Log in

Relevant bibliographies by topics / Samarium compounds / Journal articles

To see the other types of publications on this topic, follow the link: Samarium compounds.

Journal articles on the topic 'Samarium compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Samarium compounds.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Rabe, Gerd W., Mei Zhang-Presse, Florian A. Riederer, James A. Golen, Christopher D. Incarvito, and Arnold L. Rheingold. "Terphenyl Cyclooctatetraenyl Compounds of Samarium." Inorganic Chemistry 42, no. 23 (November 2003): 7587–92. http://dx.doi.org/10.1021/ic0301775.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Beemelmanns, Christine, and Hans-Ulrich Reissig. "New samarium diiodide-induced cyclizations." Pure and Applied Chemistry 83, no. 3 (January 18, 2011): 507–18. http://dx.doi.org/10.1351/pac-con-10-09-06.

Full text

Abstract:

Samarium diiodide (SmI2) smoothly promotes the cyclizations of suitably substituted carbonyl compounds with styrene subunits leading to benzannulated cyclooctenes. The intramolecular samarium ketyl addition to arene or hetarene moieties enables a new, efficient, and highly stereoselective entry to dearomatized products such as hexahydronaphthalenes, steroid-like tetra- or pentacyclic compounds, or dihydroindole derivatives. The usefulness of the developed SmI2-induced cyclization method was demonstrated by the shortest formal total synthesis of the alkaloid strychnine.

APA, Harvard, Vancouver, ISO, and other styles

3

Bućko, Mirosław M., Joanna Polnar, Jerzy Lis, Janusz Przewoźnik, Karolina Gąska, and Czesław Kapusta. "Magnetic Properties of the Bi₇Fe₃Ti₃O₂₁ Aurivillius Phase Doped with Samarium." Advances in Science and Technology 77 (September 2012): 220–24. http://dx.doi.org/10.4028/www.scientific.net/ast.77.220.

Full text

Abstract:

Bismuth layer-structured compounds in the Bi-Ti-Fe-O system known as Aurivillius phases are single phase multiferroics. It was stated that substitution of some rare earth elements for bismuth ions in such structure can modified its magnetic properties. Powders of Bi7Fe3Ti3O21 and Bi6.3Sm0.7Fe3Ti3O21 were prepared by co-precipitation – calcination method and then were sintered to dense polycrystalline materials. Low field DC susceptibility was measured in the zero field cooled (ZFC) and field cooled (FC) modes at 10÷350 K. For selected temperatures magnetisation curves and hysteresis loops were also measured. The FC and ZFC curves of both samples diverge at temperatures below 250 K indicating a spin glass-like behaviour. The compound with samarium exhibits magnetic hysteresis already at room temperature with the coercive field increasing to 870 Oe at 10 K. The low temperature hysteresis loops of the samarium containing compound are shift with respect to zero field which can be attributed to a magneto-electrical coupling of the samarium sublattice "exchange biased" by the iron one, which orders anti-ferromagnetically at a higher temperature than the samarium sublattice.

APA, Harvard, Vancouver, ISO, and other styles

4

Wang, Yufang, Xuewei Cao, Hyon U. Han, and Guoxiang Lan. "Raman spectra of samarium–fullerene intercalation compounds." Journal of Physics and Chemistry of Solids 63, no. 11 (November 2002): 2053–56. http://dx.doi.org/10.1016/s0022-3697(02)00193-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Basu, Manas K., and Bimal K. Banik. "Samarium-mediated Barbier reaction of carbonyl compounds." Tetrahedron Letters 42, no. 2 (January 2001): 187–89. http://dx.doi.org/10.1016/s0040-4039(00)01961-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Yu, Qiao Hong, Zheng Fa Li, Yong Xiang Li, Ping Zhan Si, Jiang Ying Wang, Hong Liang Ge, and Jing Ji Zhang. "Crystal Structures of New Compounds Na_0.5Sm_4.5Ti₄O₁₅ and Na_0.5Eu_4.5Ti₄O₁₅." Advanced Materials Research 415-417 (December 2011): 468–71. http://dx.doi.org/10.4028/www.scientific.net/amr.415-417.468.

