Two-step thermochromism in poly(3-docosoxy-4-methylthiophene): Mechanistic similarity to poly(3-docosylthiophene)
Document Type
Article
Date of Original Version
10-1-2010
Abstract
The two-step thermochromism in poly(3-docosoxy-4-methylthiophene) by using reflection and fluorescence spectroscopies and differential scanning calorimetry (DSC) was investigated. The polymer sample was prepared for DSC by drip-coating a solution of the polymer in tetrahydrofuran (THF) on the aluminum foil and evaporating the solvent. The polymer film was heated with a heat gun and rapidly quenched with liquid nitrogen to form the mesophase. Variable-temperature fluorescence spectra were recorded on Ocean Optics S2000 instrument with a blue LED light source (λ = 470 nm). The fluorescence spectrum (excited at 470 nm) of the mesophase contained a weak, broad emission with a maximum centered at ~650 nm. The emission band of the high temperature phase had peaks at 540 and 565 nm, with much greater intensity than the emission band of the mesophase.
Publication Title, e.g., Journal
Journal of Polymer Science, Part A: Polymer Chemistry
Volume
48
Issue
19
Citation/Publisher Attribution
Chalasani, Dinesh, Joshua K. Potvin, Brett L. Lucht, and William B. Euler. "Two-step thermochromism in poly(3-docosoxy-4-methylthiophene): Mechanistic similarity to poly(3-docosylthiophene)." Journal of Polymer Science, Part A: Polymer Chemistry 48, 19 (2010): 4370-4373. doi: 10.1002/pola.24236.