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Dual responsive spiropyran-ended poly(N-vinyl caprolactam) for reversible complexation with metal ions

  • Zhouxiaoshuang Yang
  • Feng Wang
  • Hui LiuEmail author
ORIGINAL PAPER
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Abstract

With the spiropyran-containing compound as the initiator, dual responsive spiropyran-ended poly(N-vinyl caprolactam) (SP-PNVCL) was synthesized by atom transfer radical polymerization. The structure of the resulting polymer was characterized by 1H NMR and gel permeation chromatography, and the polymer had both reversible light-responsive and thermo-sensitive behaviors. Metal ions could be bound between merocyanine formed by photoisomerization of spiropyran and the amino group of N-vinyl caprolactam unit through synergetic coordination. The complexation of SP-PNVCL with several metal ions was investigated by UV-Vis absorption spectroscopy, and it was found that SP-PNVCL might be used as a potential recognition probe for Fe2+, accompanied by obvious color change from colorless to brown by naked eye. The detection limit and photo-reversible recyclable behaviors of SP-PNVCL for Fe2+ were also investigated in details. The kind of spiropyran-ended poly(N-vinyl caprolactam) had great application potential in environment protection and biological area.

Keywords

N-vinyl caprolactam Spiropyran Dual responsive Complexation Metal ions 

Notes

Acknowledgements

This work was financially supported by National Natural Science Foundation of China (Grant No. 21376271) and the Hunan Provincial Science and Technology Plan Project, China (Grant No. 2016TP1007). Hui Liu also thanked for the help in testing from Advanced Research Center, Central South University.

Compliance with ethical standards

Conflict of interest

The authors declare no competing financial interest.

Supplementary material

10965_2019_1747_MOESM1_ESM.docx (593 kb)
ESM 1 (DOCX 593 kb)

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Copyright information

© The Polymer Society, Taipei 2019

Authors and Affiliations

  1. 1.College of Chemistry and Chemical EngineeringCentral South UniversityChangshaPeople’s Republic of China
  2. 2.Hunan Provincial Key Laboratory of Efficient and Clean Utilization of Manganese ResourcesCentral South UniversityChangshaPeople’s Republic of China

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