The absorption and rotation of light is derived for a free electron constrained to move on a helix. This model is probably the simplest optically active system for which exact wavefunctions can be obtained. It is found that a randomly oriented right‐handed helix has a positive rotational strength for the longest wavelength absorption band. As expected, this free electron model gives results very similar to an exciton model in which only nearest‐neighbor interactions are considered.
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Research Article| June 29 2004
Optical Rotation of Oriented Helices. IV. A Free Electron on a Helix
Ignacio Tinoco, Jr.;
Ignacio Tinoco, Robert W. Woody; Optical Rotation of Oriented Helices. IV. A Free Electron on a Helix. J. Chem. Phys. 1 January 1964; 40 (1): 160–165. https://doi.org/10.1063/1.1724854
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