| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Toivonen, Juha
Tampere University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2022Maskless fabrication of plasmonic metasurfaces in polymer film using a spatial light modulatorcitations
- 2021Maskless fabrication of plasmonic metasurfaces in polymer film using a spatial light modulatorcitations
- 2021In-situ monitoring of transient gas phase K-Cl-S chemistry in a pilot-scale combustorcitations
- 2021Light-patterned fluorescent gold nanoclusters in polycarbonate filmscitations
- 2020Sequential Collinear Photofragmentation and Atomic Absorption Spectroscopy for Online Laser Monitoring of Triatomic Metal Speciescitations
- 2020Sub-microwatt direct laser writing of fluorescent gold nanoclusters in polymer filmscitations
- 2020Analysis of ilmenite slag using laser-induced breakdown spectroscopycitations
- 2016Holographic patterning of fluorescent microstructures comprising silver nanoclusterscitations
- 2016Micropatterning of silver nanoclusters embedded in polyvinyl alcohol filmscitations
- 2016Sub-micron scale patterning of fluorescent silver nanoclusters using low-power lasercitations
- 2015Direct Laser Writing of Fluorescent Silver Nanoclusters in Polyvinyl Alcohol Films
- 2015Rate constant and thermochemistry for K + O2 + N2 = KO2 + N2citations
- 2015Rate constant and thermochemistry for K + O 2 + N 2 = KO 2 + N 2citations
- 2014Direct laser writing of photostable fluorescent silver nanoclusters in polymer filmscitations
- 2003Growth and properties of GaAsN structures
Places of action
| Organizations | Location | People |
|---|
article
Rate constant and thermochemistry for K + O2 + N2 = KO2 + N2
Abstract
The addition reaction of potassium atoms with oxygen has been studied using the collinear photofragmentation and atomic absorption spectroscopy (CPFAAS) method. KCl vapor was photolyzed with 266 nm pulses and the absorbance by K atoms at 766.5 nm was measured at various delay times with a narrow line width diode laser. Experiments were carried out with O<sub>2</sub>/N<sub>2</sub> mixtures at a total pressure of 1 bar, over 748-1323 K. At the lower temperatures single exponential decays of [K] yielded the third-order rate constant for addition,<i> k</i><sub>R1</sub>, whereas at higher temperatures equilibration was observed in the form of double exponential decays of [K], which yielded both <i>k</i><sub>R1</sub> and the equilibrium constant for KO<sub>2</sub> formation. <i>k</i><sub>R1</sub> can be summarized as 1.07 × 10<sup>-30</sup>(<i>T</i>/1000 K)<sup>-0.733</sup> cm<sup>6</sup> molecule<sup>-2</sup> s<sup>-1</sup>. Combination with literature values leads to a recommended <i>k</i><sub>R1</sub> of 5.5 × 10<sup>-26</sup><i>T</i><sup>-1.55</sup> exp(-10/<i>T</i>) cm<sup>6</sup> molecule<sup>-2</sup> s<sup>-1</sup> over 250-1320 K, with an error limit of a factor of 1.5. A vant Hoff analysis constrained to fit the computed ΔS<sub>298</sub> yields a K-O2 bond dissociation enthalpy of 184.2 ± 4.0 kJ mol<sup>-1</sup> at 298 K and Δ<sub>f</sub><i>H</i><sub>298</sub>(KO<sub>2</sub>) = -95.2 ± 4.1 kJ mol<sup>-1</sup>. The corresponding D<sub><i>0</i></sub> is 181.5 ± 4.0 kJ mol<sup>-1</sup>. This value compares well with a CCSD(T) extrapolation to the complete basis set limit, with all electrons correlated, of 177.9 kJ mol<sup>-1</sup>.