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High red luminescence intensity under sunlight exposure of a PMMA polymer doped with a tetrakis Eu β-diketonate complex containing a benzimidazolium counterion.
RSC Adv
January 2025
Department of Fundamental Chemistry, Institute of Chemistry, University of São Paulo 05508-000 São Paulo SP Brazil
Article Synopsis
- New tetrakis Eu and Gd β-diketonate complexes with benzimidazolium as a counterion were synthesized using a one-pot method, and one specific complex was incorporated into a PMMA matrix showing excellent photonic features.
- Characterization techniques like ESI-MS, FTIR, and X-ray diffraction were used to analyze the complexes, revealing unique intermolecular interactions and stability of the PMMA-doped material at high temperatures.
- The study highlighted that the materials exhibited strong photoluminescence with significant red emission when exposed to various UV wavelengths and sunlight, suggesting their potential as efficient light-converting molecular devices.
Kinetic and Affinity Profiling Rare Earth Metals Using a DNA Aptamer.
J Am Chem Soc
January 2025
Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
Rare earth elements (REEs) are widely used in various high-tech industries. Developing affinity ligands that can detect and distinguish REEs is at the forefront of analytical chemistry. It is also interesting to understand the limits of natural biomolecules for the recognition of REEs.
View Article and Find Full Text PDFUse of Luminescence Modulation in a New Series of Mixed Lanthanide Metal-Organic Frameworks for Selective Firearm Ammunition Marking.
ACS Omega
December 2024
Grupo de QuÃmica de Coordenação e Espectroscopia de LantanÃdeos (GQCEL), Instituto de QuÃmica, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, RJ 20550-013, Brazil.
Article Synopsis
- Metal-organic frameworks (MOFs), particularly mixed lanthanide MOFs (m-LnMOFs), are complex compounds that combine different lanthanide ions for tunable luminescence across the visible spectrum.
- Researchers have developed a new series of m-LnMOFs using 1,2,4,5-benzenetetracarboxylic acid, with detailed characterization and photophysical studies conducted.
- These m-LnMOFs have high thermal stability and multicolored emissions, making them useful as selective ammunition markers for forensic identification and improving ammunition trade regulation.
Suppression of Bone Formation and Resorption by the Deletion of Complex Gangliosides.
In Vivo
December 2024
Department of Pharmacology, School of Dentistry, Aichi Gakuin University, Nagoya, Japan;
Background/aim: Gangliosides regulate bone formation and resorption. Bone formation is reduced in mice lacking ganglioside GM2/GD2 synthase due to a decrease in osteoblasts. However, the effects of the loss of complex gangliosides by the deletion of both GM2/GD2 and GD3 synthases are unknown.
View Article and Find Full Text PDFZinc Sensing with Pyridine-Based Lanthanide Contrast Agent: Structural Analysis in Aqueous Solution.
Chemistry
December 2024
CNRS, Centre de Biophysique Moléculaire, Rue Charles Sadron, 45071, Orléans, FRANCE.
Zinc is an important physiological cation, and its misregulation is implicated in various diseases. It is therefore important to be able to image zinc by non-invasive methods such as Magnetic Resonance Imaging (MRI). In this work, we have successfully synthesized a novel Gd3+-based complex specifically for Zn2+ sensing by MRI.
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