Chinese Journal of Polymer Science

, Volume 33, Issue 8, pp 1086–1095 | Cite as

Photo-dimerization characteristics of coumarin pendants within amphiphilic random copolymer micelles

  • Huan Chang
  • Mei Shi
  • Ya-nan Sun
  • Jin-qiang Jiang (江金强)
Papers

Abstract

The photo-dimerization characteristics of coumarin pendants within amphiphilic random copolymer micelles in aqueous solution was comprehensively investigated using various selected wavelength light in the UV-Vis-NIR region. The time-dependent photo-dimerization degree (PD) changes in the photo-dimerization experiments showed saturating behaviors with intensity-independent of PDmax values at 28%, 44%, 92%, 85%, 36%, 35%, 32% and 31% for 254, 288, 320, 360, 400, 500, 650 and 900 nm irradiations, respectively. The irradiation experiments at 254 and 288 nm announced the occurring of an asymmetric equilibrium of photo-dimerization and photo-cleavage at the used conditions. Both the alternative irradiation cycles of 360 and 254 nm, 650 and 254 nm showed a partially, but evidently reversible photo-dimerization tendency.

Keywords

Polymer micelles Coumarin UV-Vis-NIR Photo-dimerization Photo-cleavage 

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Supplementary material

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Huan Chang
    • 1
  • Mei Shi
    • 1
  • Ya-nan Sun
    • 2
  • Jin-qiang Jiang (江金强)
    • 1
  1. 1.Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education School of Chemistry & Chemical EngineeringShaanxi Normal UniversityXi’anChina
  2. 2.Shandong Vocational College of IndustryZiboChina

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