Primary Processes in the Vacuum Ultraviolet Photolysis of Ethyl Fluoride at 147 nm

1972 ◽  
Vol 50 (10) ◽  
pp. 1443-1447 ◽  
Author(s):  
S. C. Chan ◽  
Y. Inel ◽  
E. Tschuikow-Roux
Keyword(s):  
Energy Transfer ◽  
Pressure Dependence ◽  
Room Temperature ◽  
Vacuum Ultraviolet ◽  
Photochemical Reactions ◽  
Energy Transfer Efficiency ◽  
Gas Pressure ◽  
Inert Gas ◽  
Ultraviolet Photolysis ◽  
Ethyl Fluoride

The photolysis of C2H5F at 147 nm was studied at room temperature. The principal products include C2H3F, C2H2, C2H4, CH4, and C2H6. The principal primary photochemical reactions involve the molecular elimination of HF and H2, and, to a lesser extent, C—F and C—C bond fission. The effect of reactant and added inert gas pressure on the product yields has been investigated and it was found that the stabilization/decomposition ratio, C2H4/C2H2, displays opposite pressure dependence with ethyl fluoride and argon. This result is interpreted in terms of the higher energy transfer efficiency of the C2H5F molecule.

Gas Pressure Dependence of Photon Emission Accompanying Fracture of Polycrystalline MgO in Nitrogen

2006 ◽  
Vol 317-318 ◽  
pp. 313-316 ◽  
Author(s):  
Tadashi Shiota ◽  
Yasuo Toyoshima ◽  
Kouichi Yasuda ◽  
Yohtaro Matsuo
Keyword(s):  
Pressure Dependence ◽  
Room Temperature ◽  
Photon Emission ◽  
Gas Discharge ◽  
Gas Pressure ◽  
The Other ◽  
Experimental Conditions ◽  
Infrared Photon ◽  
Gas Pressures

The photon emission accompanying fracture of a polycrystalline MgO was investigated at room temperature under N2 gas pressures from 10-4 to 105 Pa. At fracture, the ultraviolet, visible and infrared photon emissions instantaneously increased, and then rapidly decreased in most of the experimental conditions. However, in a N2 gas pressure of around 100 Pa, their peak counts lasted for about 10 milliseconds, and the amount of the UV photon emission was fifteen times larger than those obtained in the other N2 gas pressures. This abrupt increment in the emission was explained by the luminescence due to N2 gas discharge according to the classical Townsend’s theory. In conclusion, the photon emission accompanying fracture of a polycrystalline MgO mainly originated from the excited defects as reported by the authors previously, but the N2 gas discharge had a supplementary effect on the emission around a specific N2 gas pressure.

Two channel competitive photodecomposition reaction of gaseous bromoethane at 193.1 nm

1983 ◽  
Vol 61 (11) ◽  
pp. 2486-2489 ◽  
Author(s):  
Kyung-Hoon Jung ◽  
Chong Mok Lee ◽  
Hee Soo Yoo
Keyword(s):  
Room Temperature ◽  
Vacuum Ultraviolet ◽  
Constant Pressure ◽  
Radical Reaction ◽  
Quantum Yields ◽  
Radical Scavenger ◽  
Reaction Products ◽  
Principal Reaction ◽  
Ultraviolet Photolysis ◽  
Pressure Independent

The vacuum ultraviolet photolysis of gas phase bromoethane at 193.1 nm (6.42 eV) was studied over the pressure range of 1.1–303.2 Torr at room temperature using a carbon atom lamp. The pressure effect with and without inert gas, i.e., He or N2, was investigated. A scavenger effect of the reaction was also observed by adding NO as a radical scavenger. The principal reaction products were C2H6, C2H4, 1,1-C2H4Br2, and n-C4H10. The quantum yields of C2H4 and C2H6 were found to increase slightly with the reactant pressure. When the pressure of He or N2 was varied at a constant pressure of C2H5Br, however, the quantum yields of C2H4 and C2H6 were found to be pressure independent. Addition of NO completely suppressed the formation of C2H6, C2H4Br2, and C4H10, and partially reduced that of C2H4. These results were interpreted in terms of two channel competition between the molecular elimination and the formation of radicals. Two different decomposition modes were 82% radical reaction and 18% molecular elimination.

The study of intramolecular decay and intermolecular energy transfer for phosphorescent organic light-emitting devices

2021 ◽  
Vol 23 (12) ◽  
pp. 7495-7503
Author(s):  
Wanlin Cai ◽  
Kai Ren ◽  
Ancong Zhao ◽  
Xiulan Wu ◽  
Rongxing He ◽  
...  
Keyword(s):  
Energy Transfer ◽  
Rational Design ◽  
Energy Transfer Efficiency ◽  
Transfer Efficiency ◽  
Light Emitting ◽  
Light Emitting Devices ◽  
Organic Light ◽  
Intermolecular Energy ◽  
Intermolecular Energy Transfer ◽  
Organic Light Emitting Devices

Compared to the PtOO7-based system, the greater EQE of the PtON7-based system is mainly governed by the stronger energy transfer efficiency (ηEET); thus, it is necessary to evaluate ηEET from hosts to guests for the rational design of OLEDs.

Room temperature phosphorimetric determination of bromate in flour based on energy transfer

Talanta ◽  
2013 ◽  
Vol 116 ◽  
pp. 231-236 ◽  
Author(s):  
Mario Menendez-Miranda ◽  
Maria T. Fernandez-Argüelles ◽  
Jose M. Costa-Fernandez ◽  
Rosario Pereiro ◽  
Alfredo Sanz-Medel
Keyword(s):  
Energy Transfer ◽  
Room Temperature
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