Reversible Thermochromism in Hydrogen-Bonded Polymers Containing Polydiacetylenes†
We thank the financial support by Korea Science and Engineering Foundation through the Hyper-Structured Organic Materials Research Center at the Seoul National University. We thank Professor Zin at POSTECH for helpful discussions with X-ray characterization.
Graphical Abstract
Out of the blue: A reversible temperature-dependent change in the absorption characteristics of spin-coated terephthalic acid/diacetylene polymers is observed. The polymer is prepared by topochemical photopolymerization of the diacetylene side chains of the stacked terephthalic acid units (see picture). The absorption bands of the polymeric product move reversibly from 640 nm (blue form of the polymer) to 580 nm (red form) during heating–cooling cycles.
