scholarly journals Laboratory EXAFS determined structure of the stable complexes in the ternary Ni(ii)–EDTA–CN− system

2019 ◽  
Vol 21 (18) ◽  
pp. 9239-9245 ◽  
Author(s):  
Zoltán Németh ◽  
Éva G. Bajnóczi ◽  
Bogdán Csilla ◽  
György Vankó
Keyword(s):  
Ternary System ◽  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
Cyanide Concentration ◽  
X Ray ◽  
System P ◽  
X Ray Absorption

Aqueous solutions of the ternary system Ni(ii)–EDTA–CN− are investigated with X-ray Absorption Spectroscopy (XAS) as a function of cyanide concentration with an enhanced laboratory von Hámos X-ray spectrometer.

A different view of structure-making and structure-breaking in alkali halide aqueous solutions through x-ray absorption spectroscopy

2014 ◽  
Vol 140 (24) ◽  
pp. 244506 ◽  
Author(s):  
Iradwikanari Waluyo ◽  
Dennis Nordlund ◽  
Uwe Bergmann ◽  
Daniel Schlesinger ◽  
Lars G. M. Pettersson ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
Alkali Halide ◽  
X Ray ◽  
X Ray Absorption ◽  
Structure Breaking

Soft X-ray Absorption Spectroscopy of Aqueous Solutions Using a Table-Top Femtosecond Soft X-ray Source

2018 ◽  
Vol 10 (1) ◽  
pp. 52-58 ◽  
Author(s):  
Carlo Kleine ◽  
Maria Ekimova ◽  
Gildas Goldsztejn ◽  
Sebastian Raabe ◽  
Christian Strüber ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
X Ray ◽  
X Ray Absorption

X-ray Absorption Spectroscopy Study of the Hydrogen Bond Network in the Bulk Water of Aqueous Solutions

2005 ◽  
Vol 109 (27) ◽  
pp. 5995-6002 ◽  
Author(s):  
Lars-Åke Näslund ◽  
David C. Edwards ◽  
Philippe Wernet ◽  
Uwe Bergmann ◽  
Hirohito Ogasawara ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
Bulk Water ◽  
Hydrogen Bond Network ◽  
Spectroscopy Study ◽  
X Ray ◽  
Bond Network ◽  
X Ray Absorption

scholarly journals Aqueous-phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy

2021 ◽  
Vol 21 (4) ◽  
pp. 2881-2894
Author(s):  
Georgia Michailoudi ◽  
Jack J. Lin ◽  
Hayato Yuzawa ◽  
Masanari Nagasaka ◽  
Marko Huttula ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
Atmospheric Chemistry ◽  
Aldol Condensation ◽  
Cloud Formation ◽  
Aqueous Environment ◽  
Aerosol Formation ◽  
X Ray ◽  
Dilute Aqueous Solutions ◽  
X Ray Absorption

Abstract. Glyoxal (CHOCHO) and methylglyoxal (CH3C(O)CHO) are well-known components of atmospheric particles and their properties can impact atmospheric chemistry and cloud formation. To get information on their hydration states in aqueous solutions and how they are affected by the addition of inorganic salts (sodium chloride (NaCl) and sodium sulfate (Na2SO4)), we applied carbon and oxygen K-edge X-ray absorption spectroscopy (XAS) in transmission mode. The recorded C K-edge spectra show that glyoxal is completely hydrated in the dilute aqueous solutions, in line with previous studies. For methylglyoxal, supported by quantum chemical calculations we identified not only C–H, C=O and C–OH bonds, but also fingerprints of C–OH(CH2) and C=C bonds. The relatively low intensity of C=O transitions implies that the monohydrated form of methylglyoxal is not favored in the solutions. Instead, the spectral intensity is stronger in regions where products of aldol condensation and enol tautomers of the monohydrates contribute. The addition of salts was found to introduce only very minor changes to absorption energies and relative intensities of the observed absorption features, indicating that XAS in the near-edge region is not very sensitive to these intermolecular organic–inorganic interactions at the studied concentrations. The identified structures of glyoxal and methylglyoxal in an aqueous environment support the uptake of these compounds to the aerosol phase in the presence of water and their contribution to secondary organic aerosol formation.

scholarly journals Aqueous phase behavior of glyoxal and methylglyoxal observed with carbon and oxygen K-edge X-ray absorption spectroscopy

2020 ◽  
Author(s):  
Georgia Michailoudi ◽  
Jack J. Lin ◽  
Hayato Yuzawa ◽  
Masanari Nagasaka ◽  
Marko Huttula ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Absorption Spectroscopy ◽  
Atmospheric Chemistry ◽  
Aldol Condensation ◽  
Cloud Formation ◽  
Aqueous Environment ◽  
Aerosol Formation ◽  
X Ray ◽  
Dilute Aqueous Solutions ◽  
X Ray Absorption

Abstract. Glyoxal (CHOCHO) and methylglyoxal (CH3C(O)CHO) are well-known components of atmospheric particles and their properties can impact atmospheric chemistry and cloud formation. To get information on their hydration states in aqueous solutions and how they are affected by addition of inorganic salts (sodium chloride (NaCl) and sodium sulfate (Na2SO4)), we applied carbon and oxygen K-edge X-ray absorption spectroscopy (XAS) in transmission mode. The recorded C K-edge spectra show that glyoxal is completely hydrated in the dilute aqueous solutions, in line with previous studies. For methylglyoxal, we identified, supported by quantum chemical calculations, not only C-H, C=O and C-OH bonds, but also fingerprints of C-OH(CH2) and C=C bonds. This implies the presence of both mono- and dihydrated forms of methylglyoxal, as well as products of aldol condensation, and enol tautomers of the monohydrates. The addition of salts was found to introduce only very minor changes to absorption energies and relative intensities of the observed absorption features, indicating that the organic-inorganic interactions at the studied concentrations are not strong enough to affect the spectra in this work. The identified structures of glyoxal and methylglyoxal in aqueous environment support the uptake of these compounds to the aerosol phase in the presence of water and their contribution on secondary organic aerosol formation.

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