Stability and IR Spectroscopy of Zwitterionic Form of β-Alanine in Water Clusters

2019 ◽  
Author(s):  
Reyhaneh Ghassemizadeh ◽  
Brendan Moore ◽  
Takamasa Momose ◽  
Michael Walter
Keyword(s):  
Ir Spectroscopy ◽  
Water Clusters ◽  
Zwitterionic Form

scholarly journals Acid solvation versus dissociation at “stardust conditions”: Reaction sequence matters

2019 ◽  
Vol 5 (6) ◽  
pp. eaav8179 ◽  
Author(s):  
Devendra Mani ◽  
Ricardo Pérez de Tudela ◽  
Raffael Schwan ◽  
Nitish Pal ◽  
Saskia Körning ◽  
...  
Keyword(s):  
Molecular Evolution ◽  
Ir Spectroscopy ◽  
Theoretical Study ◽  
Water Clusters ◽  
Acid Dissociation ◽  
Reaction Sequence ◽  
Helium Nanodroplets ◽  
Interstellar Clouds ◽  
Ab Initio Simulations ◽  
Reaction Stoichiometry

Chemical reactions at ultralow temperatures are of fundamental importance to primordial molecular evolution as it occurs on icy mantles of dust nanoparticles or on ultracold water clusters in dense interstellar clouds. As we show, studying reactions in a stepwise manner in ultracold helium nanodroplets by mass-selective infrared (IR) spectroscopy provides an avenue to mimic these “stardust conditions” in the laboratory. In our joint experimental/theoretical study, in which we successively add H2O molecules to HCl, we disclose a unique IR fingerprint at 1337 cm−1 that heralds hydronium (H3O+) formation and, thus, acid dissociation generating solvated protons. In stark contrast, no reaction is observed when reversing the sequence by allowing HCl to interact with preformed small embryonic ice-like clusters. Our ab initio simulations demonstrate that not only reaction stoichiometry but also the reaction sequence needs to be explicitly considered to rationalize ultracold chemistry.

IR SPECTROSCOPY OF GLYCINE-WATER CLUSTERS IN HELIUM NANODROPLETS

2019 ◽  
Author(s):  
Nitish Pal ◽  
Martina Havenith ◽  
Lex van der Meer ◽  
Britta Redlich ◽  
Gerhard Schwaab ◽  
...  
Keyword(s):  
Ir Spectroscopy ◽  
Water Clusters ◽  
Helium Nanodroplets

IR spectroscopy of 2-fluoropyridine–water clusters in the electronic excited states

2007 ◽  
Vol 442 (1-3) ◽  
pp. 7-11 ◽  
Author(s):  
Yoshinori Nibu ◽  
Ryosuke Marui ◽  
Hiroko Shimada
Keyword(s):  
Ir Spectroscopy ◽  
Excited States ◽  
Water Clusters ◽  
Electronic Excited States

IR SPECTROSCOPY WITH SURFACE ELECTROMAGNETIC WAVES

1984 ◽  
Vol 45 (C5) ◽  
pp. C5-167-C5-178
Author(s):  
A. J. Sievers ◽  
Z. Schlesinger ◽  
Y. J. Chabal
Keyword(s):  
Ir Spectroscopy ◽  
Electromagnetic Waves ◽  
Surface Electromagnetic Waves
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