Phosphorescence Lifetime of S02 in the ã3B1 State at Low Pressure

1975 ◽  
Vol 53 (14) ◽  
pp. 2133-2139 ◽  
Author(s):  
J. Philip Briggs ◽  
Robert B. Caton ◽  
Michael J. Smith
Keyword(s):  
Decay Rate ◽  
Electronic State ◽  
Rate Constant ◽  
Pressure Range ◽  
Low Pressure ◽  
Nonradiative Relaxation ◽  
Phosphorescence Lifetime ◽  
Pressure Decay ◽  
Emission Decay ◽  
Spherical Container

The emission decay rate (inverse lifetime) of the optically-excited ã3B1 electronic state of SO2 vapor at approximately 25 °C has been measured in a 35 cm diameter spherical container over the pressure range 1 < P < 500 m Torr in pure SO2 and in mixtures of SO2 with He, Ar, or Xe. The Stern–Volmer rate constant for quenching by [Formula: see text]was determined to be (4.46 ± 0.11) × 108 1 mol−1 s−1, and the extrapolated, zero-pressure decay rate was calculated to be (3.75 ± 0.58) × 102 s−1. The latter quantity implies a considerably greater proportionate contribution by radiative, as opposed to nonradiative, relaxation of this state than has been reported previously.

Ion–molecule reactions in dimethylsulfoxide by high pressure photoionization mass spectrometry

1980 ◽  
Vol 58 (4) ◽  
pp. 376-380 ◽  
Author(s):  
John A. Stone ◽  
Margaret S. Lin
Keyword(s):  
Mass Spectrometry ◽  
High Pressure ◽  
Photon Energy ◽  
Rate Constant ◽  
Pressure Range ◽  
Low Pressure ◽  
Photoionization Mass Spectrometry ◽  
Ion Molecule Reactions

Dimethylsulfoxide (DMSO) has been photoionized at 10.0 and 11.7 eV over the pressure range 0.3–210 mTorr. The rate constant for the disappearance of DMSO+ is 1.0 × 10−9 cm3 molecule−1 s−1, independent of photon energy. The major products at low pressure are CH3SO(CH3SO)CH3+ and CH3SOHCH3+ while at high pressure the ion series (DMSO)nH+ predominates with n ≤ 5. In experiments with mixtures of DMSO and water or methanol very little mixed solvation of the proton was observed although isotopic D/H exchange between D2O and (DMSO)2H+ is facile.

Dynamic Viscosity of Compressed Water to 10 Kilobar and Steam to 1500°C

1969 ◽  
Vol 11 (2) ◽  
pp. 189-205 ◽  
Author(s):  
E. A. Bruges ◽  
M. R. Gibson
Keyword(s):  
Gaseous Phase ◽  
Dynamic Viscosity ◽  
Low Temperatures ◽  
Pressure Range ◽  
Low Pressure ◽  
Temperature Range ◽  
Inversion Temperature ◽  
Pressure Steam ◽  
Correlating Equations ◽  
First Time

Equations specifying the dynamic viscosity of compressed water and steam are presented. In the temperature range 0-100cC the location of the inversion locus (mu) is defined for the first time with some precision. The low pressure steam results are re-correlated and a higher inversion temperature is indicated than that previously accepted. From 100 to 600°C values of viscosity are derived up to 3·5 kilobar and between 600 and 1500°C up to 1 kilobar. All the original observations in the gaseous phase have been corrected to a consistent set of densities and deviation plots for all the new correlations are given. Although the equations give values within the tolerances of the International Skeleton Table it is clear that the range and tolerances of the latter could with some advantage be revised to give twice the existing temperature range and over 10 times the existing pressure range at low temperatures. A list of the observations used and their deviations from the correlating equations is available as a separate publication.

Unprecedented CO2 adsorption behaviour by 5A-type zeolite discovered in lower pressure region and at 300 K

2021 ◽  
Author(s):  
Akira Oda ◽  
Suguru Hiraki ◽  
Eiji Harada ◽  
Ikuka Kobayashi ◽  
Takahiro Ohkubo ◽  
...  
Keyword(s):  
Pressure Range ◽  
Co2 Adsorption ◽  
Low Pressure ◽  
Lower Pressure ◽  
Dft Studies ◽  
Adsorption Behaviour ◽  
Zeolite Sample ◽  
Pressure Region ◽  
Type Zeolite ◽  
Efficient Adsorbent

The NaCaA-85 zeolite sample which works as an efficient adsorbent for CO2 at RT and in low pressure range was found and its specificity is nicely explained by the model composed of CO2 pinned by two types of Ca2+ ions through far-IR and DFT studies.

scholarly journals An ICR Study of an Association Reaction at Low Pressure

1980 ◽  
Vol 87 ◽  
pp. 305-306
Author(s):  
M.J. Mcewan ◽  
V. G. Anicich ◽  
W.T. Huntress ◽  
P. R. Kemperer ◽  
M. T. Bowers
Keyword(s):  
Pressure Range ◽  
Rate Coefficient ◽  
Low Pressure ◽  
Second Order ◽  
Radiative Association ◽  
Association Reaction

An ICR investigation of the association reactionCH3+ + HCN CH3.HCN+has shown the reaction follows second order kinetics over the pressure range 1 × 10-6 to 3 × 10-4 Torr with a rate coefficient of 2 × 10-10 cm3s-1. These results can be interpreted in terms of a saturated 3-body or radiative association mechanism.

Application of Pressure-Sensitive Paints to Low-Pressure Range

2005 ◽  
Vol 19 (1) ◽  
pp. 9-16 ◽  
Author(s):  
Tomohide Niimi ◽  
Masaki Yoshida ◽  
Makoto Kondo ◽  
Yusuke Oshima ◽  
Hideo Mori ◽  
...  
Keyword(s):  
Pressure Range ◽  
Low Pressure ◽  
Pressure Sensitive

Determination of the decay rate constant for hepatocytes immobilized in alginate microcapsules

2010 ◽  
Vol 27 (1) ◽  
pp. 86-93 ◽  
Author(s):  
Aldo Leal-Egaña ◽  
Aránzazu Díaz-Cuenca ◽  
Augustinus Bader
Keyword(s):  
Decay Rate ◽  
Rate Constant ◽  
Decay Rate Constant

Optimum pressure range evaluation toward aerodynamic measurements using PSP in low-pressure conditions

2020 ◽  
Vol 31 (8) ◽  
pp. 085303 ◽  
Author(s):  
Takayuki Nagata ◽  
Miku Kasai ◽  
Tomohiro Okudera ◽  
Hitomi Sato ◽  
Taku Nonomura ◽  
...  
Keyword(s):  
Pressure Range ◽  
Low Pressure ◽  
Optimum Pressure

Facile synthesis of carbon-based nanoporous adsorbent exhibiting high ammonia uptake under low pressure range

2020 ◽  
Vol 307 ◽  
pp. 110460
Author(s):  
Kanghee Cho ◽  
Hyung Chul Yoon ◽  
Hee Tae Beum ◽  
Sun Hyung Kim ◽  
Chan Hyun Lee ◽  
...  
Keyword(s):  
Pressure Range ◽  
Low Pressure ◽  
Facile Synthesis ◽  
Ammonia Uptake ◽  
High Ammonia ◽  
Carbon Based
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