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Title: X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions

Abstract

Here, we report the results of X-ray scattering, physical, and spectroscopic measurements on a series of water-saturated trialkylamine/carboxylic acid mixtures. The results demonstrate the existence of well-defined nanoscale structures in bulk liquid mixtures at specific acid : amine ratios. These structures are analogous to those observed in ionic liquids but are driven by the formation of a hydrogen-bonded network rather than via inter-ion Coulomb forces. The results of the physical components of this study are closely analogous to prior observations on anhydrous, low molecular weight acid/amine mixtures, but this is to our knowledge the first time these observations have been augmented by the use of X-ray scattering. The results therefore bridge the gap between early work on amine/acid mixtures and recent studies of protic and pseudoprotic ionic liquids.

Authors:
ORCiD logo [1]; ORCiD logo [2]
  1. Brooklyn College of City Univ. (CUNY), Brooklyn, NY (United States). Dept. of Chemistry; City Univ. (CUNY), NY (United States). Graduate Center and Dept. of Chemistry
  2. Brookhaven National Lab. (BNL), Upton, NY (United States). Center for Functional Nanomaterials (CFN)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Scientific User Facilities Division; Netherlands Organisation for Scientific Research (NWO)
OSTI Identifier:
1476293
Report Number(s):
BNL-209128-2018-JAAM
Journal ID: ISSN 1463-9076; PPCPFQ
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Physical Chemistry Chemical Physics. PCCP (Print)
Additional Journal Information:
Journal Name: Physical Chemistry Chemical Physics. PCCP (Print); Journal Volume: 20; Journal Issue: 27; Journal ID: ISSN 1463-9076
Publisher:
Royal Society of Chemistry
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; ionic liquid

Citation Formats

Kobrak, Mark N., and Yager, Kevin G. X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions. United States: N. p., 2018. Web. doi:10.1039/C8CP02854K.
Kobrak, Mark N., & Yager, Kevin G. X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions. United States. doi:10.1039/C8CP02854K.
Kobrak, Mark N., and Yager, Kevin G. Mon . "X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions". United States. doi:10.1039/C8CP02854K. https://www.osti.gov/servlets/purl/1476293.
@article{osti_1476293,
title = {X-Ray scattering and physicochemical studies of trialkylamine/carboxylic acid mixtures: nanoscale structure in pseudoprotic ionic liquids and related solutions},
author = {Kobrak, Mark N. and Yager, Kevin G.},
abstractNote = {Here, we report the results of X-ray scattering, physical, and spectroscopic measurements on a series of water-saturated trialkylamine/carboxylic acid mixtures. The results demonstrate the existence of well-defined nanoscale structures in bulk liquid mixtures at specific acid : amine ratios. These structures are analogous to those observed in ionic liquids but are driven by the formation of a hydrogen-bonded network rather than via inter-ion Coulomb forces. The results of the physical components of this study are closely analogous to prior observations on anhydrous, low molecular weight acid/amine mixtures, but this is to our knowledge the first time these observations have been augmented by the use of X-ray scattering. The results therefore bridge the gap between early work on amine/acid mixtures and recent studies of protic and pseudoprotic ionic liquids.},
doi = {10.1039/C8CP02854K},
journal = {Physical Chemistry Chemical Physics. PCCP (Print)},
number = 27,
volume = 20,
place = {United States},
year = {2018},
month = {6}
}

Journal Article:
Free Publicly Available Full Text
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Figures / Tables:

Table 1 Table 1: Trialkylamine and Carboxylic Acid Mixtures Used in the Present Study.

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    Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.