📄 chemistry

Four Decades of Reversed-Flow Gas Chromatography Research (1980–2026): A Bibliometric Analysis, Knowledge Evolution, and Emerging Scientific Frontiers

This study presents a comprehensive bibliometric analysis of 914 Reversed-Flow Gas Chromatography (RF-GC) publications from 1980 to 2026, mapping the field's evolution from fundamental investigations to advanced material applications and identifying future research frontiers in computational integration and data-driven characterization.

Mohammad Hafiz Hamzah, Khalisanni Khalid2026-06-24
📄 chemistry

Reversible covalency reprograms CRBN substrate recruitment and PROTAC-mediated degradation

This study demonstrates that boronic acid-based IMiD derivatives engage the CRBN E3 ligase via reversible covalent coordination with His353, a mechanism that reshapes substrate recruitment and enables the development of highly efficacious PROTACs with sustained degradation capabilities.

Ivan Dikic, Henry Bailey, Thomas Geiger, Serhii Zhersh, Nataliya Tolmachova, Vinay Singh, Ina Dressel, Rubina Kazi, Jona (…)2026-06-24
📄 chemistry

Topology-Driven Photoenhanced Gold Recovery in Three-Dimensional Covalent Organic Frameworks

This study demonstrates that topological engineering in 3D porphyrin-based covalent organic frameworks can significantly enhance photo-driven gold recovery by optimizing charge transport and mass transfer, with an interdigitated lattice structure outperforming its isomer to achieve record-breaking adsorption capacity.

Shuai Fu, Yunyu Guo, Yuan-Zhe Cheng, Jiaqi Guo, Jiahuan Wang, Aowei Lv, Jingyang Lin, Jiaqi Ma, Mischa Bonn, Xuesong Din (…)2026-06-24
📄 chemistry

Concentration and pH Influence on the Radical Scavenging Activity of Black Tea Polyphenols: Implications for pH-Responsive Antioxidant Materials

This study demonstrates that the radical-scavenging activity of Golestan black tea polyphenols is significantly enhanced at lower pH levels and higher concentrations, with DFT analysis confirming their strong electron- and hydrogen-donating capabilities for potential use in pH-responsive antioxidant materials.

Shadi Ghezelbash, Radin Qashghai, Sahel Mesdaghi, Maryam Ferdousi2026-06-24
📄 chemistry

Comparative phytochemical profiling and bioactivities of wild Thymus species from Mount Ida (Kazdağı)

This study provides the first integrated phytochemical and biological characterization of four wild *Thymus* species from Mount Ida (Kazdağı), revealing that *Thymus citriodorus* exhibits the highest antioxidant capacity, rosmarinic acid and thymol are the dominant phenolic and volatile compounds respectively, and all four species demonstrate significant antimicrobial activity against specific pathogens and concentration-dependent cytotoxicity against HT29 colorectal cancer cells.

Ümmügülsüm TÜKENMEZ EMRE, Muhammed GÜNGÖREN, Ramazan GÜNDOĞDU, Mustafa Yunus EMRE2026-06-24
📄 chemistry

Designing a pilot plant for treating condensed acid tar produced in oil re-refining factories as a feedstock of bitumen-based materials and catalytic cracking units

This paper presents the design and optimization of a pilot plant for treating condensed acid tar and spent clay from oil re-refining, utilizing water/oil emulsification and solvent extraction to separate components for conversion into bitumen-based materials and hydrocarbons via cracking, ultimately proposing a comprehensive industrial complex for integrated waste management and energy recovery.

Morteza Kazemitabar, Mohammad reza Toosi, Shahla Fathi2026-06-24
📄 chemistry

Mechanical constraint enables room temperature near infrared emission and triplet reactivity in nickel(II) chromophores

By employing a rigid macrocyclic ligand to mechanically constrain structural distortion in square planar nickel(II) complexes, this study achieves room-temperature near-infrared emission and long-lived triplet reactivity, effectively overcoming the non-radiative decay limitations typical of first-row transition metal chromophores.

Jun-Long Zhang, Ruijing Zhang, Zi-Yi Tang, Guangliu Ran, Zi-Cheng Wang, Nan She, Wenkai Zhang, Jing Zhang2026-06-24
📄 chemistry

A Minimal Sphere Model for the Emergence of VSEPR-Like Molecular Geometries

This paper demonstrates that familiar VSEPR-like molecular geometries, such as trigonal-bipyramidal and icosahedral arrangements, can emerge from a minimal geometric model where interacting nodes on a sphere are optimized for repulsion, suggesting that much of molecular geometry's descriptive structure arises from a single optimization principle rather than complex bonding rules.

Vladimir V. Yakovlev2026-06-24
📄 chemistry

Influence of Polymer Stabilizers on the Antimicrobial Efficacy of Zinc Oxide Nanoparticles

This study demonstrates that synthesizing zinc oxide nanoparticles with chitosan or polyvinyl pyrrolidone stabilizers yields nanocomposites with enhanced antimicrobial efficacy against various pathogens, with the chitosan-based variant showing superior performance due to synergistic effects involving reactive oxygen species generation and ion release.

Abothur Ghanim Almohanna, Thualfeqar Almohanna, Che Azurahanim, entidhar khmees2026-06-24✓ Author reviewed