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Variable-energy valence and inner-valence photoelectron spectra have been recorded for the CpNiNO complex (Cp = eta(5)-C(5)H(5)) between 21.2 and 100 eV, using He I radiation and synchrotron radiation. The ground state electronic structure has been calculated by using the Xalpha-SW method. Photoionization cross sections (sigma) have also been calculated for the valence ionizations using the Xalpha-SW method. The theoretical branching ratios (sigma(i)/ summation operatorsigma) have been compared with the observed branching ratios (A(i)()/ summation operatorA) between 21.2 and 100 eV. The assignment of the photoelectron spectrum based on the analysis of intensity variations and width of vibrational peaks is consistent with the ion state orbital ordering 5e(1)(1) < 7a(1)(2) < 3e(2)(3) < 4e(1)(4) (band numbers are in parentheses) and is inconsistent with another recently proposed ordering 5e(1)(1), 5e(1)(2) < 7a(1), 3e(2)(3) < 4e(1)(4), which takes the 5e(1) vibronic effects into consideration. The experimental branching ratio results indicate a Ni 3p resonance effect around 75 eV in the photoionization process. The inner-valence spectrum has also been assigned with the aid of the Xalpha-SW calculations. 相似文献
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Using the partial quadrupole splitting values (PQS) for ligands such as Cl−, CN− and NH3 derived from Mössbauer spectra of Fe(II) low spin compounds, the sign of Vzz is obtained for (e2qQ)Co in isoelectronic compounds of Co(III) low spin. The predicted signs of Vzz are: trans- [Co(NH3)4Cl2]+, positive; [Co(NH3)5Cl]++, positive, and [Co(NH3)5CN]++, negative. A value of the 57Fe quadrupole moment of 0.16 ± 0.03 has been determined by comparing the observed e2qQ values for the above Co(III) compounds with these calculated from PQS values for the corresponding hypothetical Fe(II) compounds. 相似文献
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Keith C. C. Bancroft Laila H. Morcos Guindi Arthur F. Temple 《Journal of heterocyclic chemistry》1978,15(8):1521-1523
Several 2,1,3-benzothiadiazin-4(3H) one 2,2-dioxides were synthesized as possible sweetening agents by reacting sulfamoyl chloride with various anthranilic acid derivatives. The isolation of 1-methyl-4-methoxy-2,1,3-benzothiadiazine 2,2-dioxide and preparation of 3,4-dihydro-2,1,3-benzothiadiazine 2,2-dioxide is also reported. 相似文献
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Measurements of synchrotron radiation emitted by 30-MeV runaway electrons in the TEXTOR-94 tokamak show that the runaway population decays after switching on neutral beam injection (NBI). The decay starts only with a significant delay, which decreases with increasing NBI heating power. This delay provides direct evidence of the energy dependence of runaway confinement, which is expected if magnetic modes govern the loss of runaways. Application of the theory by Mynick and Strachan [Phys. Fluids 24, 695 (1981)] yields estimates for the "mode width" (delta) of magnetic perturbations: delta<0.5 cm in Ohmic discharges, increasing to delta = 4.4 cm for 0. 6 MW NBI. 相似文献
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G. M. Bancroft 《Journal of Electron Spectroscopy and Related Phenomena》1977,10(4):407-413
Using synchrotron radiation as the photon source, high resolution electron spectra are reported for the outermost core d levels in Pb, Sn and In me 相似文献
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G.M. Bancroft I. Adams H. Lampe T.K. Sham 《Journal of Electron Spectroscopy and Related Phenomena》1976,9(2):191-204
X-ray photoelectron spectra have been recorded for a number of solid and gaseous organotin compounds. Solid-state charging effects (such as differential charge broadening) can be large, though we have almost eliminated them by subliming very thin films onto platinum metal. In this way, we have obtained solid-state Sn 3d line widths that are within 10% of the analogous gas-phase values. The quality and reproducibility of the solid-state spectra likewise approach those of gases.The general correlation between ESCA Sn 3d line widths and Mössbauer quadrupole splittings indicates that the broadening of the Sn 3d lines is due to crystal-field splitting from the C20 term (the quadrupole term) in the crystal-field expansion. There is a general correlation between ESCA binding energies and Mössbauer isomer shifts for the solids. 相似文献