On the Origin of the Hydrogen-Bond-Network Nature of Water : X-Ray Absorption and Emission Spectra of Water-Acetonitrile Mixtures

• A liquid microjet was used to obtain oxygen K-edge X-ray absorption and emission spectra of water–acetonitrile mixtures of various compositions. The observed spectral changes are unambiguously related to the increasing number of broken hydrogen bonds with decreasing water concentration, and the hydrogen-bond network of liquid water can thus be addressed on purely experimental grounds without the need for theoretical modeling.

Nyckelord

hydrogen bonds

water

water chemistry

X-ray absorption spectroscopy

X-ray emission spectroscopy

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