Full text

Abstract:

New compounds of sodium samarium titanate Na0.5Sm4.5Ti4O15and sodium europium titanate Na0.5Eu4.5Ti4O15were synthesized successfully by solid state reaction at 1300 oC and 1200 oC, respectively. The lattice parameters of Na0.5Sm4.5Ti4O15and Na0.5Eu4.5Ti4O15were determined at ordinary temperature by using X-ray powder diffraction method. Their Lattice types were determined, and their patterns were indexed. Polycrystalline X-ray diffraction data of sodium samarium titanate were listed. Differences of their crystal structures were analyzed and discussed.

APA, Harvard, Vancouver, ISO, and other styles

7

Kawamura, N., T. Taniguchi, S. Mizusaki, Y. Nagata, T. C. Ozawa, and H. Samata. "Functional intermetallic compounds in the samarium–iron system." Science and Technology of Advanced Materials 7, no. 1 (January 2006): 46–51. http://dx.doi.org/10.1016/j.stam.2005.11.004.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Arelli, Sridhar Goud, Anil Kumar, and S. J. Dhoble. "Characterization of luminescence of samarium with phosphate compounds." Materials Today: Proceedings 27 (2020): 649–51. http://dx.doi.org/10.1016/j.matpr.2020.01.470.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Alekseev, P. A., J. M. Mignot, P. Link, W. Hahn, A. Ochiai, V. Filippov, E. V. Nefeodova, and E. S. Clementyev. "Spin–orbit transitions in mixed-valence samarium compounds." Physica B: Condensed Matter 259-261 (January 1999): 351–52. http://dx.doi.org/10.1016/s0921-4526(98)00834-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Bowden, G. J., and V. H. McCann. "On the Knight shift in samarium intermetallic compounds." Journal of Physics F: Metal Physics 16, no. 11 (November 1986): 1855–72. http://dx.doi.org/10.1088/0305-4608/16/11/021.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Nomura, Ryoji, Tatsuya Matsuno, and Takeshi Endo. "Samarium Iodide-Catalyzed Pinacol Coupling of Carbonyl Compounds." Journal of the American Chemical Society 118, no. 46 (January 1996): 11666–67. http://dx.doi.org/10.1021/ja962331a.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Endoh, Daizo, Terutaka Goto, Akira Tamaki, Bo Liu, Mitsuo Kasaya, Tadao Fujimura, and Tadao Kasuya. "Elastic Properties in AuCu3-Type Samarium Intermetallic Compounds." Journal of the Physical Society of Japan 58, no. 3 (March 15, 1989): 940–48. http://dx.doi.org/10.1143/jpsj.58.940.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Xiao, Shuhuan, Chen Liu, Bin Song, Liang Wang, Yan Qi, and Yongjun Liu. "Samarium-based Grignard-type addition of organohalides to carbonyl compounds under catalysis of CuI." Chemical Communications 57, no. 50 (2021): 6169–72. http://dx.doi.org/10.1039/d1cc00965f.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Sono, Masakazu, Yukiko Nishibuchi, Norihito Yamaguchi, and Motoo Tori. "Cyclization into Hydrindanes Using Samarium Diiodide: Stereochemical Features Depending on the Protecting Group." Natural Product Communications 11, no. 8 (August 2016): 1934578X1601100. http://dx.doi.org/10.1177/1934578x1601100807.

Full text

Abstract:

Monocyclic compounds bearing ketone and enone moieties in the same molecule can be cyclized to bicyclic compounds initiated by samarium diiodide. The stereochemistry of the products depended on the reaction conditions and also the protecting group of the hydroxy group existed in the molecule. A cyclization mechanism is discussed.

APA, Harvard, Vancouver, ISO, and other styles

15

Calinescu, Mirela, Catalina Stoica, and Mihai Nita-Lazar. "Complex Compounds of Sm(III) with Chlorhexidine Synthesis, characterization, luminescent properties and antibacterial activity." Revista de Chimie 70, no. 1 (February 15, 2019): 6–12. http://dx.doi.org/10.37358/rc.19.1.6840.

