958 resultados para Cr^4
Resumo:
NdYAG808nmNdYAGQ90Cr^4YAGQ119mW465mW1064nm16ns1818kHz34J61mWQ
Resumo:
LDNdYLFCr^4YAGQ1053nm05mm90Cr^4 YAG17W606ns15W95kHz1579mJ055mm95Cr^4 YAG17W686ns135W14kHz
Resumo:
(Cr^4+Nd^3+GGG)QCrCr^4+GGGNd^3+GGG(Cr^4+Nd^3+)GGG(Cr^4+Nd^3+)GGGNd^3+GGG33s250s(Cr^4+Nd^3+)GGGQ
Resumo:
(Cr^4+Nd^3+:GGG)CrNdJuddofeltt(t=246)McCumber^4F3/2^4I11/2Cr^3+300900nmCr^3+Nd^3+Cr^4+106m
Resumo:
CrAl2O3Al2O3Cr^3Mg^2Cr^4Cr^41223nmCr^437nm
Resumo:
X,(SESAM),KerrCr4+YAG.80 fs,120 MHz,100 W.
Resumo:
YbYAGYb^3YbYbYAGXYb^3CrYbYAGCr^4
Resumo:
Edge-sharing bioctahedral (ESBO) complexes [Ru-2(OMe)(O2CC6H4-p-X)3(1-MeIm)(4)](ClO4)2 (X = OMe (1a), Me (1b)) and [Ru-2(O2CC6H4-P-X)(4)(1-MeIm)(4)](ClO4)(2) (X = OMe (2a), Me (2b)) are prepared by reacting Ru2Cl(O(2)CR)(4) with 1-methylimidazole (1-MeIm) in methanol followed by treatment with NaClO4. Complex 2a and the PF6- salt (1a') of 1a have been structurally characterized. Crystal data for 1a.1.5MeCN. 0.5Et(2)O: triclinic, P (1) over bar, a = 13.125(2) Angstrom, b = 15.529(3) Angstrom, c 17.314(5) Angstrom, a; 67.03(2)degrees, beta 68.05(2)degrees, gamma = 81.38(1)degrees, V 3014(1) Angstrom(3), Z = 2. Crystal data for 2a: triclinic, P (1) over bar, a 8.950(1) Angstrom, b = 12.089(3) Angstrom, c = 13.735(3) Angstrom, alpha 81.09(2)degrees, beta = 72.27(1)degrees, gamma = 83.15(2)degrees, V = 1394(1) Angstrom(3), Z = 1. The complexes consist of a diruthenium(III) unit held by two monoatomic and two three-atom bridging ligands. The 1-MeIm ligands are at the terminal sites of the [Ru-2(mu-L)(eta(1):mu-O(2)CR)(eta(1):eta(1):mu-O(2)CR)(2)](2+) core having a Ru-Ru single bond (L = OMe or eta(1)-O(2)CR). The Ru-Ru distance and the Ru-O-Ru angle in the core of 1a' and 2a are 2.49 Angstrom and similar to 76 degrees. The complexes undergo one-electron oxidation and reduction processes in MeCN-0.1 M TBAP to form mixed-valence diruthenium species with Ru-Ru bonds of orders 1.5 and 0.5, respectively.
Resumo:
Organic thin-film transistors (OTFTs) using high dielectric constant material tantalum pentoxide (Ta2O5) and benzocyclobutenone (BCBO) derivatives as double-layer insulator were fabricated. Three metals with different work function, including Al (4.3 eV), Cr (4.5 eV) and Au (5.1 eV), were employed as gate electrodes to study the correlation between work function of gate metals and hysteresis characteristics of OTFTs. The devices with low work function metal Al or Cr as gate electrode exhibited high hysteresis (about 2.5 V threshold voltage shift). However, low hysteresis (about 0.7 V threshold voltage shift) OTFTs were attained based on high work function metal Au as gate electrode.
Resumo:
88000 t80% 1. 18.2%6.9-32.1%3.7-9.6 t9.8%6.6-14.5%1.3-2.7 t 2. 7-40000 ng•m-315000 ng•m-3120 ng•m-324 ng•m-343-2100 ng•L-10.30-1.1 ng•L-192-2300 ng•L-12.6-7.9 ng•L-11.3-360 mg•kg-10.18-47.5 mg•kg-1pH 3. 1060 g•g-1 Cr347 g•g-1 Cr917 g•g-1 Cr-50 g•g-1 Cr40.0 g•g-1 Cr66.2 g•g-1 Cr56.9 g•g-1 Cr1.30 g•g-1 Cr2.5 g•g-1 Cr 4. 37.31.92.3 g•g-12.81.31.5 g•g-1358.521.333.1 ng•g-114.65.74.0 ng•g-1397.5%94.1%93.5% (r=0.65, p<0.01) 5. 5.05 g•g-12.35-10.6 g•g-15.63 g•g-12.54-9.55 g•g-13.53 g•g-11.87-5.65 g•g-14.01 g•g-12.29-9.23 g•g-132.81.31.5 g•g-10.47-5.69 g•g-10.65 g•g-10.26¬-1.38 g•g-12003-0.23 g•d-1•kg-10.1 g•d-1•kg-1 (USEPA, 1997)
Resumo:
Fundao de Amparo Pesquisa do Estado de So Paulo (FAPESP)
Resumo:
The Generator Coordinate Hartree-Fock (GCHF) method is employed to design 16s, 16s10p, 24s17p13d, 25s17p13d, and 26s17p Gaussian basis sets for the H ((2)S), O ((3)P), O(2-) ((1)S), Cr(3+) ((4)F), Cr(4+) ((3)F), and Cr(6+) ((1)S) atomic species. These basis sets are then contracted to (4s) for H ((2)S), (6s4p) for O ((3)P), and O(2-) ((1)S), (986p3d) for Cr(3+) ((4)F), (10s8p3d) for Cr(4+) ((3)F), and (13s7p) for Cr(6+) (1S) by a standard procedure. For evaluation of the quality of those basis sets in molecular calculations, we have accomplished studies of total and orbital (HOMO and HOMO-1) energies at the HF-Roothaan level for the molecular species of our interest. The results obtained with the contracted basis sets are compared to the values obtained with our extended basis sets and to the standard 6-311G basis set from literature. Finally, the contracted basis sets are enriched with polarization function and then utilized in the theoretical interpretation of IR-spectrum of hexaaquachromium (III) ion, [Cr(H(2)O)(6)](3+), tetraoxochromium (IV) ion, [CrO(4)](4-), and tetraoxochromium (VI) ion, [CrO(4)](2-). The respective theoretical harmonic frequencies and IR-intensities were computed at the density functional theory (DFT) level. In the DFT calculations we employed the Becke's 1988 functional using the LYP correlation functional. The comparison between the results obtained and the corresponding experimental values indicates a very good description of the IR-spectra of the molecular ions studied, and that the GCHF method is still a legitimate alternative for selection of Gaussian basis sets. (C) 2003 Elsevier B.V. All rights reserved.
