12038-21-0Relevant articles and documents
Chowdhury, A. J. S.,Cheetham, A. K.,Cairnst, J. A.
, p. 353 - 360 (1985)
Synthesis of poorly crystallized platinum metal dichalcogenides
Passaretti,Kaner,Kershaw,Wold
, p. 501 - 503 (1981)
Poorly crystallized RuS2, OsS2, PtS2, and PdS2 were prepared by the reaction of the anhydrous hexachlorometallate(IV) with hydrogen sulfide at various temperatures. Magnetic susceptibility measurements were obtained for the poorly crystallized materials as well as their annealed crystalline analogues. The magnetic susceptibility data indicate that the dichalcogenides are diamagnetic in both the poorly crystallized and crystalline phases. Powder X-ray diffraction analysis of the annealed materials indicates that RuS2 and OsS2 crystallize with the pyrite structure (a = 5.610 and a = 5.620 ?, respectively). PdS2 crystallizes with an orthorhombic, distorted-pyrite structure (a = 5.457, b = 5.532, c = 7.524 ?). PtS2 crystallizes in the hexagonal CdI2 structure (a = 3.544, c = 5.029 ?).
Spectroscopy of Eu3+-doped PtS2 nanoclusters
Parsapour,Kelley,Williams
, p. 7971 - 7977 (1998)
The synthesis and characterization of PtS2 nanoclusters synthesized in AOT/hexanol/heptane inverse micelles are reported. Electron diffraction and optical spectroscopy have been used to characterize these nanoclusters. The electron diffraction results show that the nanoclusters have the same crystal structure as bulk PtS2 and are consistent with the nanoclusters being a single S-Pt-S trilayer. Absorption spectroscopy shows that these nanoclusters have an indirect band gap of 1.58 eV as compared to 0.87 eV for bulk PtS2. The nanoclusters can be grown such that their mass is doubled, resulting in a band gap of 1.27 eV. PtS2 nanoclusters doped with 1-5% Eu3+ were also synthesized in AOT/hexanol/heptane and tridodecylmethylammonium chloride (TDAC/hexanol/octane inverse micelles. The mj structure and relative intensities of Europium emission lines are indicative of the symmetry of the local environment and hence the location of the Eu3+ ion. It is concluded that synthesis of doped nanoclusters in TDAC/hexanol/octane results in Eu3+ ions that are situated in the near-octahedral holes of the PtS2 lattice, while an AOT/hexanol/heptane synthesis results in a Eu3+ ion on the nanocluster edges. The emission and fluorescence excitation spectra show that 4.0 eV optical excitation of the nanocluster results in energy transfer and subsequent luminescence of the europium dopant. Since the europium excited state is at a higher energy than the band gap, it is concluded that energy transfer to the dopant competes with energy relaxation of the electron/hole pair. Passivation of the nanocluster surface trap states is observed to increase the intensity of europium luminescence, and we conclude that trapping also competes with electron/hole energy relaxation.
Thermal Decomposition of Gold, Copper, Palladium and Platinum Complexes Prepared from the M(0) - DMSO-RX System
Kokoreva, S. G.,Nifontova, G. A.,Korableva, L. G.,Sikorenko, Yu. B.,Lavrent'ev, I. P.
, p. 1270 - 1274 (2008/10/08)
Thermal decomposition of gold, copper, palladium, and platinum complexesprepared by oxidation of the corresponding metal in the DMSO-RX systems , where R is H or alkyl, X is Cl or Br, is studied by derivatography. Neutral complexes [AuCl(Me2S)] (1) [AuBr(Me2S)] (2), [AuBr3(Me2S)] (3), [CuBr(Me2S)] (4), [PdBr2(Me2S)2] (5), and PtBr4(Me2S)2] (6) are investigated. The intermediate products of decomposition of palladium and and platinum complexes are studied by elemental analysis and IR spectroscopy. It is established that the final product of thermolysis of all of the studied gold complexes is metal. In the case of the copper complex, the final product is copper bromide, whereas, in the case of the palladium and platinum complexes, the final products are metal sulfides.