Full text

Abstract:

Three new samarium(III) complex compounds with chlorhexidine as ligand and mixed ligands chlorhexidine/o-phenanthroline have been prepared and characterized by elemental and thermogravimetrical analyses, infrared, electronic and luminescence spectra. The complexes corresponded to the formulas: [Sm(CHX)(NO3)2]� NO3, [Sm(CHX)(o-phen)2]� (NO3)3 and [Sm2(CHX)(o-phen)2(NO3)4]�(NO3)2, where CHX was the chlorhexidine. Chlorhexidine acted as neutral tetradentate NNNN donor, coordinating through the four imine nitrogen atoms. The two mixed ligands complexes showed a strong luminescent emission in solid state, characteristic of samarium(III) ion. The metal complexes and the chlorhexidine diacetate were in vitro evaluated for their antimicrobial activity against two Gram negative bacteria. The results revealed that all compounds were very effective in reducing the bacterial growth rate, even at low concentration.

APA, Harvard, Vancouver, ISO, and other styles

16

Tori, Motoo, and Masakazu Sono. "Reductive Cyclization Reactions to Bicyclic Compounds Using Samarium Diiodide." HETEROCYCLES 89, no. 6 (2014): 1369. http://dx.doi.org/10.3987/rev-14-795.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Bied, C., J. Collin, and H. B. Kagan. "Synthesis and reactivity of benzylic and allylic samarium compounds." Tetrahedron 48, no. 19 (January 1992): 3877–90. http://dx.doi.org/10.1016/s0040-4020(01)88468-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Banik, Bimal K., Indrani Banik, Susanta Samajdar, and Rogelio Cuellar. "Samarium/N-bromosuccinimide-induced reductive dimerization of carbonyl compounds." Tetrahedron Letters 46, no. 13 (March 2005): 2319–22. http://dx.doi.org/10.1016/j.tetlet.2005.01.170.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Basu, Manas K., and Bimal K. Banik. "ChemInform Abstract: Samarium-Mediated Barbier Reaction of Carbonyl Compounds." ChemInform 32, no. 16 (April 17, 2001): no. http://dx.doi.org/10.1002/chin.200116050.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

KAGAN, H. B. "ChemInform Abstract: Divalent Samarium Compounds: Perspectives for Organic Chemistry." ChemInform 22, no. 8 (August 23, 2010): no. http://dx.doi.org/10.1002/chin.199108370.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Filho, Manoel A. M., José Diogo L. Dutra, Gerd B. Rocha, Alfredo M. Simas, and Ricardo O. Freire. "RM1 modeling of neodymium, promethium, and samarium coordination compounds." RSC Advances 5, no. 16 (2015): 12403–8. http://dx.doi.org/10.1039/c4ra12682c.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Collin, Jacqueline, Jean Louis Namy, Frederic Dallemer, and Henri B. Kagan. "Synthesis of .alpha.-ketols mediated by divalent samarium compounds." Journal of Organic Chemistry 56, no. 9 (April 1991): 3118–22. http://dx.doi.org/10.1021/jo00009a035.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Linsinger, Stefan, and Rainer Pöttgen. "Chains of Condensed RuSm6/2 Octahedra in Sm3RuMg7 – A Ternary Ordered Version of the Ti6Sn5 Type." Zeitschrift für Naturforschung B 66, no. 6 (June 1, 2011): 565–69. http://dx.doi.org/10.1515/znb-2011-0603.

Full text

Abstract:

The magnesium-rich intermetallic compound Sm3RuMg7 was synthesized by induction melting of the elements. Single crystals were grown by slow cooling of the polycrystalline sample. The structure was characterized by powder and single-crystal X-ray diffraction: ordered Ti6Sn5 type, P63/mmc, Z = 2, a = 1034.1(2), c = 611.3(1) pm, wR2 = 0.0216, 399 F2 values and 19 parameters. The ruthenium atoms have slightly distorted octahedral samarium coordination. These RuSm6/2 octahedra (Ru-Sm 279 pm) are condensed via common faces leading to chains in the c direction which are arranged in the form of a hexagonal rod packing. Between these rods the Mg2 atoms build chains of face-sharing trigonal prisms. Alternately these prisms are centered by Mg3 or capped by Mg1 atoms on the rectangular faces. Within the magnesium substructure the Mg-Mg distances range from 303 to 335 pm. The Mg3 site shows slight mixing with samarium, leading to the composition Sm3.16RuMg6.84 for the investigated crystal. The compounds RE3RuMg7 (RE = Gd, Tb) are isotypic.

