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The octahedral rhenium cluster compound NaH[{ReSe}(P(CHCONH)(CHCOO))] has recently emerged as a very promising X-ray contrast agent for biomedical applications. However, the synthesis of this compound is rather challenging due to the difficulty in controlling the hydrolysis of the initial P(CHCN) ligand during the reaction process. Therefore, in this report we compare the and toxicity of NaH[{ReSe}(P(CHCONH)(CHCOO))] with those of related compounds featuring the fully hydrolysed form of the phosphine ligand, namely NaH[{ReQ}(P(CHCOO))] (Q = S or Se). Our results demonstrate that the cytotoxicity and acute toxicity of the complex NaH[{ReSe}(P(CHCONH)(CHCOO))] solutions were considerably lower than those of compounds with the fully hydrolysed ligand P(CHCOOH). Such behavior can be explained by the higher osmolality of NaH[{ReQ}(P(CHCOO))] NaH[{ReSe}(P(CHCONH)(CHCOO))].
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http://dx.doi.org/10.1039/c7tx00083a | DOI Listing |
Colloids Surf B Biointerfaces
September 2025
Institute of Bismuth and Rhenium Science, University of Shanghai for Science and Technology, Shanghai 200093, China; USST-UH International Joint Laboratory for Tumor Diagnosis and Energy Treatment, University of Shanghai for Science and Technology, Shanghai 200093, China.
Doxorubicin (DOX), a widely used chemotherapeutic agent, is severely limited by systemic toxicity. Conventional nanomaterials exhibit limited drug-carrying capacity and targeted delivery efficiency, while the biocompatibility of these materials remains a critical consideration. Here we report a novel type of superhydrophilic mesoporous nanomaterial, synthesized by combining bismuth and 2-methylimidazole (Bi-MEI), designed as a biocompatible and pH-sensitive drug carrier for the delivery of the anticancer drug DOX to combat tumor proliferation and metastasis.
View Article and Find Full Text PDFMolecules
December 2024
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Ta/Re layered composite material is a high-temperature material composed of the refractory metal tantalum (Ta) as the matrix and high-melting-point, high-strength rhenium (Re) as the reinforcement layer. It holds significant potential for application in aerospace engine nozzles. Developing the Ta/Re potential function is crucial for understanding the diffusion behavior at the Ta/Re interface and elucidating the high-temperature strengthening and toughening mechanism of Ta/Re layered composites.
View Article and Find Full Text PDFTo measure the combustion parameters of a solid propellant, this Letter researches the fitting method for flame temperature and emissivity based on multispectral images and proposes the particle swarm optimization-K-means (PSO-K-means) clustering optimization algorithm of a flame multispectral image. Considering the difference in flame radiation characteristics in different regions, the flame multispectral image is clustered, and spectra in different regions are analyzed and selected in different fitting bands to inverse temperature and emissivity. On this basis, the method is applied to measure solid propellant combustion parameters with different formulations.
View Article and Find Full Text PDFInorg Chem
November 2024
Department of Chemistry, University of California, Berkeley, California 94720, United States.
The synthesis of actinide tetrarhenate complexes completes a series of iridate, osmate, and rhenate polyhydrides, allowing for structural and bonding comparisons to be made. Computational studies examine the bonding interactions, particularly between metals, in these complexes. Several factors─including metal oxidation state, coordination number, and dispersion effects─affect metal-metal distances and covalency in these actinide tetrametallates.
View Article and Find Full Text PDFRapid Commun Mass Spectrom
December 2024
A. N. Frumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Moscow, Russia.