Spectroscopic evidence for Davydov-like solitons in acetanilide

G. Careri, U. Buontempo, F. Galluzzi, A. C. Scott, E. Gratton, and E. Shyamsunder
Phys. Rev. B 30, 4689 – Published 15 October 1984
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Abstract

Detailed measurements of infrared absorption and Raman scattering on crystalline acetanilide [(CH3CONHC6H5)x] at low temperature show a new band close to the conventional amide I band. Equilibrium properties and spectroscopic data rule out explanations based on a conventional assignment, crystal defects, Fermi resonance, and upon frozen kinetics between two different subsystems. Thus we cannot account for this band using the concepts of conventional molecular spectroscopy, but a soliton model, similar to that proposed by Davydov for α-helix in protein, is in satisfactory agreement with the experimental data.

  • Received 2 April 1984

DOI:https://doi.org/10.1103/PhysRevB.30.4689

©1984 American Physical Society

Authors & Affiliations

G. Careri, U. Buontempo, and F. Galluzzi

  • Department of Physics, University of Rome, I-00185 Rome, Italy

A. C. Scott

  • Center for Nonlinear Studies, Los Alamos National Laboratory, Los Alamos, New Mexico 87545

E. Gratton and E. Shyamsunder

  • Department of Physics, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801

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Vol. 30, Iss. 8 — 15 October 1984

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