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Aryl-Acetylene Layered Hybrid Perovskites in Photovoltaics.
Angew Chem Int Ed Engl
January 2025
University of Fribourg Faculty of Science: Universite de Fribourg Faculte de sciences et de medecine, Adolphe Merkle Institue, Chemin des Verdiers 4, 1700, Fribourg, SWITZERLAND.
Metal halide perovskites have shown exceptional potential in converting solar energy to electric power in photovoltaics, yet their application is hampered by limited operational stability. This stimulated the development of hybrid layered (two-dimensional, 2D) halide perovskites based on hydrophobic organic spacers, templating perovskite slabs, as a more stable alternative. However, conventional organic spacer cations are electronically insulating, resulting in charge confinement within the inorganic slabs, thus limiting their functionality.
View Article and Find Full Text PDFSubstituent-Driven Anion-Binding Selectivity in Aliphatic Chain-Substituted 1,2-Phenylene Urea Macrocycles and Optimized Synthetic Methodology.
ChemistryOpen
January 2025
Department of Organic Chemistry, University of Chemistry and Technology Prague, Technická 5, Prague 6, 16628, Czech Republic.
1,2-Phenylene tetraurea macrocycles recently attracted attention as self-assembled channel-making compounds with high selectivity to chlorides. Here, we report on the introduction of aliphatic chains in the periphery of the 1,2-phenylene tetraurea macrocycle, which led to deterioration in the ability of the macrocycle to form channels and to a reversal of anion binding preferences in favour of dihydrogen phosphate. In addition, we have developed a new method of synthesis of 1,2-phenylene tetraurea macrocycle, using a direct click of two diamino ureido derivatives by triphosgene in the presence of chloride template.
View Article and Find Full Text PDFFacile Synthesis of a Pyrovanadate NiVO Hollow Sphere/Reduced Graphene Oxide Nanocomposite as a Solid-State Hybrid Supercapacitor.
ACS Omega
December 2024
Department of Physics, School of Advanced Sciences, Vellore Institute of Technology (VIT) Chennai, Vandalur - Kelambakkam Road, Chennai 600127, India.
Article Synopsis
- Nickel pyrovanadate (NVO) and reduced graphene oxide (rGO) are synthesized together using a solvothermal method, resulting in a crystalline NVO structure and amorphous rGO within the nanocomposite.
- The formation of a hollow nanosphere shape for NVO is observed, which improves surface area and electrochemical stability due to the rGO incorporation.
- The NVO@rGO 20 composite achieves a specific capacitance of 3807 F/g and retains about 70% of its capacitance after 10,000 cycles, making it a promising candidate for high-performance energy storage devices.
Scalable Mechanochemical Synthesis of Biotin[6]uril.
ChemSusChem
January 2025
Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, Tallinn, 12618, Estonia.
Biotin[6]uril, a chiral, water-soluble and anion binding macrocycle, is formed via dynamic covalent chemistry. In this study, we present a scalable and high-yielding synthesis of biotin[6]uril via a mechanochemical solid-state approach. The optimized protocol involves mechanical grinding of solid d-biotin with paraformaldehyde in the presence of 0.
View Article and Find Full Text PDFTemplate-Guided Nondeterministic Assembly of Organosilica Nanodots for Multifunctional Physical Unclonable Functions.
ACS Appl Mater Interfaces
January 2025
Jieyang Branch of Chemistry and Chemical Engineering Guangdong Laboratory, Jieyang 515200, China.
Optical physical unclonable functions (PUFs) are gaining attention as a robust security solution for identification in the expanding Internet of Things (IoT). To enhance the security and functionality of PUFs, integrating multiple optical responses─such as fluorescence and structural color─into a single system is essential. These diverse optical properties enable multilevel authentication, where different layers of security can be verified under varying light conditions, greatly reducing the risk of counterfeiting.
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