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Determination of cell constants. Starting point for reflex search: Random number triplet相似文献
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Fast radiochemical separation of carrier-free212Pb–212Bi–208Tl in radioactive equilibrium was performed using the HPLC technique with an ion-exchange column /ION-210 for cation exchange, ION-110 for anion exchange and C18 loaded with cation-exchange sites/. Optimal results are obtained with the ION-110 column.208Tl and212Pb are eluted by 0.5M HCl in 2.5 and 5 min, respectively.212Bi is recovered by elution with 1M HNO3. 相似文献
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Darko N. Pantić Sandra Aranđelović Siniša Radulović Sanja Grgurić-Šipka 《Journal of Coordination Chemistry》2019,72(5-7):908-919
Three new ruthenium(II)-arene halido complexes, [(η6-p-cymene) RuX(L)] (1–3), were synthesized in a reaction of [(η6-p-cymene)RuX2]2 with 5-chloro-1H-benzimidazole-2-carboxylic acid (HL) in ethanol (X– = Cl– (1), Br– (2), I– (3)). The complexes were characterized by elemental analysis, mass spectrometry, IR, 1H and 13C NMR spectroscopy. The cytotoxic activity of the ligand precursor and its ruthenium complexes was tested by MTT assay in human cancer cell lines: lung adenocarcinoma (A549), myelogenous leukemia (K562) as well as in one normal human fetal lung fibroblast cell line (MRC-5). The results show that ruthenium(II)-arene complexes possess enhanced cytotoxicity when compared to HL in the range of concentrations up to 300 µM. In terms of halido ligand substitution, cytotoxic activity toward A549 and K562 cell lines in 1–3 serie significantly increased (e.g., IC50 values for K562: 1: 205.76 µM; 2: 174.77 µM; 3: 83.97 µM). All studied compounds were found to be ineffective toward MRC-5. Hydrolysis of 1–3 was followed by UV-vis spectroscopy at 25?°C, revealing ligand-substitution reactions at the Ru(II) center. Compounds 2 and 3 underwent rapid hydrolysis ranging from a few minutes for the aquation to ca. 20?min, confirming typical Ru-arene behavior in aqueous solutions. 相似文献
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We employ density functional theory with Hubbard U correction or hybrid functionals to study the series of magnetic 3d metal trifluorides MF3 (M = Ti-Ni). Experimental lattice parameters are reproduced with an error margin of 0.5%–4.3%. Cooperative Jahn–Teller distortions are reproduced for MnF3, but also found in TiF3 and CoF3 at smaller levels compared to MnF3. Trends in electronic structure with respect to positions of the d bands are linked to the magnetic properties where M = Ti-Cr are weak magnetic Mott–Hubbard insulators, M = Fe-Ni are strong magnetic charge-transfer insulators and MnF3 falls in between. Our work contributes to the characterization of the relatively unknown NiF3, since FeF3 and CoF3 have similar electronic and magnetic properties. However, NiF3 does not show a Jahn–Teller distortion as present in CoF3. © 2019 Wiley Periodicals, Inc. 相似文献