scholarly journals The oxidation potentials of cis- and trans-1,2-diphenylcyclopropane and cis- and trans-2,3-diphenyloxirane

1979 ◽  
Vol 57 (16) ◽  
pp. 2098-2102 ◽  
Author(s):  
D. R. Arnold ◽  
P. C. Wong
Keyword(s):  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Phenyl Group ◽  
Membered Ring ◽  
Empirical Correlation ◽  
Charge Transfer Complexes ◽  
Long Wavelength ◽  
Oxidation Potentials ◽  
Electron Withdrawal ◽  
Cis And Trans

The oxidation potentials of cis- and trans-1,2-diphenylcyclopropane (1) and cis- and trans-2,3-diphenyloxirane (2) have been determined by cyclic voltammetry, spectroscopically (using an empirical correlation of the long wavelength transition of the charge-transfer complexes with tetracyanoethylene) and by using an empirical correlation based upon the gas phase ionization potentials measured by photoelectron spectroscopy. The values obtained by these three very different techniques agree to within ±0.15 V. The results are interpreted in terms of the initial formation of the phenyl radical cation with the three-membered ring intact. The higher oxidation potentials of cis- and trans-2, relative to those of cis- and trans-1, are attributed to inductive electron withdrawal from the phenyl group by the oxygen of the oxirane ring. The relevance of these results to the photosensitized (electron transfer) behaviour of these compounds is discussed.

Application of photoelectron spectroscopy to substituent effects. Conformational analysis of some flexible allylic ethers and alcohols

1979 ◽  
Vol 57 (14) ◽  
pp. 1890-1896 ◽  
Author(s):  
R. S. Brown ◽  
R. W. Marcinko ◽  
A. Tse
Keyword(s):  
Conformational Analysis ◽  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Ionization Energy ◽  
Substituent Effects ◽  
Allylic Alcohol ◽  
Tert Butyl ◽  
Cis And Trans ◽  
Allylic Ethers

He(I) photoelectron (pe) spectroscopy is applied to determine the preferred gas phase conformations of a limited number of flexible allylic ethers and alcohols. Based on earlier observations that the π-ionization energy is increased more when the allylic C—O bond is coplanar (with the π-system) than when it is perpendicular, the pe spectrum of cis and trans-4-tert-butyl-2-cyclohexanol and their corresponding ethers, and 5α-hydroxy(and methoxy)-10α-Δ3-octalin have been determined. The results indicate that when a coplanar arrangement of the allylic C—O bond can be attained, it is preferred, leading to a favored conformation of the allylic alcohol or ether.

Photoelectron Spectroscopy and Theoretical Study of AlnC5-/0 (n = 1-5) clusters: Structural Evolution, Relative Stability of Star-Like Cluster, and Planar Tetracoordinate Carbon Structure

2021 ◽  
Author(s):  
Chao-Jiang Zhang ◽  
Peng Wang ◽  
Xi-Ling Xu ◽  
Hong-Guang Xu ◽  
Weijun Zheng
Keyword(s):  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Relative Stability ◽  
Theoretical Study ◽  
Structural Evolution ◽  
Carbon Structure ◽  
Anion Photoelectron Spectroscopy

The AlnC5- (n = 1-5) clusters were detected in the gas-phase and were investigated by mass-selected anion photoelectron spectroscopy. The structures of AlnC5-/0 (n = 1-5) were explored by theoretical...

scholarly journals Dry Etching Performance and Gas-Phase Parameters of C6F12O + Ar Plasma in Comparison with CF4 + Ar

Materials ◽  
2021 ◽  
Vol 14 (7) ◽  
pp. 1595
Author(s):  
Nomin Lim ◽  
Yeon Sik Choi ◽  
Alexander Efremov ◽  
Kwang-Ho Kwon
Keyword(s):  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Reactive Ion Etching ◽  
Research Work ◽  
Optical Emission ◽  
Plasma Parameters ◽  
Ion Etching ◽  
Ar Plasma ◽  
Ar Gas ◽  
Etching Selectivity

