Titlebar

Export bibliographic data
Literature by the same author
plus on the publication server
plus at Google Scholar

 

Microphase separation upon crystallization of small amphiphilic molecules : 'low' temperature form II of sodium benzoate (E 211)

Title data

Martin, Thomas ; Gorelik, Tatiana ; Greim, Dominik ; Butterhof, Christian ; Kolb, Ute ; Senker, Jürgen ; Breu, Josef:
Microphase separation upon crystallization of small amphiphilic molecules : 'low' temperature form II of sodium benzoate (E 211).
In: CrystEngComm. Vol. 18 (2016) Issue 31 . - pp. 5811-5817.
ISSN 1466-8033
DOI: https://doi.org/10.1039/C6CE01281G

Project information

Project financing: SPP 1415

Abstract in another language

A so far unknown low temperature polymorph (form II crystallized at 350 [degree]C) of the common food preservative sodium benzoate (NaBz; E 211) could be crystallized by annealing (7 days) of the poorly crystalline technical material. Its crystal structure was solved by indexing a tiny single crystal by electron diffraction followed by structure solution and refinement applying powder X-ray diffraction (PXRD). The new polymorph shows many structural similarities to form I (crystallized at 420 [degree]C). Both form I and II are the result of a microphase separation: the structures consist of pseudo-hexagonal packings of rod-shaped micelles where the core consists of sodium cations being coordinated by the carboxylic groups, while the phenyl moieties of benzoate point outwards rendering the micelle surface hydrophobic. The structures differ by the degree of elliptical distortion of the rods which is more pronounced for the new form II due to incorporation of an additional Na-benzoate moiety into the circumference of the rods.

Further data

Item Type: Article in a journal
Refereed: Yes
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I > Chair Anorganic Chemistry I - Univ.-Prof. Dr. Josef Breu
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III > Chair Anorganic Chemistry III - Univ.-Prof. Dr. Jürgen Senker
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry I
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Anorganic Chemistry III
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 17 Oct 2016 12:17
Last Modified: 01 Feb 2018 08:40
URI: https://eref.uni-bayreuth.de/id/eprint/34949