich in β-pinene, α-terpinyl acetate, and limonene, it exhibited significant bioactivity and a distinct transitional chemotype compared with regional populations, supporting its traditional medicinal use.

 

Abstract (PDF)

Supplementary Material (PDF)

Graphycal Abstract: Rational control of the optical properties of azulene-based photoswitches requires a detailed understanding of how molecular functionalization influences their electronic structure. DFT calculations have been used to investigate azulenyl dithienylcyclopentenes bearing CHO substituents in comparison to experimental spectra. The calculated absorption and emission spectra agree with experimental ones and reveal that extension of the π-conjugated framework is the primary origin of the bathochromic shifts, whereas substituents progressively tune molecular polarization. Frontier molecular orbital and natural transition orbital analyses show that the electronic excitations remain predominantly π→π* with increased locally excited/intramolecular charge-transfer character, rather than evolving into fully separated charge-transfer states. These findings establish substituent engineering as an effective strategy for tailoring the photophysical response of azulene-based molecular photoswitches while preserving their characteristic anti-Kasha fluorescence.

Graphycal Abstract: The article presents a concept for the development of low-temperature supported metal complex catalysts based on carriers of various origins for the neutralization of gaseous toxic substances. Systematic approaches were developed for the targeted search for new catalysts using natural resources of Ukraine. A synergistic effect of palladium(II) and copper(II) compounds was revealed not only in carbon monoxide oxidation reactions but also in the oxidation of phosphine and sulfur dioxide, as well as in ozone decomposition. The advantages of the newly developed copper-palladium catalysts compared to hopcalite catalysts were demonstrated.

https://doi.org/10.19261/cjm.2026.1514

Graphycal Abstract: DFT and NBO analyses reveal how axial methoxo and hydride ligands, together with overall charge, reshape cobalt porphyrin geometry, donor-acceptor bonding, spin distribution, and frontier orbitals. Methoxo coordination is charge-sensitive, whereas hydride bonding remains structurally robust but electronically reorganized upon reduction.

Graphycal Abstract: 3-Anilinomethylpropionate was evaluated as a corrosion inhibitor for mild steel in 0.5 M H₂SO₄ using weight loss, polarization resistance, Tafel polarization, and impedance spectroscopy techniques. The compound exhibited mixed-type inhibition with 96.5% efficiency at 70 ppm. Increasing inhibitor concentration enhanced charge transfer resistance while reducing double-layer capacitance, confirming effective surface adsorption and corrosion protection.