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Molecules

Molecules is the leading international, peer-reviewed, open access journal of chemistry.
Molecules is published semimonthly online by MDPI. The International Society of Nucleosides, Nucleotides & Nucleic Acids (IS3NA), the Spanish Society of Medicinal Chemistry (SEQT) and the International Society of Heterocyclic Chemistry (ISHC) are affiliated with Molecules and their members receive a discount on the article processing charges.
Indexed in PubMed | Quartile Ranking JCR - Q2 (Biochemistry and Molecular Biology | Chemistry, Multidisciplinary)

All Articles (61,854)

Electromagnetic wave interference has escalated into a pervasive global issue, driving intensified research efforts across both civilian and military domains. However, the development of advanced electromagnetic wave (EMW) absorbers with finely tunable dielectric and magnetic loss properties has emerged as a pivotal strategy for mitigating electromagnetic pollution. Herein, we propose a cation engineering strategy to tailor the absorption properties of ZIF-67-derived layered double hydroxide (LDH) composites through systematic substitution of Co2+ with Fe, Mn, Zn, or Ni and stoichiometric control (Co/X = 1:4, 1:1). Mn/Zn doping enhances dipole polarization via lattice distortion, while structural analysis confirms that higher Co/X ratios preserve core–shell architectures, optimizing impedance matching. In contrast, Fe incorporation leads to excessive conductivity and impedance mismatch. The optimized CoNi1-4 composite exhibits superior broadband absorption (EAB = 4.52 GHz at 1.8 mm thickness, RLmin = −24.5 dB), attributed to synergistic interface polarization and magnetic coupling. This study delivers a highly tailorable materials platform that enables a deeper fundamental understanding of the synergy between dielectric and magnetic loss processes, thereby offering new pathways for optimizing electromagnetic wave absorption.

13 November 2025

Synthesis of ZIF-67/CoX-LDH derived composites.

Fungal polysaccharides represent a structurally diverse group of bioactive compounds with increasing recognition for their hepatoprotective potential. This review synthesizes current evidence on their roles in the prevention and treatment of liver diseases, including alcohol-related liver disease (ALD), metabolic dysfunction-associated fatty liver disease (MAFLD), or toxin-induced injury. The analyzed studies demonstrate that polysaccharides isolated from species such as Lentinula edodes, Grifola frondosa, Ganoderma lucidum, Coriolus versicolor, and Cordyceps militaris exert beneficial effects by reducing oxidative stress, attenuating inflammation, and improving metabolic homeostasis. Mechanistically, these effects are mediated through the regulation of multiple signaling pathways, including Nuclear Factor kappa-light-chain-enhancer of activated B cells (NF-κB), Nuclear factor erythroid 2–related factor 2 (Nrf2), and NOD-like receptor protein 3 (NLRP3) inflammasome, as well as modulation of gut microbiota. Fungal polysaccharides were also shown to improve hepatic function by lowering serum biomarkers of liver injury and ameliorating histopathological damage. Presented evidence indicates that fungal polysaccharides possess considerable potential as multifunctional hepatoprotective agents, highlighting the need for further mechanistic insight and clinical validation.

