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Complex Formation in Aqueous Trimethylamine-N-oxide (TMAO) Solutions

Hunger, J. ; Tielrooij, K.-J. ; Buchner, Richard ; Bonn, M. ; Bakker, H.


We study aq. solns. of the amphiphilic osmolyte trimethylamine-N-oxide (TMAO) using broadband dielec. spectroscopy and femtosecond mid-IR spectroscopy. Both expts. provide strong evidence for distinctively slower rotation dynamics for water mols. interacting with the hydrophobic part of the TMAO mols. Further, water is found to interact more strongly at the hydrophilic site of the TMAO mols.: ...


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