APA, Harvard, Vancouver, ISO, and other styles

24

SINGH, N. K., PRITAM KUMAR, O. P. ROY, and R. N. P. CHOUDHARY. "STUDIES OF STRUCTURAL AND ELECTRICAL BEHAVIOR OF SAMARIUM BARIUM TUNGSTATE CERAMICS." Journal of Advanced Dielectrics 01, no. 04 (October 2011): 465–70. http://dx.doi.org/10.1142/s2010135x11000495.

Full text

Abstract:

Polycrystalline samples of samarium barium tungstate [ Sm2(Ba0.5W0.5)2O7 : (SBW)] pyrochlore structure type oxides have been prepared by a solid-state reaction technique. X-ray diffraction (XRD) patterns of this compound at room temperature suggest the formation of a single phase compound with orthorhombic structure. Studies of the dielectric constant and dielectric loss of compound as a function of frequency (4 kHz–1 MHz) at room temperature, and as a function of temperature (23–350°C) at 20 and 50 kHz frequencies suggest that the compound does not have dielectric anomaly. The variation of dc resistivity suggests the semiconductor characteristics of the material. The value of activation energy (E a ~ 0.43 at 20 kHz and E a ~ 0.29 at 50 kHz) of the above mentioned compound has been calculated from the slope of the ln σac versus 1/T graph in the high temperature region (> 240°C). The low value of activation energy supports the superionic nature of the compounds in the high temperature region.

APA, Harvard, Vancouver, ISO, and other styles

25

Son, Hyeon Taek, Jae Seol Lee, Young Kyun Kim, Ik Hyun Oh, Kyosuke Yoshimi, and Kouichi Maruyama. "Effects of Samarium on Microstructure and Mechanical Properties of Mg-Al-Ca Alloys." Materials Science Forum 544-545 (May 2007): 295–98. http://dx.doi.org/10.4028/www.scientific.net/msf.544-545.295.

Full text

Abstract:

As samarium addition was increased, α- Mg matrix morphology was changed from dendritic to equiaxed grains and average value of grain size was decreased from 101.6㎛ to 39.3㎛. Samarium addition to Mg-5Al-3Ca based alloys resulted in the formation of Mg-Al-Sm thernary intermetallic compounds at grain boundarys and α-Mg matrix grains. In these alloys, two kinds of eutectic structure were observed; coarse irregular-shape structure at grain boundary and fine needle-shape structure in the α-Mg matrix grain. It is found that the yield strength and ultimate strength showed the maximum value of 109.1MPa and 139.3 at Mg-5Al-3Ca-2Sm alloy, respectively.

APA, Harvard, Vancouver, ISO, and other styles

26

Utimoto, Kiitiro, and Seijiro Matsubara. "Samarium Diiodide-Mediated Reaction of Organic Halides with Carbonyl Compounds." Journal of Synthetic Organic Chemistry, Japan 56, no. 11 (1998): 908–18. http://dx.doi.org/10.5059/yukigoseikyokaishi.56.908.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Nishiyama, Yutaka, Satoshi Sakaguchi, and Yasutaka Ishii. "Development of New Synthetic Reactions Using Samarium Compounds as Catalysts." Journal of Synthetic Organic Chemistry, Japan 58, no. 2 (2000): 129–37. http://dx.doi.org/10.5059/yukigoseikyokaishi.58.129.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