This research work deals with the comparative study of C6F12O + Ar and CF4 + Ar gas chemistries in respect to Si and SiO2 reactive-ion etching processes in a low power regime. Despite uncertain applicability of C6F12O as the fluorine-containing etchant gas, it is interesting because of the liquid (at room temperature) nature and weaker environmental impact (lower global warming potential). The combination of several experimental techniques (double Langmuir probe, optical emission spectroscopy, X-ray photoelectron spectroscopy) allowed one (a) to compare performances of given gas systems in respect to the reactive-ion etching of Si and SiO2; and (b) to associate the features of corresponding etching kinetics with those for gas-phase plasma parameters. It was found that both gas systems exhibit (a) similar changes in ion energy flux and F atom flux with variations on input RF power and gas pressure; (b) quite close polymerization abilities; and (c) identical behaviors of Si and SiO2 etching rates, as determined by the neutral-flux-limited regime of ion-assisted chemical reaction. Principal features of C6F12O + Ar plasma are only lower absolute etching rates (mainly due to the lower density and flux of F atoms) as well as some limitations in SiO2/Si etching selectivity.

scholarly journals Negative ion photoelectron spectroscopy confirms the prediction that D3h carbon trioxide (CO3) has a singlet ground state

2016 ◽  
Vol 7 (2) ◽  
pp. 1142-1150 ◽  
Author(s):  
David A. Hrovat ◽  
Gao-Lei Hou ◽  
Bo Chen ◽  
Xue-Bin Wang ◽  
Weston Thatcher Borden
Keyword(s):  
Gas Phase ◽  
Ground State ◽  
Photoelectron Spectroscopy ◽  
Radical Anion ◽  
Negative Ion ◽  
Singlet Ground State

The CO3 radical anion (CO3˙−) has been formed by electrospraying carbonate dianion (CO32−) into the gas phase.

Unveiling the coexistence of cis- and trans-isomers in the hydrolysis of ZrO2: A coupled DFT and high-resolution photoelectron spectroscopy study

2020 ◽  
Vol 153 (24) ◽  
pp. 244308
Author(s):  
Ali Abou Taka ◽  
Mark C. Babin ◽  
Xianghai Sheng ◽  
Jessalyn A. DeVine ◽  
Daniel M. Neumark ◽  
...  
Keyword(s):  
High Resolution ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study ◽  
Trans Isomers ◽  
Cis And Trans Isomers ◽  
Cis And Trans ◽  
Hydrolysis Of

Nitrosyl Isocyanate (ONNCO):  Gas-Phase Generation and a HeI Photoelectron Spectroscopy Study

2005 ◽  
Vol 44 (25) ◽  
pp. 9283-9287 ◽  
Author(s):  
Xiaoqing Zeng ◽  
Maofa Ge ◽  
Zheng Sun ◽  
Dianxun Wang
Keyword(s):  
Gas Phase ◽  
Photoelectron Spectroscopy ◽  
Spectroscopy Study

DEVELOPMENT OF A CONICAL ENERGY ANALYZER FOR ANGLE-RESOLVED PHOTOELECTRON SPECTROSCOPY

2002 ◽  
Vol 09 (01) ◽  
pp. 583-586
Author(s):  
KOTA IWASAKI ◽  
KOICHIRO MITSUKE
Keyword(s):  
Gas Phase ◽  
Energy Resolution ◽  
Photoelectron Spectroscopy ◽  
Angular Resolution ◽  
Photoelectron Spectra ◽  
Sensitive Detector ◽  
Energy Analyzer ◽  
Position Sensitive ◽  
Pass Energy ◽  
Helium Discharge

A new angle-resolving electron energy analyzer composed of a conical electrostatic prism and a position-sensitive detector was developed for gas phase photoelectron spectroscopy. The performance of the analyzer has been tested by measuring photoelectron spectra of Ar using a helium discharge lamp. The angular resolution of 3° was achieved at the pass energy E of 5.6 eV. The best energy resolution was ΔE/E = 0.043 at E = 1.4 eV .

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