DMSO-Water Clustering in Solution Observed in Soft X-ray Spectra.
The significant deviation from the ideality of dimethyl sulfoxide (DMSO)/water mixtures can be addressed based on the change of the local molecular orbitals of each solvent upon mixing. Oxygen K-edge absorption and emission spectra of DMSO/water solutions were measured using the liquid microjet technique. The spectra demonstrate that the hydrogen bond network in liquid water is already influenced at small DMSO concentrations, and at the molar fraction xDMSO = 0.43 we find strong evidence of DMSO-water clustering reflected by the influence on the occupied molecular orbitals.
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Nicholas
N
Engel
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Kaan
K
Atak
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Kathrin M
KM
Lange
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Malte
M
Gotz
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.|§Research Center for Nanoscale Structure of Matter, Southern Federal University, Sorge 5, Rostov-na-Donu 344090, Russia.
Mikhail
M
Soldatov
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Ronny
R
Golnak
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Edlira
E
Suljoti
∥Department of Physics and Astronomy, Uppsala University, Box 516, S-751 20 Uppsala, Sweden.
Jan-Erik
JE
Rubensson
†Joint Ultrafast Dynamics Lab in Solutions and at Interfaces (JULiq) at Helmholtz-Zentrum Berlin für Materialien und Energie, Albert-Einstein-Strasse 15, 12489 Berlin, Germany.|‡Freie Universität Berlin, FB Physik, Arnimallee 14, 14195 Berlin, Germany.
Emad F
EF
Aziz
X-ray absorption spectroscopy; X-ray emission spectroscopy; bond strength; hydrogen bond network; liquid microjet; molecular interaction; nonideality of mixing