Two-Step Thermochromism in Poly(3-docosoxy-4-methylthiophene): Mechanistic Similarity to Poly(3-docosylthiophene)
Dinesh Chalasani, Joshua K. Potvin, Brett L. Lucht, William B. Euler, J. Polym. Sci. A: Polym. Chem., 2010, 48, 4370 – 4373
Abstract
Poly(3-docosoxy-4-methylthiophene) (PDMT) was synthesized and investigated. PDMT can form a mesophase by rapid quenching from the isotropic melt. Variable- temperature reflection and fluorescence spectroscopy of thin films and differential scanning calorimetry were used to study the thermal behavior of PDMT. PDMT shows a two-step thermochromic transition from the mesophase, and endotherms in the thermograms could be assigned to melting of each phase. A comparison to with related poly(3-alkylthiophene)s suggests that the mechanism of the thermochromic transition is very similar.
