A planar–nonplanar conformational transition in conjugated polymer solutions
Authors:
- 1 May 1979
- journal article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 70 (9) , 4387-4392
Abstract
Solutions of certain urethane substituted polydiacetylenes undergo dramatic, reversible color changes on addition of a nonsolvent. In some cases, the lowest energy optical transition of the polymer shifts by more than 5000 cm−1 (21 300 cm−1 to 15 900 cm−1 when the nonsolvent is added). The color changes are shown to be due to a planar–nonplanar conformational transition of the polymer backbone. The planar, fully-conjugated conformation is stabilized by intramolecular hydrogen bonding between urethane functionalities on adjacent substituent groups.Keywords
This publication has 22 references indexed in Scilit:
- A visual conformational transition in a polymer solutionJournal of Polymer Science Part C: Polymer Letters, 1978
- Energetics and mechanism of the solid-state polymerization of diacetylenesJournal of the American Chemical Society, 1978
- Solid‐state polymerization of a diacetylene crystal: Thermal, ultraviolet, and γ‐ray polymerization of 2,4‐hexadiyne‐1,6‐diol bis‐(p‐toluene sulfonate)Journal of Polymer Science: Polymer Physics Edition, 1978
- An examination of the thermal polymerization of a crystalline diacetylene using diffuse reflectance spectroscopyJournal of the American Chemical Society, 1977
- Electronic structure change at a phase transition in a polydiacetylene crystalThe Journal of Chemical Physics, 1977
- Comments on the optical properties of fully conjugated polymers: Analogy between polyenes and polydiacetylenesJournal of Polymer Science: Polymer Physics Edition, 1976
- Point defects in fully conjugated polymersJournal of Applied Physics, 1976
- Resonance Raman study of the thermochromic phase transition of a polydiacetyleneJournal of the American Chemical Society, 1976
- Sense of the Helix in Poly-L-tyrosineNature, 1962
- The Intensities of Carbonyl Bands in the Infrared Spectra of Steroids1Journal of the American Chemical Society, 1952