TY - GEN A1 - Blum, M. A1 - Odelius, Michael A1 - Weinhardt, Lothar A1 - Pookpanratana, Sujitra A1 - Bär, Marcus A1 - Zhang, Y. A1 - Fuchs, Oliver A1 - Yang, W. A1 - Umbach, Eberhard A1 - Heske, Clemens T1 - Ultrafast Proton Dynamics in Aqueous Amino Acid Solutions Studied by Resonant Inelastic Soft X‑ray Scattering T2 - The Journal of physical chemistry : B N2 - Resonant inelastic soft X-ray scattering (RIXS) has been used to study the electronic structure of glycine and lysine in aqueous solution. Upon variation of the pH value of the solution from acidic to basic, major changes of the nitrogen K edge RIXS data are observed for both amino acids, which are associated with the protonation and deprotonation of the amino groups. The experimental results are compared with simulations based on density functional theory, yielding a detailed understanding of the spectral changes, as well as insights into the ultrafast proton dynamics in the intermediate core-excited/ionized state of the RIXS process. Y1 - 2012 SN - 1520-5207 VL - 116 IS - 46 SP - 13757 EP - 13764 ER -