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Main Title: Combined influence of ectoine and salt: spectroscopic and numerical evidence for compensating effects on aqueous solutions
Author(s): Hahn, Marc Benjamin
Uhlig, Frank
Solomun, Tihomir
Smiatek, Jens
Sturm, Heinz
Type: Article
Language Code: en
Abstract: Ectoine is an important osmolyte, which allows microorganisms to survive in extreme environmental salinity. The hygroscopic effects of ectoine in pure water can be explained by a strong water binding behavior whereas a study on the effects of ectoine in salty solution is yet missing. We provide Raman spectroscopic evidence that the influence of ectoine and NaCl are opposing and completely independent of each other. The effect can be explained by the formation of strongly hydrogen-bonded water molecules around ectoine which compensate the influence of the salt on the water dynamics. The mechanism is corroborated by first principles calculations and broadens our understanding of zwitterionic osmolytes in aqueous solution. Our findings allow us to provide a possible explanation for the relatively high osmolyte concentrations in halotolerant bacteria.
Issue Date: 2016
Date Available: 24-Oct-2017
DDC Class: 540 Chemie und zugeordnete Wissenschaften
Sponsor/Funder: DFG, EXC 310, Simulationstechnik
DFG, SFB 716, Dynamische Simulation von Systemen mit großen Teilchenzahlen
Journal Title: Physical chemistry, chemical physics
Publisher: Royal Society of Chemistry
Publisher Place: Cambridge
Volume: 18
Issue: 41
Publisher DOI: 10.1039/c6cp05417j
Page Start: 28398
Page End: 28402
EISSN: 1463-9084
ISSN: 1463-9076
Appears in Collections:Inst. Werkzeugmaschinen und Fabrikbetrieb » Publications

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