NOMURA, R., T. MATSUNO, and T. ENDO. "ChemInform Abstract: Samarium Iodide-Catalyzed Pinacol Coupling of Carbonyl Compounds." ChemInform 28, no. 11 (August 4, 2010): no. http://dx.doi.org/10.1002/chin.199711033.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Singh, M., A. Gour, and S. Singh. "High Pressure Phase Transition and Allied Behavior οf Samarium Compounds." Acta Physica Polonica A 123, no. 4 (April 2013): 709–13. http://dx.doi.org/10.12693/aphyspola.123.709.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Sadyrbekov, D. T., M. R. Bissengaliyeva, D. B. Gogol, N. S. Bekturganov, and S. T. Taimassova. "Heat Capacity and Thermodynamic Functions of Sr(La1-xLnx)2WO7 Compounds Doped with Samarium and Europium." Eurasian Chemico-Technological Journal 23, no. 1 (March 25, 2021): 29. http://dx.doi.org/10.18321/ectj1031.

Full text

Abstract:

Samples based on strontium, lanthanum and tungsten with the general formula of Sr(La1-xLnx)2WO7 doped with samarium and europium at 1 and 3 at.% were synthesized by the solid-phase method at temperatures up to 1200 °C. The crystal structure of the samples was confirmed by X-ray powder diffraction. A full-profile refinement of the structure of compounds related to monoclinic syngony with the space group P1121/b was performed. The admixture phase is a compound of the Sr3Ln2W2O12 type with a trigonal system and space group R3-C. Based on the results of structure refinement, the ratio of the main compound and the admixture phase in the samples was determined to introduce corrections during measurements. Using adiabatic calorimetry we measured the heat capacity of the samples and found the thermodynamic functions of main compounds over the range of 5‒320 K. Anomalies were detected in the heat capacity of the samples below 15 K, and we calculated the excess and lattice heat capacity for these anomalies by means of linearization methods.

APA, Harvard, Vancouver, ISO, and other styles

31

Ma, Yongmin, and Yongmin Zhang. "A Novel Tandem Reaction of Chalcone with Malononitrile or Ethylcyanoacetate Promoted by Samarium (III) Iodide and Followed by Samarium (II) Iodide." Journal of Chemical Research 2002, no. 6 (June 2002): 288–90. http://dx.doi.org/10.3184/030823402103172013.

Full text

Abstract:

Michael additions of active methylene compounds (for example: malononitrile, ethylcyanoacetate) to chalcones promoted by SmI3 gave 1,4-adducts which, after intramolecular coupling reactions induced by SmI2, furnished fine yields of cyclic products.

APA, Harvard, Vancouver, ISO, and other styles

32

Chen, Jue, and Yongmin Zhang. "Samarium (III) triiodide catalysed reaction of salicylaldehydes with active methylene compounds." Journal of Chemical Research 2001, no. 9 (September 1, 2001): 394–95. http://dx.doi.org/10.3184/030823401103170205.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Freedman, Deborah, Anna Kornienko, Thomas J. Emge, and John G. Brennan. "Divalent Samarium Compounds with Heavier Chalcogenolate (EPh; E = Se, Te) Ligands." Inorganic Chemistry 39, no. 10 (May 2000): 2168–71. http://dx.doi.org/10.1021/ic9913278.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Maruyama, F., H. Nagai, Y. Amako, H. Yoshie, and K. Adachi. "NMR study of 2–17 cobalt-based intermetallic compounds with samarium." Journal of Magnetism and Magnetic Materials 177-181 (January 1998): 1128–30. http://dx.doi.org/10.1016/s0304-8853(97)01000-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Legrand, B. A., D. Chateigner, R. Perrier de la Bathie, and R. Tournier. "Orientation of samarium–cobalt compounds by solidification in a magnetic field." Journal of Alloys and Compounds 275-277 (July 1998): 660–64. http://dx.doi.org/10.1016/s0925-8388(98)00414-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

