Theory and application of photoelectron spectroscopy. 100. Variable-temperature photoelectron spectral study of 1,3-dithiol-2-one and 4,5-disubstituted 1,3-dithiol-2-ones. Thermal generation of 1,2-dithiete, 3,4-disubstituted 1,2-dithietes, and dialkyl tetrathiooxalates

1983 ◽  
Vol 105 (14) ◽  
pp. 4519-4528 ◽  
Author(s):  
Reinhard Schulz ◽  
Armin Schweig ◽  
Klaus Hartke ◽  
Joachim Koester
Keyword(s):  
Photoelectron Spectroscopy ◽  
Spectral Study ◽  
Variable Temperature ◽  
Thermal Generation

Tautomerism of pyrazoline-5-thione and triazoline-5-thione studied by variable temperature photoelectron spectroscopy

1983 ◽  
Vol 61 (6) ◽  
pp. 1197-1203 ◽  
Author(s):  
Claude Guimon ◽  
Geneviève Pfister-Guillouzo ◽  
Mlkael Begtrup
Keyword(s):  
Gaseous Phase ◽  
Photoelectron Spectroscopy ◽  
Variable Temperature ◽  
Thermal Isomerization ◽  
Photoelectron Spectra ◽  
Planar Form ◽  
Mndo Calculations

Photoelectron spectra at variable temperatures demonstrate that the rate of thermal isomerization of pyrazoline-5-thione (1a) into methylthiopyrazole(s) in the gaseous phase is metal catalysed. Similar isomerizations of triazolethione (2a and 3a) are at best only slightly so.Furthermore, photoelectron spectra and MNDO calculations show that gaseous methylthiopyrazoles (1b and 1c) and methylthiotriazoles (2b and 2c) exist predominantly in planar form for the b isomer and in nonplanar form for the c isomer. The ΔH0 for the rotameric equilibria is 2.7–4.2 kJ•mol−1.

Cycloalkylidenselenoketene durch Pyrolyse von 1,2,3-Selenadiazolen — Untersuchungen mit der temperaturabhängigen PE-Spektroskopie und Matrix-IR-Spektroskopie [1]

1984 ◽  
Vol 39 (11) ◽  
pp. 1536-1540 ◽  
Author(s):  
Reinhard Schulz ◽  
Armin Schweig
Keyword(s):  
Liquid Phase ◽  
Ir Spectroscopy ◽  
Ir Spectra ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Variable Temperature ◽  
Matrix Ir Spectroscopy

Abstract The gas-phase pyrolysis of cyclohexeno-1,2,3-selenadiazole and cycloocteno-1,2,3-selenadiazole has been investigated by variable temperature photoelectron spectroscopy and matrix IR spectroscopy. The ring contracted, highly reactive products cyclopentylidenselenoketene (cyclopentylidenmethanselone) and cycloheptylidenselenoketene (cycloheptylidenmethanselone) - which had not been found in liquid phase thermolysis experiments - have been detected. Additionally HeI photoelectron and IR spectra of analogous ketenes and thioketenes are presented for comparative reasons.

FUNCTIONALIZATION EFFECT ON THE ELECTRONIC PROPERTIES OF SINGLE WALLED CARBON NANOTUBES

2008 ◽  
Vol 01 (01) ◽  
pp. 1-6 ◽  
Author(s):  
SAN HUA LIM ◽  
JIANYI LIN ◽  
LEI LIU ◽  
HUI PAN ◽  
HUA LONG PAN ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Raman Scattering ◽  
Photoelectron Spectroscopy ◽  
Energy Gap ◽  
Variable Temperature ◽  
Ultra Violet ◽  
Single Walled Carbon Nanotubes ◽  
Bulk Sample ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

OH-functionalized single-walled carbon nanotubes (SWNTs), i.e. SWNT–OH, were prepared through the ball-milling of purified SWNTs with KOH. The composition of the pristine SWNTs bulk sample was characterized by resonance Raman scattering. The OH-functionalization-induced shrinking of the energy gap, the charge transfer from C to –OH, the depletion of top valence band density, the modification of energy band structure and the significant reduction in the work function of SWNTs were experimentally studied by variable temperature FTIR, Raman scattering, ultra-violet photoelectron spectroscopy, X-ray photoelectron energy loss spectroscopy etc. Ab initio calculation was also performed to assist the discussion.

Notizen: Monitoring Chemical Reactions by Variable Temperature Photoelectron Spectroscopy. A New Thermal Reaction

1975 ◽  
Vol 30 (12) ◽  
pp. 1785-1786
Author(s):  
Werner Schäfer ◽  
Armin Schweig
Keyword(s):  
Chemical Reactions ◽  
Hydrogen Sulphide ◽  
Photoelectron Spectroscopy ◽  
Variable Temperature ◽  
Low Pressure ◽  
Thermal Reaction

Abstract Variable temperature photoelectron (vtpe) spectroscopy is applied to ethane-1,2-dithiol. Thereby it is shown that this molecule thermally reacts to thiirane and hydrogen sulphide at the very low pressure applied in the pe experiment.

Erzeugung und Untersuchung des Cyclopentadienons mit der Methode der temperaturabhängigen Photoelektronenspektroskopie / Preparation and Investigation of Cyclopentadienone by Variable Temperature Photoelectron Spectroscopy (VTPES)

1978 ◽  
Vol 33 (3) ◽  
pp. 383-385 ◽  
Author(s):  
Veit Eck ◽  
Günther Lauer ◽  
Armin Schweig ◽  
Walter Thiel ◽  
Hans Vermeer
Keyword(s):  
Dicarboxylic Acid ◽  
Gas Phase ◽  
Configuration Interaction ◽  
Photoelectron Spectroscopy ◽  
Large Scale ◽  
Variable Temperature ◽  
Acid Anhydride ◽  
Selection Procedures ◽  
Scale Perturbation ◽  
Configuration Interaction Calculations

AbstractUsing our VTPES technique cyclopentadienone is generated in the gas phase at 500-600 °C from the three different precursors cyclobutene-3,4-dicarboxylic acid anhydride, o-phenylene sulfite and o-benzoquinone and its PE spectrum is recorded. The PE spectrum and also the PE spectra of the various precursors as well as of the cyclopentadienone dimer are interpreted on the basis of our recently developed PERTCI method (i. e. performing large scale perturbation configuration interaction calculations in connection with selection procedures). The agreement between measured and calculated ionization potentials is good.

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