Remote THz Monitoring of an Evolving Gas-Phase Mixture

CLEO: 2013 ◽  
2013 ◽  
Author(s):  
Joseph S. Melinger ◽  
Yihong Yang ◽  
Maboubeh Mandeghar ◽  
D. Grischkowsky
Keyword(s):  
Gas Phase ◽  
Phase Mixture

The photolysis and radiolysis of H2S−CH4 gas-phase mixture

1987 ◽  
Vol 119 (2) ◽  
pp. 95-100
Author(s):  
M. A. Kurbanov ◽  
V. R. Rustamov ◽  
Kh. F. Mamedov ◽  
Z. I. Iskenderova
Keyword(s):  
Gas Phase ◽  
Phase Mixture

scholarly journals Detecting Chirality in Mixtures Using Nanosecond Photoelectron Circular Dichroism

2022 ◽  
Author(s):  
Simon Ranecky ◽  
G. Barratt Park ◽  
Peter C Samartzis ◽  
Ioannis C. Giannakidis ◽  
Dirk Schwarzer ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
High Resolution ◽  
Gas Phase ◽  
Molecular Beams ◽  
Structural Isomers ◽  
Photon Ionization ◽  
Phase Mixture ◽  
Circular Dichroïsm

We report chirality detection of structural isomers in a gas phase mixture using nanosecond photoelectron circular dichroism (PECD). Combining pulsed molecular beams with high-resolution resonance enhanced multi-photon ionization (REMPI) allows...

Amine-functionalized microporous covalent organic polymers for adsorptive removal of a gaseous aliphatic aldehyde mixture

2020 ◽  
Vol 7 (11) ◽  
pp. 3447-3468
Author(s):  
Kumar Vikrant ◽  
Yao Qu ◽  
Ki-Hyun Kim ◽  
Danil W. Boukhvalov ◽  
Wha-Seung Ahn
Keyword(s):  
Volatile Organic Compounds ◽  
Gas Phase ◽  
Organic Compounds ◽  
Aliphatic Aldehyde ◽  
Organic Polymers ◽  
Adsorptive Removal ◽  
Amine Functionalized ◽  
Effective Removal ◽  
Volatile Organic ◽  
Phase Mixture

To pursue effective removal of gaseous volatile organic compounds (VOCs), adsorptive removal of a six-component aliphatic aldehyde gas phase mixture was investigated using two amine-functionalized microporous covalent organic polymers (COPs).

Start-up, performance and optimization of a compost biofilter treating gas-phase mixture of benzene and toluene

2015 ◽  
Vol 190 ◽  
pp. 529-535 ◽  
Author(s):  
Eldon R. Rene ◽  
Saurajyoti Kar ◽  
Jagannathan Krishnan ◽  
K. Pakshirajan ◽  
M. Estefanía López ◽  
...  
Keyword(s):  
Gas Phase ◽  
Start Up ◽  
Phase Mixture

scholarly journals The Production of IF(B3Π) in the 248 nm Laser Photolysis of Fluorine/Alkyl Iodide Mixtures

1988 ◽  
Vol 9 (4-6) ◽  
pp. 369-384 ◽  
Author(s):  
D. Raybone ◽  
T. M. Watkinson ◽  
J. C. Whitehead ◽  
F. Winterbottom
Keyword(s):  
Gas Phase ◽  
Ground State ◽  
Alkyl Radical ◽  
Alkyl Iodide ◽  
Collisional Excitation ◽  
B Decays ◽  
Atomic Fluorescence ◽  
Strong Function ◽  
Dark Reaction ◽  
Phase Mixture

Sustained visible emission in the region 440–850 nm from the B → X system of IF is observed when a gas phase mixture (~0.5 mbar) of an alkyl iodide with F2 in He is photolysed at 248 nm by a KrF laser. The total intensity and decay rate of the IF(B) emission is a strong function of the identity of the alkyl iodide and can be correlated with the 248 nm photon yields for the production of I*(2p1/2). The half-lives for the IF(B) decays range from 5 μs for t-C4H9I to 770 μs for n-C3F7I. Decay curves for the I*(2p1/2) concentrations are also measured by atomic fluorescence. The mechanism for IF(B) formation in these systems is discussed and it is suggested that IF(B) is produced either by a recombination process involving I* and F atoms or by multistep collisional excitation of ground state IF(X) by I*. The F atoms can be produced following the photolysis pulse by the reaction of the alkyl radical with molecular fluorine and IF(X) can result either from the reaction of F atoms with the alkyl iodide or from a dark reaction between molecular fluorine and the alkyl iodide.

Residual Gas Reactions in the Electron Microscope: I. Qualitative Observations on the Water Gas Reaction

1968 ◽  
Vol 26 ◽  
pp. 292-293
Author(s):  
Richard E. Hartman ◽  
Roberta S. Hartman ◽  
Peter L. Ramos
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Gas Phase ◽  
Absolute Temperature ◽  
Residual Gas ◽  
Gas Reactions ◽  
Image Position ◽  
The Right ◽  
Water Gas ◽  
Thinning Rate

The action of water and the electron beam on organic specimens in the electron microscope results in the removal of oxidizable material (primarily hydrogen and carbon) by reactions similar to the water gas reaction .which has the form:The energy required to force the reaction to the right is supplied by the interaction of the electron beam with the specimen.The mass of water striking the specimen is given by:where u = gH2O/cm2 sec, PH2O = partial pressure of water in Torr, & T = absolute temperature of the gas phase. If it is assumed that mass is removed from the specimen by a reaction approximated by (1) and that the specimen is uniformly thinned by the reaction, then the thinning rate in A/ min iswhere x = thickness of the specimen in A, t = time in minutes, & E = efficiency (the fraction of the water striking the specimen which reacts with it).

Integration of Core-Edge Spectroscopy Methods for the Study of Polymers

1996 ◽  
Vol 54 ◽  
pp. 154-155
Author(s):  
E. G. Rightor
Keyword(s):  
Excited State ◽  
Polymer Blends ◽  
Gas Phase ◽  
Spatial Resolution ◽  
High Spatial Resolution ◽  
Electronic States ◽  
Core Electron ◽  
Bulk Solids ◽  
Development Application

Core edge spectroscopy methods are versatile tools for investigating a wide variety of materials. They can be used to probe the electronic states of materials in bulk solids, on surfaces, or in the gas phase. This family of methods involves promoting an inner shell (core) electron to an excited state and recording either the primary excitation or secondary decay of the excited state. The techniques are complimentary and have different strengths and limitations for studying challenging aspects of materials. The need to identify components in polymers or polymer blends at high spatial resolution has driven development, application, and integration of results from several of these methods.

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