BIED, C., J. COLLIN, and H. B. KAGAN. "ChemInform Abstract: Synthesis and Reactivity of Benzylic and Allylic Samarium Compounds." ChemInform 23, no. 37 (August 21, 2010): no. http://dx.doi.org/10.1002/chin.199237109.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Zheng, Xing-Liaiig, and Yong-Min Zhang. "Samarium-promoted Chemoselective Reduction of Aromatic Nitro Compounds in Ionic Liquid." Chinese Journal of Chemistry 20, no. 9 (August 26, 2010): 925–28. http://dx.doi.org/10.1002/cjoc.20020200925.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Tori, Motoo, and Masakazu Sono. "ChemInform Abstract: Reductive Cyclization Reactions to Bicyclic Compounds Using Samarium Diiodide." ChemInform 45, no. 30 (July 10, 2014): no. http://dx.doi.org/10.1002/chin.201430237.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

COLLIN, J., J. L. NAMY, F. DALLEMER, and H. B. KAGAN. "ChemInform Abstract: Synthesis of α-Ketols Mediated by Divalent Samarium Compounds." ChemInform 22, no. 43 (August 22, 2010): no. http://dx.doi.org/10.1002/chin.199143112.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Zhou, Longhu, and Yongmin Zhang. "Samarium(II) iodide induced reductive coupling of nitriles with nitro compounds." Journal of the Chemical Society, Perkin Transactions 1, no. 17 (1998): 2899–902. http://dx.doi.org/10.1039/a803077d.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Kamochi, Yasuko, Tadahiro Kudo, Toshinobu Masuda, and Akira Takadate. "Facile Deoxygenation of Dicarbonyl Compounds Using a Samarium Diiodide–Additive System." CHEMICAL & PHARMACEUTICAL BULLETIN 53, no. 8 (2005): 1017–20. http://dx.doi.org/10.1248/cpb.53.1017.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Yu, Mingxin, and Yongmin Zhang. "REDUCTIVE COUPLING OF CARBONYL COMPOUNDS TO PINACOLS WITH SAMARIUM/TMSCI SYSTEM." Organic Preparations and Procedures International 33, no. 2 (April 2001): 187–90. http://dx.doi.org/10.1080/00304940109356587.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Wei, Bo, Zhan Yong Yang, Duo Xu, Chang Yu Sun, Jun Wei Yuan, Fan Sun, Xiao Qing Gu, Qiao Yun Li, and Gao Wen Yang. "Four new samarium(III) compounds based on different tetrazole–carboxylate ligands." Journal of the Iranian Chemical Society 15, no. 2 (November 20, 2017): 399–406. http://dx.doi.org/10.1007/s13738-017-1240-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Liu, Jichao, Yaoyao Xie, Caiyan Wu, Yinlin Shao, Fangjun Zhang, Yinyin Shi, Qianrui Liu, and Jiuxi Chen. "Samarium(iii) catalyzed synthesis of alkenylboron compounds via hydroboration of alkynes." Organic Chemistry Frontiers 8, no. 14 (2021): 3802–8. http://dx.doi.org/10.1039/d1qo00513h.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Andreev, O. V., V. V. Ivanov, A. V. Gorshkov, P. V. Miodushevskiy, and P. O. Andreev. "Chemistry and Technology of Samarium Monosulfide." Eurasian Chemico-Technological Journal 18, no. 1 (June 17, 2016): 55. http://dx.doi.org/10.18321/ectj396.

Full text

Abstract:

