排序方式: 共有46条查询结果,搜索用时 15 毫秒
21.
22.
23.
M.?V.?Arsen’ev L.?S.?Okhlopkova A.?I.?Poddel’skiiEmail author G.?K.?Fukin 《Russian Journal of Coordination Chemistry》2018,44(2):162-168
The oxidative addition of bis-o-benzoquinone Q–(CH=N–N=CH)–Q (L), in which two 3,5-ditert-butyl-o-benzoquinones are linked to each other in positions 6 via the CH=N–N=CH group, to triphenylstibine gave a new binuclear triphenylantimony(V) bis-catecholate complex, Ph3Sb(Cat–(CH=N–N=CH)–Cat)SbPh3 (I). Recrystallization of I from a methanol–trichloromethane mixture resulted in an additional coordination of a methanol molecule to each antimony atom to give the binuclear complex, (CH3OH)Ph3Sb(Cat–(CH=N–N=CH)–Cat)SbPh3(CH3OH) (I · 2CH3OH), the crystals of which (I · 2CH3OH) · 2CH3OH · CHCl3 (II) contain additionally two methanol solvate molecules, which fix the geometry of the nitrogen-containing bridging group, and a trichloromethane molecule. The molecular structure of compound II in the crystalline state was determined by X-ray diffraction (CIF file CCDC no. 1560840). 相似文献
24.
N. A. Len’shina M. Yu. Zakharina R. S. Kovylin M. A. Baten’kin T. I. Kulikova M. V. Arsen’ev S. A. Chesnokov 《High Energy Chemistry》2018,52(5):378-383
The effective rate constants for the photoreduction (kH) of 9,10-phenanthrenequinone (PQ) in the presence of dimethacrylate monomers (ethylene glycol dimethacrylate (DMEG), triethylene glycol dimethacrylate (TGM-3), and oligocarbonate dimethacrylate (OKM-2)) and porous polymers based on them have been spectrophotometrically determined. The values of kH in the presence of DMEG and TGM-3 in benzene solutions and in the monomer media are two times greater than in the presence of OKM-2. The values of kH for PQ in pores of polyDMEG, polyTGM-3, and polyOKM-2 are approximately identical and do not depend on the pore size (up to hundreds of nanometers) and the specific surface area. 相似文献
25.
The theory of squall storms is developed. The results are compared with observations. 相似文献
26.
27.
Piskunov A. V. Pashanova K. I. Mart’yanov K. A. Arsen’eva K. V. Cherkasov A. V. 《Russian Journal of Coordination Chemistry》2020,46(12):795-804
Russian Journal of Coordination Chemistry - Two synthetic approaches were developed for the preparation of 3,6-di-tert-butyl-2-hydroxy-4-pyridinylphenolate (LH), a new zwitter-ionic redox-active... 相似文献
28.
Harutyun Melikyan Arsen Babajanyan Jongchel Kim Barry Friedman 《Journal of magnetism and magnetic materials》2009,321(16):2483-2487
A near-field scanning microwave microscope (NSMM) incorporating an atomic force microscope (AFM) probe tip was used for the direct imaging of magnetic domains of a hard disk under an external magnetic field. We directly imaged the magnetic domain changes by measuring the change of reflection coefficient S11 of the NSMM at an operating frequency near 4.4 GHz. Comparison was made to the magnetic force microscope (MFM) image. Using the AFM probe tip coupled to the tuning fork distance control system enabled nano-spatial resolution. The NSMM incorporating an AFM tip offers a reliable means for quantitative measurement of magnetic domains with nano-scale resolution and high sensitivity. 相似文献
29.
N. Yu. Shushunova B. B. Troitskii S. A. Chesnokov T. A. Kovylina M. V. Arsen’ev A. N. Konev M. Yu. Zakharina I. L. Fedyushkin 《Russian Journal of Applied Chemistry》2015,88(10):1667-1672
A series of narrow-MMD polymers with the molecular mass from 33 × 103 to 123 × 103 (polydispersity coefficient 1.08–1.16) were synthesized by bulk polymerization of n-butyl acrylate [2,2′-azobis(isobutyronitrile), 60°C] in the presence of a low-molecular-mass RAFT agent, dibenzyl trithiocarbonate. Then, polymerization of acrylic acid was performed in aqueous-alcoholic solution (ammonium persulfate, 70°C) in the presence of the obtained polymers, and a series of n-butyl acrylate–acrylic acid block copolymers with the molecular masses from 22 × 103 to 81 × 103 (polydispersity coefficient 1.07–1.13) were prepared. In aqueous-alcoholic solutions of the synthesized copolymers, there are nanoparticles whose size varies from 5 tо 65 nm and increases with an increase in the molecular mass of the copolymer and in the concentration of water in the solvent. 相似文献
30.
A nonlinear theory of storm surges was constructed. The results are compared with observation data. 相似文献