In situ ATR-IR spectroscopy: a powerful tool to elucidate the catalytic oxidation of veratryl alcohol in aqueous media

2003 ◽  
Vol 5 (20) ◽  
pp. 4450-4454 ◽  
Author(s):  
Kaisa Kervinen ◽  
Markus Allmendinger ◽  
Markku Leskelä ◽  
Timo Repo ◽  
Bernhard Rieger
Keyword(s):  
Ir Spectroscopy ◽  
Catalytic Oxidation ◽  
Aqueous Media ◽  
Veratryl Alcohol

Syntheses and Characterisation of Gd3Al5O12 and La3Al5O12 Garnets

2007 ◽  
Vol 72 (3) ◽  
pp. 321-333 ◽  
Author(s):  
Edita Garskaite ◽  
Natalija Dubnikova ◽  
Arturas Katelnikovas ◽  
Jiří Pinkas ◽  
Aivaras Kareiva
Keyword(s):  
Phase Composition ◽  
Ir Spectroscopy ◽  
Metal Ions ◽  
Sol Gel ◽  
Aqueous Media ◽  
Experimental Conditions ◽  
Lanthanide Ion ◽  
In Situ Generation ◽  
Xrd Patterns

A sol-gel method based on in situ generation of mixed-metal chelates by complexing metal ions with ethane-1,2-diol in aqueous media has been elaborated to prepare lanthanide-ion containing garnets, Gd3Al5O12 (GAG) and La3Al5O12 (LAG). XRD patterns of the powders sintered at 1 000 °C revealed the formation of monophasic GAG. However, LAG does not form under the same experimental conditions. The phase composition of the samples was characterised by IR spectroscopy. Microstructural features of the polycrystalline garnets were studied by SEM.

On In Situ Prepared Cu–Phenanthroline Complexes in Aqueous Alkaline Solutions and Their Use in the Catalytic Oxidation of Veratryl Alcohol

2007 ◽  
Vol 2007 (17) ◽  
pp. 2465-2471 ◽  
Author(s):  
Heikki Korpi ◽  
Paweł J. Figiel ◽  
Elina Lankinen ◽  
Paul Ryan ◽  
Markku Leskelä ◽  
...  
Keyword(s):  
Catalytic Oxidation ◽  
Veratryl Alcohol ◽  
Alkaline Solutions

Mechanistic Insights into the Oxidation of Veratryl Alcohol with Co(salen) and Oxygen in Aqueous Media: An in-situ Spectroscopic Study (Eur. J. Inorg. Chem. 13/2005)

2005 ◽  
Vol 2005 (13) ◽  
pp. 2561-2561
Author(s):  
Kaisa Kervinen ◽  
Heikki Korpi ◽  
J. Gerbrand Mesu ◽  
Fouad Soulimani ◽  
Timo Repo ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Aqueous Media ◽  
Veratryl Alcohol

scholarly journals Mechanistic Insights into the Oxidation of Veratryl Alcohol with Co(salen) and Oxygen in Aqueous Media: An in-situ Spectroscopic Study

2005 ◽  
Vol 2005 (13) ◽  
pp. 2591-2599 ◽  
Author(s):  
Kaisa Kervinen ◽  
Heikki Korpi ◽  
J. Gerbrand Mesu ◽  
Fouad Soulimani ◽  
Timo Repo ◽  
...  
Keyword(s):  
Spectroscopic Study ◽  
Aqueous Media ◽  
Veratryl Alcohol

The Nature of Chemisorbed CO2 in Zeolite A

2019 ◽  
Author(s):  
Przemyslaw Rzepka ◽  
Zoltán Bacsik ◽  
Andrew J. Pell ◽  
Niklas Hedin ◽  
Aleksander Jaworski
Keyword(s):  
Solid State ◽  
Ir Spectroscopy ◽  
Quantum Chemical Calculations ◽  
Quantum Chemical ◽  
Surface Coverage ◽  
Gas Mixtures ◽  
Mas Nmr ◽  
Significant Fraction ◽  
Zeolite A

Formation of CO<sub>3</sub><sup>2-</sup> and HCO<sub>3</sub><sup>-</sup> species without participation of the framework oxygen atoms upon chemisorption of CO<sub>2</sub> in zeolite |Na<sub>12</sub>|-A is revealed. The transfer of O and H atoms is very likely to have proceeded via the involvement of residual H<sub>2</sub>O or acid groups. A combined study by solid-state <sup>13</sup>C MAS NMR, quantum chemical calculations, and <i>in situ</i> IR spectroscopy showed that the chemisorption mainly occurred by the formation of HCO<sub>3</sub><sup>-</sup>. However, at a low surface coverage of physisorbed and acidic CO<sub>2</sub>, a significant fraction of the HCO<sub>3</sub><sup>-</sup> was deprotonated and transformed into CO<sub>3</sub><sup>2-</sup>. We expect that similar chemisorption of CO<sub>2</sub> would occur for low-silica zeolites and other basic silicates of interest for the capture of CO<sub>2</sub> from gas mixtures.

Catalytic activity of rhodium(I) complexes containing (ω-trimethylsilylalkyl)diphenylphosphines

1980 ◽  
Vol 45 (8) ◽  
pp. 2219-2223 ◽  
Author(s):  
Marie Jakoubková ◽  
Martin Čapka
Keyword(s):  
Catalytic Activity ◽  
Nmr Spectroscopy ◽  
Ir Spectroscopy ◽  
Electron Density ◽  
Phosphorus Atom ◽  
Proton Acceptor ◽  
Trimethylsilyl Group ◽  
Kinetics Of

Kinetics of homogenous hydrogenation of 1-heptene catalysed by rhodium(I) complexes prepared in situ from μ,μ'-dichloro-bis(cyclooctenerhodium) and phosphines of the type RP(C6H5)2 (R = -CH3, -(CH2)nSi(CH3)3; n = 1-4) have been studied. The substitution of the ligands by the trimethylsilyl group was found to increase significantly the catalytic activity of the complexes. The results are discussed in relation to the electron density on the phosphorus atom determined by 31P NMR spectroscopy and to its proton acceptor ability determined by IR spectroscopy.

Roughened gold electrode for in situ SERS analysis of structural changes accompanying the doping process of polyaniline in acidic aqueous media

2021 ◽  
Vol 882 ◽  
pp. 115034
Author(s):  
A. El Guerraf ◽  
M. Bouabdallaoui ◽  
Z. Aouzal ◽  
S. Ben Jadi ◽  
N.K. Bakirhan ◽  
...  
Keyword(s):  
Gold Electrode ◽  
Structural Changes ◽  
Aqueous Media

In Situ IR Spectroscopy for Following the Copolymerization of CO2and Epoxides

2014 ◽  
Vol 86 (9) ◽  
pp. 1627-1628
Author(s):  
K. Böhm ◽  
W. Leitner ◽  
T. E. Müller
Keyword(s):  
Ir Spectroscopy ◽  
In Situ Ir ◽  
In Situ Ir Spectroscopy
Sign in / Sign up

Export Citation Format

Share Document