ChemInform Abstract: The Vibronic Structure in the Emission Spectra of Some Thienylpyridine Complexes

ChemInform ◽  
2010 ◽  
Vol 28 (39) ◽  
pp. no-no
Author(s):  
A. C. STUECKL
Keyword(s):  
Emission Spectra ◽  
Vibronic Structure

Rotational and vibronic structure in the electronic spectra of linear open-shell cations

1988 ◽  
Vol 324 (1578) ◽  
pp. 209-221 ◽  
Keyword(s):  
Emission Spectra ◽  
Open Shell ◽  
Stimulated Emission ◽  
Rotational Structure ◽  
Impact Excitation ◽  
Electron Impact Excitation ◽  
Excitation Spectra ◽  
Vibronic Structure ◽  
Complementary Techniques ◽  
Distinct Features

The vibrational and rotational structure of the electronic transitions of open-shell cations of linear polyatomics has been studied by three complementary techniques. In one, the emission spectra of ions of unstable species, XCP + and XBS + , with X = H, D and F, are obtained by electron-impact excitation on effusive and supersonic free jets. The vibronic structure of their A1 2£ + —> X2IIi band systems could be analysed. The changes and distinct features of the rotational profiles at low rotational temperatures in the emission spectra of diacetylene cation have been used to establish the absolute numbering in the rotational analysis of the A2Hu-X 2Hg transition. The second approach is based on the measurement of the laser excitation spectra of ions and has been used to confirm the vibrational assignment of complex emission spectra, such as the B2H -» X2IT transition of C1CN+, and to resolve the rotational structure in the A2H| <— X2Hz transitions of the haloacetylene cations XCCH+, X — Cl, Br, I. The most recent development is the demonstration that the stimulated emission pumping approach can be used to probe the electronic structure of ions in a flow system.

Nano-probe x-ray analysis and high-resolution imaging on planar defects in high-pressure synthesized infinite-layer superconductor

1994 ◽  
Vol 52 ◽  
pp. 728-729
Author(s):  
Y. Y. Wang ◽  
H. Zhang ◽  
V. P. Dravid ◽  
H. Zhang ◽  
L. D. Marks ◽  
...  
Keyword(s):  
High Pressure ◽  
High Resolution ◽  
Atomic Structure ◽  
Emission Spectra ◽  
High Resolution Electron Microscopy ◽  
Planar Defects ◽  
X Ray ◽  
Infinite Layer ◽  
Resolution Electron ◽  
Resolution Imaging

Azuma et al. observed planar defects in a high pressure synthesized infinitelayer compound (i.e. ACuO2 (A=cation)), which exhibits superconductivity at ~110 K. It was proposed that the defects are cation deficient and that the superconductivity in this material is related to the planar defects. In this report, we present quantitative analysis of the planar defects utilizing nanometer probe xray microanalysis, high resolution electron microscopy, and image simulation to determine the chemical composition and atomic structure of the planar defects. We propose an atomic structure model for the planar defects.Infinite-layer samples with the nominal chemical formula, (Sr1-xCax)yCuO2 (x=0.3; y=0.9,1.0,1.1), were prepared using solid state synthesized low pressure forms of (Sr1-xCax)CuO2 with additions of CuO or (Sr1-xCax)2CuO3, followed by a high pressure treatment.Quantitative x-ray microanalysis, with a 1 nm probe, was performed using a cold field emission gun TEM (Hitachi HF-2000) equipped with an Oxford Pentafet thin-window x-ray detector. The probe was positioned on the planar defects, which has a 0.74 nm width, and x-ray emission spectra from the defects were compared with those obtained from vicinity regions.

Self-Consistent Field Calculations of X-Ray Emission Spectra of Surface Adsorbates and Polymers

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-515-C2-516
Author(s):  
H. Agren ◽  
L. G.M. Pettersson ◽  
V. Carravetta ◽  
Y. Luo ◽  
L. Yang ◽  
...  
Keyword(s):  
Emission Spectra ◽  
X Ray ◽  
Consistent Field ◽  
Self Consistent ◽  
Surface Adsorbates ◽  
Self Consistent Field

High resolution emission spectra of H2 and D2 near 80 nm

1980 ◽  
Vol 41 (12) ◽  
pp. 1431-1436 ◽  
Author(s):  
M. Larzillière ◽  
F. Launay ◽  
J.-Y. Roncin
Keyword(s):  
High Resolution ◽  
Emission Spectra

125Te MÖSSBAUER EMISSION SPECTRA OF TELLURIUM THIOUREA COMPLEXES

1979 ◽  
Vol 40 (C2) ◽  
pp. C2-417-C2-419
Author(s):  
C. H.W. Jones ◽  
M. Dombsky
Keyword(s):  
Emission Spectra

MÖSSBAUER EMISSION SPECTRA FROM57Co IN SIMPLE IONIC HALIDE CRYSTALS

1974 ◽  
Vol 35 (C6) ◽  
pp. C6-324-C6-324
Author(s):  
A. G. MADDOCK ◽  
A. F. WILLIAMS ◽  
J. FENGER ◽  
K. E. SIERKIERSKA
Keyword(s):  
Emission Spectra

EXPERIMENTAL AND THEORETICAL SOFT X-RAY EMISSION SPECTRA OF Cu-Pd SUBSTITUTIONAL ALLOYS

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-1059-C9-1062
Author(s):  
P. J. DURHAM ◽  
C. F. HAGUE ◽  
J.-M. MARIOT ◽  
W. M. TEMMERMAN
Keyword(s):  
Emission Spectra ◽  
X Ray ◽  
Substitutional Alloys
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