Fluorine insertion in inorganic materials

Current Opinion in Solid State and Materials Science

Volumn 3, Issue 2, 1998, Pages 132-136

  Greaves, Colin ^a   Francesconi, M Grazia ^a  

^a UNIVERSITY OF BIRMINGHAM   (United Kingdom)

Author keywords

T Tetragonal structure of K2NiF4 (and substituted La2CuO4); T Tetragonal structure of Nd2CuO4 Tc Superconducting transition temperature

Indexed keywords

EID: 0013533814     PISSN: 13590286     EISSN: None     Source Type: Journal    
DOI: 10.1016/S1359-0286(98)80077-6     Document Type: Article

References (34)

1. c = 111K) prepared at high pressure. Physica C. 257:1996;313-320.
2. 1+δ (0 ≤ x ≤ 1) superconducting system. J Appl Phys. 81:1997;1628-1632.
3. 4 structures. J Mater Chem. 6:1996;1219-1224.
4. 2+δ. Nature. 369:1994;382-384.
5. 4F as a fluorinating reagent. Physica C. 241:1995;151-157.
6. 2+δ (A = Ca, Ba) using transition-metal difluorides as fluorinating agents. Physica C. 253:1995;16-22.
7. 2+δ (A = Ca, Ba) - synthetic pathways and associated structural rearrangements. J Solid State Chem. 1998;. in press.
8. 6-y (Ln = La, Nd: A = Ca, Sr). J Mater Chem. 7:997;2077-2083.
9. 2+δ. Physica C. 253:1995;259-265.
10. 4 octahedron, and the expected Jahn - Teller distortion at this Cu site explains the significant expansion (10%) of the unit cell along c.
11. 4. Physica C. 167:1990;97-101.
12. 4 thin films by post-deposition fluorination. Physica C. 270:1996;305-310.
13. 4. Nature. 338:1989;240-241.
14. y. Phys Rev B. 53:1996;2265-2268.
15. x. Physica C. 272:1996;220-226.
16. 2 sheets and apical anions. Phys Rev B. 52:1995;16233-16236.
17. c = 44 K. Physica C. 270:1996;35-40.
18. 4-y (x = 0.0, 0.4, 1.0). J Phys Condens Matter. 9:1997;1249-1259.
19. Kurmaev EZ, Elokhina LV, Fedorenko VV, Bartkowski S, Neumann M, Greaves C, Edwards PP, Slater PR, Francesconi MG. X-ray-emission and photoelectron-spectra, and the location of fluorine-atoms in strontium and calcium copper oxyfluorides. J Phys Condens Matter. 8:1996;4847-4854.
20. 2+δ (M = Ca, Sr). J Chem Soc Chem Commun. 24:1996;2703-2704 See annotation [21].
21. 2+δ is well reproduced by atomistic calculations. The F position, and the distortion from the ideal structure are both predicted. Energetics of a range of alkaline and alkaline-earth dopants at the Sr site were also calculated.
22. 2+δ. J Mater Chem. 5:1995;913-916.
23. 2+δ. Physica C. 245:1995;270-272.
24. 3 and high temperature superconducting oxides. Physica C. 272:1996;187-196.
25. y thin films. Physica C. 280:1997;115-120.
26. 2 layers. These layers should be amenable to reduction to form n-type superconductors.
27. Selig H, Lifshitz C, Peres T, Fischer JE, McGhie AR, Romanow WJ, McCauley JP, Smith AB. Fluorinated fullerenes. J Am Chem Soc. 113:1991;5475-5476.
28. Tuinman AA, Gakh AA, Adcock JL, Compton RN. Hyperfluorination of Buckminsterfullerene - cracking the sphere. J Am Chem Soc. 115:1993;5885-5886.
29. Taylor R, Langley GJ, Holloway JH, Hope EG, Brisdon AK, Kroto HW, Walton DRM. Oxygenated species in the products of fluorination of [60]- and [70]-fullerene by fluorine gas. J Chem Soc Perkin Trans. 2:1995;181-187.
30. 60, and the mode of fragmentation of the fluorinated cage under electron-impact ionization conditions. J Chem Soc Chem Commun. 1993;875-878.
31. Fowler PW, Sandall JPB, Taylor R. Structural parallels in hydrogenated and fluorinated [60]- and [70]-fullerenes. J Chem Soc Perkin Trans. 2:1997;419-423.
32. Boltalina OV, Abdul-Sada AK, Taylor R. Hyperfluorination of [60]- fullerene by krypton difluoride. J Chem Soc Perkin Trans. 2:1995;981-985.
33. 60. J Fluorine Chem. 78:1996;7-13.
34. 46 has been examined using single crystal XRD. The C atoms were modelled by two separate spheres of radii 3.13 Å (C in the form of CC bonds) and 3.83 Å (C bonded to F), and the F atoms by a sphere of radius 5.12 Å. Molecular orbital calculations based on the model suggest that residual π-electron density is concentrated within the cage and may account for the reluctance to form additional C-F bonds.