On the zirconium oxide neutral cluster distribution in the gas phase: Detection through 118 nm single photon, and 193 and 355 nm multiphoton, ionization

2004 ◽  
Vol 120 (9) ◽  
pp. 4142-4149 ◽  
Author(s):  
Y. Matsuda ◽  
D. N. Shin ◽  
E. R. Bernstein
Keyword(s):  
Gas Phase ◽  
Zirconium Oxide ◽  
Single Photon ◽  
Multiphoton Ionization ◽  
Phase Detection ◽  
Neutral Cluster ◽  
Cluster Distribution

11H-Pyrido[2,1-b]quinazolin-11-one - A reversible Turn-on/off Fluorescent Probe for Solution and Gas-phase Detection of Acids or Basic Amines

2021 ◽  
pp. 109536
Author(s):  
João Victor L. Silva Néto ◽  
Rodolfo I. Teixeira ◽  
Ramon B. da Silva ◽  
Nanci C. de Lucas ◽  
Simon J. Garden
Keyword(s):  
Gas Phase ◽  
Fluorescent Probe ◽  
Phase Detection ◽  
Turn On

First gas-phase detection of dimethylgermylene and time-resolved study of some of its reactions

1996 ◽  
Vol 250 (1) ◽  
pp. 111-119 ◽  
Author(s):  
R. Becerra ◽  
S.E. Boganov ◽  
M.P. Egorov ◽  
V.Ya. Lee ◽  
O.M. Nefedov ◽  
...  
Keyword(s):  
Gas Phase ◽  
Phase Detection ◽  
Time Resolved

scholarly journals Water-cluster distribution with respect to pressure and temperature in the gas phase

1993 ◽  
Vol 48 (5) ◽  
pp. 3764-3770 ◽  
Author(s):  
Byung Jin Mhin ◽  
Sang Joo Lee ◽  
Kwang S. Kim
Keyword(s):  
Gas Phase ◽  
Water Cluster ◽  
Cluster Distribution

Gas Phase Detection of the NH–P Hydrogen Bond and Importance of Secondary Interactions

2015 ◽  
Vol 119 (44) ◽  
pp. 10988-10998 ◽  
Author(s):  
Kristian H. Møller ◽  
Anne S. Hansen ◽  
Henrik G. Kjaergaard
Keyword(s):  
Hydrogen Bond ◽  
Gas Phase ◽  
Phase Detection ◽  
Secondary Interactions

Newly developed instrumentation for measuring highly oxidized molecules at atmospheric pressure

2021 ◽  
Author(s):  
Paap Koemets ◽  
Sander Mirme ◽  
Kuno Kooser ◽  
Heikki Junninen
Keyword(s):  
Gas Phase ◽  
Atmospheric Chemistry ◽  
Atmospheric Pressure ◽  
Chemical Ionization ◽  
Measurement Technology ◽  
Differential Mobility Analyzer ◽  
Neutral Cluster ◽  
Differential Mobility ◽  
Alpha Pinene ◽  
Ambient Measurements

<p>The Highly Oxidized Molecule Ion Spectrometer (HOMIS) is a novel instrument for measuring the total concentration of highly oxidized molecules (HOM-s) (Bianchi et al., 2019) at atmospheric pressure. The device combines a chemical ionization charger with a multi-channel differential mobility analyzer. The chemical ionization charger is based on the principles outlined by Eisele and Tanner (1993). The charger is attached to a parallel differential mobility analyzer identical to the ones used in the Neutral cluster and Air Ion Spectrometer (NAIS, Mirme 2011), but with modified sample and sheath air flow rates to improve the mobility resolution of the device. The complete mobility distribution in the range from 3.2 to 0.056 cm<sup>2</sup>/V/s is measured simultaneously by 25 electrometers. The range captures the charger ions, monomers, dimers, trimers but also extends far towards larger particles to possibly detect larger HOM-s that have not been measured with existing instrumentation. The maximum time resolution of the device is 1 second allowing it to detect rapid changes in the sample. The device has been designed to be easy to use, require little maintenance and work reliably in various environments during long term measurements.</p><p>First results of the prototype were acquired from laboratory experiments and ambient measurements. Experiments were conducted at the Laboratory of Environmental Physics, University of Tartu. The sample was drawn from a reaction chamber where alpha-pinene and ozone were introduced. Initial results show a good response when concentrations of alpha-pinene and ozone were changed. </p><p>Ambient measurements were conducted at the SMEAR Estonia measurement station in a hemiboreal forest for 10 days in the spring and two months in the winter of 2020. The HOMIS measurements were performed together with a CI-APi-TOF (Jokinen et al., 2012).</p><p> </p><p>References:</p><p>Bianchi, F., Kurtén, T., Riva, M., Mohr, C., Rissanen, M. P., Roldin, P., Berndt, T., Crounse, J. D., Wennberg, P. O., Mentel, T. F., Wildt, J., Junninen, H., Jokinen, T., Kulmala, M., Worsnop, D. R., Thornton, J. A., Donahue, N., Kjaergaard, H. G. and Ehn, M. (2019), “Highly Oxygenated Organic Molecules (HOM) from Gas-Phase Autoxidation Involving Peroxy Radicals: A Key Contributor to Atmospheric Aerosol”, Chemical Reviews, 119, 6, 3472–3509</p><p>Eisele, F. L., Tanner D. J. (1993), “Measurement of the gas phase concentration of H2SO4 and methane sulfonic acid and estimates of H2SO4 production and loss in the atmosphere”, JGR: Atmospheres, 98, 9001-9010</p><p>Jokinen T., Sipilä M., Junninen H., Ehn M., Lönn G., Hakala J., Petäjä T., Mauldin III R. L., Kulmala M., and Worsnop D. R. (2012), “Atmospheric sulphuric acid and neutral cluster measurements using CI-APi-TOF”, Atmospheric Chemistry and Physics, 12, 4117–4125</p><p>Mirme, S. (2011), “Development of nanometer aerosol measurement technology”, Doctoral thesis, University of Tartu</p>

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