13 November 2025

Effects of the fungal polysaccharide processes through regulation of TLR4/NF-κB pathway. Abbreviations: Acc: Acetyl-CoA Carboxylase; ADH: alcohol dehydrogenase; Akt: The protein kinase B; ALDH: acetal dehydrogenase; ALP: alkaline phosphatase; ALT: alanine aminotransferase; AMPK: AMP-activated protein kinase; AST: aspartate aminotransferase; CAT: catalase; Cd14: Cluster of Differentiation 14; Cox2: Cyclooxygenase-2; Cyp: cytochrome P450; GGT: Gamma-Glutamyl Transferase; GSH-Px: glutathione peroxidase; GSK3β: cascade glycogen synthase kinase 3 beta; HO-1: Heme Oxygenase-1; IFN: interferon; IL: interleukin; iNos: Inducible Nitric Oxide Synthase; IκBα: inhibitor of κBα; JNK: c-Jun N-terminal kinase; Lbp: Lipopolysaccharide Binding Protein; LDH: lactate dehydrogenase; LPO: lipid peroxidation; Mcp-1: monocyte chemoattractant protein-1; MDA: malondialdehyde; MPO: myeloperoxidase; MyD88: Myeloid differentiation primary response 88; NF-κB: Nuclear Factor kappa-light-chain-enhancer of activated B cells; PI3K: Phosphoinositide 3-Kinase; p-NF-κB p65: phosphorylated NF-κB, p65 subunit; PPARα: Peroxisome Proliferator-Activated Receptor Alpha; Ptp1b: Protein Tyrosine Phosphatase 1B; Socs2: Suppressor of Cytokine Signaling 2; SOD: superoxide dismutase; T-AOC: Total Antioxidant Capacity; TLR4: Toll-like receptor 4; Tnfα: Tumor Necrosis Factor alpha; ZO-1: zonula occludens-1. Created in BioRender. Bijak, M. (2025) https://BioRender.com/0iwpkmp (accessed on 27 October 2025).

Ion-Selective Properties of Armbrusterite Mineral and the Prospects for Its Laboratory Synthesis

  • Darya Gryaznova,
  • Taras Panikorovskii and
  • Galina Kalashnikova
  • + 5 authors

In this paper, results of studying the properties of armbrusterite, a natural heterophyllosilicate, are presented. Due to its crystal structure consisting of parallel HOH-type sheets separated by a network of large-diameter (4–6 Å) channels, this mineral is of interest as a prototype for producing novel compounds to be used as sorbents. The studies were conducted by X-ray powder diffraction and X-ray single crystal diffraction analyses, electron microscopy, and IR spectroscopy. The natural sample is shown to be able to selectively extract monovalent cations from the solution of complex composition consisting of mono- and divalent salts. Furthermore, the preliminary results of hydrothermal synthesis of an analog of this mineral are reported. It is demonstrated that the mineral can be produced under milder conditions than the known methods for synthesizing heterophyllosilicates using platinum capsules (Tuttle bombs) at 380–450 °C.

13 November 2025

A sample of natural armbrusterite (1) on calcite (2) (the photo was provided by G.Yu. Ivanyuk).

Oil from Cornelian Cherry Kernels

  • Anna Bieniek,
  • Iwona Szot and
  • Grzegorz P. Łysiak

The utilization of post-production and post-processing by-products aligns with current trends in sustainable fruit industry practices. Recovering valuable nutrients from such materials holds significant potential for the food, nutraceutical, pharmaceutical, and cosmetic sectors. Among these, cornelian cherry (Cornus mas L.) seeds represent a promising source of functional ingredients, particularly due to their oil’s rich nutritional and phytochemical profile. The seeds, accounting for approximately 9–10% of the fruit mass, yield an oil characterized by high levels of polyunsaturated fatty acids—mainly linoleic acid (≈67.5%) and oleic acid (≈20%)—alongside palmitic (≈5.8%) and stearic acids (≈2.1%). Linolenic acid content, however, shows notable variability (1.4–14.7%), influencing the oil’s omega-6/omega-3 ratio, which generally remains below 5:1. Cornelian cherry seed oil stands out among other stone fruit oils (e.g., rosehip, apricot, peach, cherry, plum) for its favorable fatty acid composition and absence of cyanogenic glycosides, making it safe for human consumption. Beyond its nutritional value, this oil exhibits biological activity and health-promoting potential, suggesting wide applicability in functional foods and nutraceutical formulations. Despite progress in characterizing seed composition—including proteins, lipids, carbohydrates, minerals, and tannins—knowledge gaps persist regarding the transfer of these compounds into the oil, particularly under cold-pressing conditions. Future studies should focus on optimizing extraction processes, assessing thermal treatment effects, and clarifying the variability of linolenic acid. Such research will support the sustainable exploitation of cornelian cherry by-products and the industrial-scale development of this high-value oil.

13 November 2025

Flowchart illustrating the literature selection process for the review.

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An Interplay of Noncovalent Interactions (Volume II)
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Molecules - ISSN 1420-3049