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High-Sensitivity Fluorescent Sensing Platform for Rapid and Selective Detection of Chlorpyrifos Pesticide in Water Samples Using Terbium-Isatin-3-allyl Complex.
J Fluoresc
January 2025
Department of Chemistry, Faculty of Science, Suez Canal University, Ismailia, 41522, Egypt.
The detection of organophosphorus pesticides, particularly chlorpyrifos, in environmental samples is essential due to their widespread use and associated health risks. In this study, we developed a high-sensitivity fluorescent sensing platform utilizing an Isatin-3-allyl-terbium (IS-Tb) complex in solution for the rapid and selective detection of chlorpyrifos in various water samples. The proposed chemical structure of the complex in solution was evaluated using molar ratio method.
View Article and Find Full Text PDFThe Influence of Temperature and Stoichiometry on the Optical Properties of CdSe Nanoplatelets.
Nanomaterials (Basel)
November 2024
Institute of Physical and Technical Sciences, L.N. Gumilyov Eurasian National University, 13 Kazhymukan st., 010000 Astana, Kazakhstan.
Colloidal quasi-two-dimensional cadmium chalcogenide nanoplatelets have attracted considerable interest due to their narrow excitonic emission and absorption bands, making them promising candidates for advanced optical applications. In this study, the synthesis of quasi-two-dimensional CdSe NPLs with a thickness of 3.5 monolayers was investigated to understand the effects of synthesis temperature on their stoichiometry, morphology, and optical properties.
View Article and Find Full Text PDFLatitudinal patterns in ocean C:N:P reflect phytoplankton acclimation and macromolecular composition.
Proc Natl Acad Sci U S A
November 2024
Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, MA 02139.
Article Synopsis
- The study examines how the ratios of carbon, nitrogen, and phosphorus (C:N:P) in ocean particulate matter differ from the standard Redfield Ratio, impacting global carbon storage as these particles sink into the deep ocean.
- Researchers found distinct latitudinal patterns in C:N:P ratios along a transect in the North Pacific, linking these patterns to the composition of macromolecules like proteins, carbohydrates, and lipids in oceanic particles.
- The findings suggest that changes in phytoplankton community structure and nutrient availability are key factors driving variations in these ratios, indicating that physiological acclimation to nutrient supply is likely responsible for the observed latitudinal trends.
Nonstoichiometry as a hidden aspect of TbAl(BO) optical properties.
Dalton Trans
November 2024
Sobolev Institute of Geology and Mineralogy SB RAS, Novosibirsk 630090, Russia.
TbAl(BO) should not be considered as a strictly stoichiometric compound. A variety of TbAl(BO) ( = -0.1-0.
View Article and Find Full Text PDFHighly stoichiometry-deviating chalcopyrite quantum dots: synthesis and copper defects-correlated photophysical properties.
Nanotechnology
August 2024
Key Laboratory of Quantum Materials and Devices of Ministry of Education, School of Physics, Southeast University, Nanjing 211189, People's Republic of China.
Copper indium selenide (CISe) is a prototype infrared semiconductor with low toxicity and unique optical characteristics. Its quantum dots (QDs) accommodate ample intrinsic point defects which may actively participate in their rather complex photophysical processes. We synthesize CISe QDs with similar sizes but with distinct highly stoichiometry-deviating atomic ratios.
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