Ponomarenko, Ekaterina A. and Tirrell, David A. and MacKnight, William J. (1998) Water-Insoluble Complexes of Poly(L-Lysine) with Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures. Macromolecules, 31 (5). pp. 1584-1589. ISSN 0024-9297. doi:10.1021/ma971388u. https://resolver.caltech.edu/CaltechAUTHORS:PONm1998
Full text is not posted in this repository. Consult Related URLs below.
Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:PONm1998
Abstract
Structures of the water-insoluble complexes of poly(L-lysine) with octyl and octadedecyl sulfates, and with the mixtures of these surfactants, were examined via X-ray diffraction, infrared spectroscopy, and differential scanning calorimetry. The solid-state structures of the complexes were shown to be governed by their compositions. In the stoichiometric poly(L-lysine) complex with octadecyl sulfate, surfactant chains crystallize on a hexagonal lattice. In the poly(L-lysine)−octyl sulfate complex of nearly stoichiometric composition, the surfactants are arranged on an alkane-type two-dimensional lattice. In the complex with 20 mol % octadecyl sulfate and about 75 mol % octyl sulfate, the longer surfactant chains form hexagonal crystalline blocks, and the shorter chains are arranged on an alkane-type two-dimensional lattice. In the poly(l-lysine) complex with 10 mol % octadecyl sulfate and about 85 mol % octyl sulfate, all surfactant chains are arranged on a two-dimensional alkane-type lattice. All complexes are organized in lamellar structures consisting of layers of poly(L-lysine) chains in β-sheet conformations, separated by layers of surfactants. Complexes with crystalline and partially crystalline surfactants adopt lamellar structures with identical long periods and with interdigitated octadecyl chains. Complexes with two-dimensional order in the surfactant arrangement also adopt lamellar structures with identical long periods and with octyl chains packed tail to tail.
Item Type: | Article | |||||||||
---|---|---|---|---|---|---|---|---|---|---|
Related URLs: |
| |||||||||
ORCID: |
| |||||||||
Additional Information: | Copyright © 1998 American Chemical Society. Received September 19, 1997; Revised Manuscript Received January 2, 1998. Publication Date (Web): February 20, 1998. | |||||||||
Issue or Number: | 5 | |||||||||
DOI: | 10.1021/ma971388u | |||||||||
Record Number: | CaltechAUTHORS:PONm1998 | |||||||||
Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:PONm1998 | |||||||||
Official Citation: | Water-Insoluble Complexes of Poly(l-Lysine) with Mixed Alkyl Sulfates: Composition-Controlled Solid State Structures Ekaterina A. Ponomarenko, David A. Tirrell, and William J. MacKnight Macromolecules 1998 31 (5), 1584-1589 | |||||||||
Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
ID Code: | 53437 | |||||||||
Collection: | CaltechAUTHORS | |||||||||
Deposited By: | Anne Hormann | |||||||||
Deposited On: | 01 Feb 2015 04:41 | |||||||||
Last Modified: | 10 Nov 2021 20:02 |
Repository Staff Only: item control page