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Structure and Properties of Stoichiometric Complexes Formed by Sodium Poly(α,L-glutamate) and Oppositely Charged Surfactants

Ponomarenko, Ekaterina A. and Waddon, Alan J. and Tirrell, David A. and MacKnight, William J. (1996) Structure and Properties of Stoichiometric Complexes Formed by Sodium Poly(α,L-glutamate) and Oppositely Charged Surfactants. Langmuir, 12 (9). pp. 2169-2172. ISSN 0743-7463. doi:10.1021/la951012e. https://resolver.caltech.edu/CaltechAUTHORS:PONl1996

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Abstract

The conformational and structural properties of the stoichiometric complexes formed by poly(α,L-glutamate) anions and alkyltrimethylammonium cations with chain lengths of twelve, sixteen, and eighteen carbon atoms were examined by circular dichroism, infrared, differential scanning calorimetry, and X-ray diffraction techniques. The polypeptide chains complexed with the surfactants adopt α-helical conformations. The shorter surfactant alkyl chains, consisting of twelve and sixteen carbon atoms, are disordered in the complexes, while the longer surfactant chains of eighteen carbon atoms crystallize on a hexagonal lattice. All of the complexes are organized in lamellar structures consisting of alternating layers of poly(α,L-glutamate) chains separated by bimolecular layers of the surfactants. The surfactant alkyl chains are interdigitated and perpendicular to the lamellar surfaces.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1021/la951012eDOIArticle
http://pubs.acs.org/doi/abs/10.1021/la951012ePublisherArticle
ORCID:
AuthorORCID
Tirrell, David A.0000-0003-3175-4596
Additional Information:Copyright © 1996 American Chemical Society. Received November 7, 1995. In Final Form: January 31, 1996. Publication Date (Web): May 1, 1996. Abstract published in Advance ACS Abstracts, April 15, 1996. This work was supported by a grant from the National Science Foundation (DMR 9311658) and by the NSF Materials Science and Engineering Center at the University of Massachusetts.
Funders:
Funding AgencyGrant Number
NSFDMR 9311658
Issue or Number:9
DOI:10.1021/la951012e
Record Number:CaltechAUTHORS:PONl1996
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:PONl1996
Official Citation:Structure and Properties of Stoichiometric Complexes Formed by Sodium Poly(α,L-glutamate) and Oppositely Charged Surfactants Ekaterina A. Ponomarenko, Alan J. Waddon, David A. Tirrell, and William J. MacKnight Langmuir 1996 12 (9), 2169-2172
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:53467
Collection:CaltechAUTHORS
Deposited By: Anne Hormann
Deposited On:29 Jan 2015 22:36
Last Modified:10 Nov 2021 20:02

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