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Insights into the molecular self-assembly of urea-functionalized acetylenes.
Nanotechnology
January 2025
Institute of Nano Science and Technology, Knowledge City, Sector 81, Mohali, 140306, INDIA.
This study investigates simple acetylenes substituted with phenylurea as a constant H-bonding unit (Alk-R) and varied hydrophobic units (R = H, Phenyl (Ph), Phenylacetylene (PA), Ph-NMe2) to understand self-assembly properties driven by synergistic non-covalent interactions. Our observations reveal hierarchical self-assembled fibrillar networks with luminescent needles, fibers, and flowers on nano- to micro-meter scales. Subtle changes in substituents led to significant differences: H, Ph, PA, and Ph-NMe2 produced needle-like crystals, dendritic nanofibers, microflakes, and no self-assembly, respectively.
View Article and Find Full Text PDFCarbazole-Bismaleimide Based Hyper-Cross-Linked Porous Organic Polymer for Efficient Iodine Capture.
Langmuir
January 2025
Department of Chemical Engineering, Canakkale Onsekiz Mart University,17100 Canakkale, Turkey.
Radioactive iodine, a key waste product of nuclear energy, has been a significant concern among nuclear materials because of its high volatility and its ability to easily enter the human metabolism. Porous materials containing a large number of N-heterocyclic units such as carbazole in the skeletons use as effective adsorbents showing high iodine capture capacities. Herein, a new carbazole-bismaleimide-based hyper-cross-linked porous organic polymer (CzBMI-POP) was successfully prepared from a new tetra-armed carbazole-maleimide monomer (Bis-Cz(BMI)), which contains biscarbazole units and maleimide side groups.
View Article and Find Full Text PDFInterplay of Tetrel, Hydrogen, and Halogen Bonds in FGeOCl and HCN Complexes: A Comprehensive Theoretical Study of Dimers, Trimers, and Tetramers.
J Phys Chem A
January 2025
Department of Chemistry and Biochemistry, Shahrood Branch, Islamic Azad University, 36714 Shahrood, Iran.
This study investigates the nature and interplay of noncovalent interactions (NCIs)─tetrel bonds (TB), hydrogen bonds (HB), and halogen bonds (XB)─in molecular assemblies formed between trifluorogermyl hypochlorite (FGeOCl) and hydrogen cyanide (HCN). Using a combination of high-level computational methods, we explored the geometric, energetic, and electronic properties of dimers, trimers, and tetramers formed in different molar ratios of interacting reagents. Various analyses reveal a significant cooperativity between TB and HB, which mutually reinforce each other, while XB interactions are diminished in the presence of TB and HB.
View Article and Find Full Text PDFThe Lanthanide Contraction: What is an Abnormal and Why?
Inorg Chem
January 2025
Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada.
The lanthanide contraction is a widely known phenomenon in which the ionic radii of the Ln ions decrease across the series from La to Lu. As a result, the distance (Ln-Y), where Y is a ligand donor atom, decreases across the series. As shown previously, the decrease normally has a linear dependence on the number of 4f Ln electrons, , and the net change, Δ', is between 0.
View Article and Find Full Text PDFHigh-Conductivity, Self-Healing, and Adhesive Ionic Hydrogels for Health Monitoring and Human-Machine Interactions Under Extreme Cold Conditions.
Adv Sci (Weinh)
January 2025
The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an, 710049, P. R. China.
Ionic conductive hydrogels (ICHs) are emerging as key materials for advanced human-machine interactions and health monitoring systems due to their unique combination of flexibility, biocompatibility, and electrical conductivity. However, a major challenge remains in developing ICHs that simultaneously exhibit high ionic conductivity, self-healing, and strong adhesion, particularly under extreme low-temperature conditions. In this study, a novel ICH composed of sulfobetaine methacrylate, methacrylic acid, TEMPO-oxidized cellulose nanofibers, sodium alginate, and lithium chloride is presented.
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