scholarly journals High-Resolution Non-Resonant Two-Photon Threshold Photoionization of Propyne

1996 ◽  
Vol 16 (3) ◽  
pp. 151-156 ◽  
Author(s):  
Hiroshi Matsui ◽  
Yi-Fei Zhu ◽  
Edward R. Grant
Keyword(s):  
Ground State ◽  
Photoelectron Spectroscopy ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Teller Distortion ◽  
Two Photon ◽  
Spin Orbit Splitting ◽  
Zero Kinetic Energy ◽  
Jahn Teller ◽  
Zeke Photoelectron Spectroscopy

Using techniques of delayed pulsed-field ionization zero-kinetic-energy (ZEKE) photoelectron spectroscopy, we have resolved spin-orbit structure in the rotational profile of the origin band in the non-resonant two-photon threshold photoionization of propyne. Both the rotational and spin-orbit characteristics of this band are well-simulated by a simple model that assumes the spin-orbit splitting of acetylene cation in combination with the rotational constants of the neutral propyne ground state. This result, combined with very little evidence for photoionizing transitions terminating on vibronically excited states, suggests that the structure of the propyne cation structure is very close to that of the neutral ground state and very little altered by Jahn-Teller distortion.

Spin -Orbit Coupling in the O-2 Anion

1995 ◽  
Vol 50 (11) ◽  
pp. 1041-1044 ◽  
Author(s):  
J. Schiedt ◽  
R. Weinkauf
Keyword(s):  
High Resolution ◽  
Electron Energy ◽  
Ground State ◽  
Photoelectron Spectroscopy ◽  
Spin Orbit Coupling ◽  
Spin Orbit ◽  
Energy Analyzer ◽  
Orbit Splitting ◽  
Spin Orbit Splitting ◽  
Good Agreement

Abstract We could resolve the spin-orbit splitting of 160 ± 4 cm-1 in the 2II ground state of O2- anions by high resolution photodetachment photoelectron spectroscopy. The observed splitting is in good agreement with the theoretically derived value. Our directly measured electron affinity of O 2 is 450 ± 2 meV and deviates within experiment errors from previous values. kHz repetition rate was applied to avoid space charge and improve electron energy resolution in a time-of-flight electron energy analyzer.

scholarly journals Impact of spin-orbit splitting on two-photon absorption spectra in a halide perovskite single crystal

2021 ◽  
Vol 103 (4) ◽  
Author(s):  
Keiichi Ohara ◽  
Takumi Yamada ◽  
Tomoko Aharen ◽  
Hirokazu Tahara ◽  
Hideki Hirori ◽  
...  
Keyword(s):  
Single Crystal ◽  
Absorption Spectra ◽  
Photon Absorption ◽  
Spin Orbit ◽  
Orbit Splitting ◽  
Two Photon Absorption ◽  
Two Photon ◽  
Spin Orbit Splitting ◽  
Halide Perovskite

Darstellung, Eigenschaften und elektronische Raman-Spektren von Di(bromo)phthalocyaninatometallaten(III) der Eisengruppe / Synthesis, Properties and Electronic Raman Spectra of Di(bromo)phthalocyaninatometalates(III) of the Iron Group Elements

1994 ◽  
Vol 49 (1) ◽  
pp. 50-56 ◽  
Author(s):  
Svend Sievertsen ◽  
Hendrik Schlehahn ◽  
Heiner Homborg
Keyword(s):  
Raman Spectra ◽  
Ground State ◽  
Electronic Spectra ◽  
Spin Orbit ◽  
Iron Group ◽  
Orbit Splitting ◽  
Spin Orbit Splitting ◽  
Synthesis Properties ◽  
Ct Transitions ◽  
Fir Spectra

Abstract Low spin di(bromo)phthalocyaninatometalates of tervalent iron, ruthenium and osmium ([MBr2Pc2-]-) are formed by the reaction of [FeBrPc2-] or H[MBr2Pc2-] (M = Ru, Os) with excess bromide in DMF or THF and isolated as (nBu4N)+ salts. The electronic spectra show the typical π- π*- transitions (B, Q, N region) of the Pc2- ligand together with a number of extra bands due to trip-multiplett and (Pc, Br → M)CT transitions. νs(MBr) is observed in the resonance Raman (RR) spectrum (RR enhanced for M = Fe, Ru) at 161 cm-1 (Fe), 183 cm-1 (Ru) and 192 cm-1 (Os), νas(MBr) at 251 cm-1 (Fe), 234 cm-1 (Ru) and 218 cm-1 (Os) in the FIR spectra. The RR spectra obtained by excitation at low absorbance between the B and Q region are dominated by the intraconfigurational " Γ7 →Γ 8" transition due to spin orbit splitting of the 2T2g ground state for Fe at 583 cm-1, Ru at 1026/1050 cm-1 and Os at 3131 cm-1 . In the MIR resp. NIR spectra vibronically induced transitions are observed for the Ru or Os complex.

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