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van Gestel J, van der Schoot P, Michels MA. Amplification of chirality in helical supramolecular polymers beyond the long-chain limit. J Chem Phys. 2004;120(17):8253-61doi: 10.1063/1.1689645.
van Gestel, J., van der Schoot, P., & Michels, M. A. (2004). Amplification of chirality in helical supramolecular polymers beyond the long-chain limit. The Journal of chemical physics, 120(17), 8253-61. https://doi.org/10.1063/1.1689645
van Gestel, Jeroen, et al. "Amplification of chirality in helical supramolecular polymers beyond the long-chain limit." The Journal of chemical physics vol. 120,17 (2004): 8253-61. doi: https://doi.org/10.1063/1.1689645
van Gestel J, van der Schoot P, Michels MA. Amplification of chirality in helical supramolecular polymers beyond the long-chain limit. J Chem Phys. 2004 May 01;120(17):8253-61. doi: 10.1063/1.1689645. PMID: 15267745.
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J Chem Phys. 2004 May 01;120(17):8253-61. doi: 10.1063/1.1689645.

Amplification of chirality in helical supramolecular polymers beyond the long-chain limit.

The Journal of chemical physics

Jeroen van Gestel, Paul van der Schoot, M A J Michels

Affiliations

  1. Polymer Physics Group, Department of Applied Physics and Dutch Polymer Institute, Technische Universiteit Eindhoven, P.O. Box 513, 5600 MB Eindhoven, The Netherlands. [email protected]

PMID: 15267745 DOI: 10.1063/1.1689645

Abstract

The optical activity of helical homopolymers devoid of chiral centers increases drastically when a small amount of homochiral monomers is incorporated into them. We study this so-called sergeants-and-soldiers effect of chirality amplification in solutions of helical supramolecular polymers with a theoretical model that bears a strong resemblance to a one-dimensional, two-component Ising model. In the limit of very long self-assembled helical polymers, the strength of the sergeants-and-soldiers effect depends strongly on the free energy of a helix reversal and less so on the concentration of aggregating material. Outside the long-chain limit, we find the reverse--that is, a strong concentration dependence and a weak dependence on the helix-reversal energy. Our treatment gives an excellent agreement with recently published circular-dichroism measurements on mixed aggregates of discotic molecules in the solvents water and n-butanol, at two different overall concentrations.

Copyright 2004 American Institute of Physics

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