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Organic template-directed inorganic crystallization: Oriented nucleation of BaSO4 under compressed langmuir monolayers
journal contribution
posted on 2023-05-18, 14:17 authored by Heywood, BR, Mann, SLangmuir monolayers of n-eicosyl sulfate were shown to influence the nucleation of BaSO4 grown from supersaturated solutions (S = 30) at room temperature (293 K). Thin, elongated single crystalline plates were nucleated with the (100) face parallel to the plane of the monolayer. Partial matching of cation-cation distances with the interheadgroup spacings and stereochemical complementarity between the anionic motif and sulfate headgroups are potential factors responsible for oriented nucleation. The oriented crystals exhibited an unusual texture of coherently intergrown rhombic subunits which was attributable to monolayer-induced growth along specific lattice directions parallel to the monolayer/solution interface. By contrast, barium sulfate crystals nucleated under compressed eicosanoic acid monolayers were oriented along the [010] direction. These crystals were irregular in morphology, suggesting a kinetic rather than a structural influence of the organic template on nucleation at the monolayer/solution interface.
History
Publication title
Journal of the American Chemical SocietyVolume
114Issue
12Pagination
4681-4686ISSN
0002-7863Publisher
Amer Chemical SocPlace of publication
1155 16th St, NW, Washington, USA, Dc, 20036Rights statement
Copyright 1992 American Chemical SocietyRepository Status
- Restricted