<p class="Pa10">Samarium monosulfide SmS (Fm3m, а = 5.967 Å, ΔЕ = 0.23 V, n = 10<sup>20</sup> cm<sup>–1</sup>, <em>σ</em><em> </em>= 500 Ω<sup>–1</sup> cm<sup>–1</sup>, <em>α</em><em> </em>= 350 μВ/K) is a thermoelectric material (Z>1) and, at the same time, a pressure-sensitive material (K≥40–50). Samarium monosulfide is a daltonide phase with a solid solution whose extent is mostly in the range of cationic vacancies: Sm<sub>1+x </sub>S<sub>1-x</sub>□<sub>2x</sub> (<em>x </em>= 0–0.035; 1750 K). The congruent melting temperature of SmS is 2475 K. In the Sm–S system, Sm<sub>3</sub>S<sub>4</sub> crystallizes from melt without change in composition. Samarium monosulfide thermally dissociates to Sm<sub>3</sub>S<sub>4</sub> and Sm. Large-scale SmS lots are produced from samarium and sulfur. Synthesis is carried out in sealed-off silica glass ampoules at 500–1350 K followed by heat treatment in tantalum crucibles at 1500–2400 K. The reaction of metal samarium with sulfur results in the formation of sulfide phases that coat the samarium surface in the following order: SmS, Sm<sub>3</sub>S<sub>4</sub>, Sm<sub>2</sub>S<sub>3</sub>, and SmS<sub>2</sub>. Subsequent annealing at 1500–1800 K provides SmS yields up to 96–97 mol %. Equilibrium minor phases for SmS are Sm<sub>3</sub>S<sub>4</sub>, Sm<sub>2</sub>О<sub>2</sub>S, and Sm. X-ray amorphous SmS was prepared by reacting organic samarium compounds with sulfur or H2S. The samarium (+2) oxidation state determines the chemical specifics of SmS. 90–120 μm SmS powders are thermally hydrolyzed starting at 600 K with Н<sub>2</sub> evolution and oxidize starting at 520 K to yield Sm<sub>3</sub>S<sub>4</sub> and then Sm<sub>2</sub>О<sub>2</sub>S phases. A 90–120 μm SmS fraction for film deposition by flash evaporation is prepared by milling annealed SmS samples. Tablets 75 mm in diameter for use in magnetron sputtering are pressed from a <60-μm fraction.</p>

APA, Harvard, Vancouver, ISO, and other styles

46

Arizmendi-Morquecho, Ana, Alejandra Chávez-Valdez, Josué Aguilar, and Jaime Álvarez. "Fly Ash/Rare Earth Oxide Coatings by EPD: Processing and Characterization." Key Engineering Materials 507 (March 2012): 197–202. http://dx.doi.org/10.4028/www.scientific.net/kem.507.197.

Full text

Abstract:

Novel materials that can be used as thermal barrier coatings in high temperature applications were obtained by homogenization, mechanical milling and thermal treatment. Samarium oxide was investigated as an alternative to react with the free silica from fly ash and to form new silicate compounds. The main phases found in fly ash-Sm2O3 mixtures were mullite and samarium silicate Sm4.66O(SiO4)3. Electrophoretically deposited coatings from these materials were obtained at 50 V and 3 minutes deposition time. The surface microstructure of the coatings was characterized by scanning electron microscopy (SEM-EDXS). The coatings were homogeneous and showed no crack formation. Additionally, thermal conductivity of the bulk samples at room temperature was determined. The thermal conductivity values of the new materials were below 1 W/mK which makes them suitable for thermal and environmental barrier applications.

APA, Harvard, Vancouver, ISO, and other styles

47

Nishitani, Takayuki, Hiroyuki Shiraishi, Satoshi Sakaguchi, and Yasutaka Ishii. "Synthesis of 1,3-oxazolidines from imines and epoxides catalyzed by samarium compounds." Tetrahedron Letters 41, no. 18 (April 2000): 3389–93. http://dx.doi.org/10.1016/s0040-4039(00)00374-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Powell, Jonathan R., Sally Dixon, Mark E. Light, and Jeremy D. Kilburn. "Samarium diiodide-mediated intramolecular cyclodimerisation of bis-α,β-unsaturated carbonyl compounds." Tetrahedron Letters 50, no. 26 (July 2009): 3564–67. http://dx.doi.org/10.1016/j.tetlet.2009.03.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Hou, Zhaomin, Yuzo Fujiwara, and Hiroshi Taniguchi. "Lanthanides in organic synthesis. Samarium metal promoted selective formation of azoxy compounds." Journal of Organic Chemistry 53, no. 13 (June 1988): 3118–20. http://dx.doi.org/10.1021/jo00248a041.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Fuchikami, N., and S. Ishioka. "An odd-parity localised model for the valence mixing of samarium compounds." Journal of Physics C: Solid State Physics 18, no. 2 (January 20, 1985): 319–43. http://dx.doi.org/10.1088/0022-3719/18/2/011.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!