Modulation of chromatic reversibility of polydiacetylene Langmuir Schafer (LS) films by cadmium ion Ad/desorption

Gil Sun Lee, Tae Young Kim, Dong June Ahn

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Although the reversibility of 10, 12-pentacosadiynoic amino meta-acid (PCDA-mBzA) against temperature and pH was reported, the modulation of reversibility by ion adsorption at terminal functional group has not been investigated. In this work, we developed a simple method for modulating the reversibility of PCDA-mBzA films upon a thermal stimulus by cadmium ion adsorption inducing the breakage of the outer hydrogen bonding of two hydrogen bonds, which are responsible for the reversible properties of PCDA-mBzA. External reflection-Fourier transform infrared (ER-FTIR) analyses revealed that the hydrogen bonding between the carboxylic acid groups was broken through ion adsorption and only a single hydrogen bond between the amide groups remained in the PCDA-mBzA polymer. In addition, PCDA-mBzA films could recover their original property through cadmium ion desorption. These results present that the transition between reversibility and irreversibility can be modulated artificially simply through the adsorption and desorption of metal ions.

Original languageEnglish
Pages (from-to)312-315
Number of pages4
JournalJournal of Industrial and Engineering Chemistry
Publication statusPublished - 2018 Nov 25

Bibliographical note

Funding Information:
This research was supported by the National Research Foundation of Korea (NRF 2017R1A2B3006770 , 2017M3D1A1039421 ) and the Korea University Grant .

Publisher Copyright:
© 2018 The Korean Society of Industrial and Engineering Chemistry


  • Ion adsorption
  • Langmuir-Schaefer films
  • Modulation
  • Polydiacetylene
  • Reversibility

ASJC Scopus subject areas

  • Chemical Engineering(all)


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