Smart design of highly luminescent octupolar mesogenic tetra styryl-alkynyl bipyrimidine-based chromophores presenting n...
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status: published
Biocompatible, Europium-Doped Fluorapatite Nanoparticles as a Wide-Range pH Sensor.
Published in Journal of fluorescence
The development of a simple, biocompatible, pH sensor with a wide range of detection, using a single fluorescent probe is highly important in the medical field for the early detection of diseases related to the pH change of tissues and body fluids. For this purpose, europium-doped fluorapatite (FAP: Eu) nanoparticles were synthesized using the copr...
Ancient Secretory Pathways Contributed to the Evolutionary Origin of an Ecologically Impactful Bioluminescence System.
Evolutionary innovations in chemical secretion-such as the production of secondary metabolites, pheromones, and toxins-profoundly impact ecological interactions across a broad diversity of life. These secretory innovations may involve a legacy-plus-innovation mode of evolution, whereby new biochemical pathways are integrated with conserved secretor...
A Fluorescent Chemosensor for Detection pH and Cu2+ Ion Base on 7-((2-Aminoethyl)amino)-5-Bromo-6-Hydroxy-1-Methylquinol...
Published in Journal of fluorescence
A quinoline derivative 7-((2-aminoethyl)amino)-5-bromo-6-hydroxy-1-methylquinolin-1-ium-3-sulfonate (QEt) containing quinoline ring, - SO 3 - sulfonate, -OH phenol, and amine groups was synthesized and studied luminescence properties. The aqueous solutions QEt 10µM change luminescence color from green (λem = 490 nm) to yellow (λem = 563 nm) as incr...
Élaboration de matériaux composites à base de polyoxométallates : photocommutateurs moléculaires et thermomètres lumines...
Les polyoxométallates (POMs) sont des clusters anioniques d'oxydes métalliques possédant une grande richesse structurale et chimique et présentant des propriétés multiples en catalyse, biologie ou encore en optique. L'association de POMs à d'autres entités chimiques peut conduire à des matériaux composites dotés de fonctionnalités nouvelles induite...
Large and Versatile Plasmonic Enhancement of Photoluminescence Using Colloidal Metallic Nanocubes
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Improving phosphor photoluminescence efficiency is a key parameter to boost the performances of many optical devices. In this work, colloidal silver nanocubes, homogeneously spread on a luminescent surface, have proved to help both injecting and extracting light in and out of the photoluminescent layer and hence contributed significantly to the enh...
Multi-method dating reveals 200 ka of Middle Palaeolithic occupation at Maras rock shelter, Rhône Valley, France
The emergence of the Middle Palaeolithic, and its variability over time and space are key questions in the field of prehistoric archaeology. Many sites have been documented in the south-eastern margins of the Massif central and the middle Rhône valley, a migration path that connects Northern Europe with the Mediterranean. Well-dated, long stratigra...
Trivalent Gd incorporated Zn2SiO4 phosphor material for EPR and luminescence investigations
Published in International Journal of Materials Research
Zn2SiO4:Gd3+ powder was obtained by the sol–gel preparation technique and then characterized by using Fourier-transform infrared spectroscopy and X-ray diffraction techniques. The sample exhibited photoluminescence in the ultraviolet spectral zone with a maximum emission wavelength of 314 nm. Ultraviolet emission in the range of 305–320 nm is also ...
Geometrical Characterization of an Inorganic Scintillator Detector for Proton Therapy using a Micrometer Scale Ion Beam
The fabrication process of an Inorganic Scintillator Detector (ISD), grafted at the tip of an optical fiber, is currently under optimization for its application in proton therapy in-vivo dosimetry. The detector signal magnitude under proton irradiation is strongly correlated to the geometry of the detector-sensitive head and must be accurately char...
Yb-to-Eu Cooperative Sensitization Upconversion in a Multifunctional Molecular Nonanuclear Lanthanide Cluster in Solutio...
Lanthanide metal clusters excel in combining molecular and material chemistry properties. Here, we report an efficient cooperative sensitization UC phenomenon of a Eu3+/Yb3+ nonanuclear lanthanide cluster in CD3OD. The synthesis and characterization of the heteronuclear cluster in the solid state and solution are described together with the UC phen...
