A neutron scattering and modelling study of aqueous solutions of tetramethylammonium and tetrapropylammonium bromide
(2016) In Physical Chemistry Chemical Physics 18(16). p.11193-11201- Abstract
We have investigated the properties in water of two tetraalkylammonium bromides (tetramethylammonium, TMA+, and tetrapropylammonium, TPA+), at 0.4 M, using neutron scattering coupled with empirical potential structure refinement to arrive at an atomistic description. Having both a polar and an apolar moiety, it is of interest to determine the strength of each moiety as a function of the alkyl chain length. TMA+ and TPA+, having different impact as structure directors in zeolite synthesis, were chosen for this study. Water arranges tetrahedrally around TMA+ and in an almost featureless manner around TPA+. TMA+ and TPA+ show an apolar hydration with... (More)
We have investigated the properties in water of two tetraalkylammonium bromides (tetramethylammonium, TMA+, and tetrapropylammonium, TPA+), at 0.4 M, using neutron scattering coupled with empirical potential structure refinement to arrive at an atomistic description. Having both a polar and an apolar moiety, it is of interest to determine the strength of each moiety as a function of the alkyl chain length. TMA+ and TPA+, having different impact as structure directors in zeolite synthesis, were chosen for this study. Water arranges tetrahedrally around TMA+ and in an almost featureless manner around TPA+. TMA+ and TPA+ show an apolar hydration with TPA+ being slightly more apolar. TPA+ has a tendency to form small clusters of 2-4 molecules and to fold into a compact configuration. Both molecules correlate similarly with the bromide ion but do not dissociate completely at this concentration.
(Less)
- author
- Nilsson, Emelie J.
LU
; Alfredsson, Viveka
LU
; Bowron, Daniel T.
and Edler, Karen J.
LU
- organization
- publishing date
- 2016-04-28
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Chemistry Chemical Physics
- volume
- 18
- issue
- 16
- pages
- 9 pages
- publisher
- Royal Society of Chemistry
- external identifiers
-
- scopus:84967333745
- pmid:27051995
- wos:000374786300060
- ISSN
- 1463-9076
- DOI
- 10.1039/c6cp01389a
- language
- English
- LU publication?
- yes
- id
- ef2fa8cf-a605-4832-87b6-9c386b404920
- date added to LUP
- 2016-09-30 10:31:26
- date last changed
- 2025-01-12 12:22:38
@article{ef2fa8cf-a605-4832-87b6-9c386b404920, abstract = {{<p>We have investigated the properties in water of two tetraalkylammonium bromides (tetramethylammonium, TMA<sup>+</sup>, and tetrapropylammonium, TPA<sup>+</sup>), at 0.4 M, using neutron scattering coupled with empirical potential structure refinement to arrive at an atomistic description. Having both a polar and an apolar moiety, it is of interest to determine the strength of each moiety as a function of the alkyl chain length. TMA<sup>+</sup> and TPA<sup>+</sup>, having different impact as structure directors in zeolite synthesis, were chosen for this study. Water arranges tetrahedrally around TMA<sup>+</sup> and in an almost featureless manner around TPA<sup>+</sup>. TMA<sup>+</sup> and TPA<sup>+</sup> show an apolar hydration with TPA<sup>+</sup> being slightly more apolar. TPA<sup>+</sup> has a tendency to form small clusters of 2-4 molecules and to fold into a compact configuration. Both molecules correlate similarly with the bromide ion but do not dissociate completely at this concentration.</p>}}, author = {{Nilsson, Emelie J. and Alfredsson, Viveka and Bowron, Daniel T. and Edler, Karen J.}}, issn = {{1463-9076}}, language = {{eng}}, month = {{04}}, number = {{16}}, pages = {{11193--11201}}, publisher = {{Royal Society of Chemistry}}, series = {{Physical Chemistry Chemical Physics}}, title = {{A neutron scattering and modelling study of aqueous solutions of tetramethylammonium and tetrapropylammonium bromide}}, url = {{http://dx.doi.org/10.1039/c6cp01389a}}, doi = {{10.1039/c6cp01389a}}, volume = {{18}}, year = {{2016}}, }