Citation: Huan Chang, Mei Shi, Ya-nan Sun, Jin-qiang Jiang. Photo-Dimerization Characteristics of Coumarin Pendants within Amphiphilic Random Copolymer Micelles[J]. Chinese Journal of Polymer Science, ;2015, 33(8): 1086-1095. doi: 10.1007/s10118-015-1657-4 shu

Photo-Dimerization Characteristics of Coumarin Pendants within Amphiphilic Random Copolymer Micelles

1.
Key Laboratory of Applied Surface and Colloid Chemistry, Ministry of Education School of Chemistry &
2.
Shandong Vocational College of Industry, Zibo 256414, China

Corresponding author: Jin-qiang Jiang,
Received Date: 7 November 2014
Revised Date: 30 November 2014

Fund Project: This work was financially supported by the National Natural Science Foundation of China (No. 21374056), the Natural Science Basic Research Plan in Shaanxi Province of China (NSBRP-SPC 2014JM2051), the Fundamental Research Funds for the Central Universities (GK201302045), Shaanxi Innovative Research Team for Key Science and Technology (2012KCT-21, 2013KCT-17) and the One Hundred Plan of Shaanxi Province.

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.
- Polymer micelles,
- Coumarin,
- UV-Vis-NIR,
- Photo-dimerization,
- Photo-cleavage
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沈阳化工大学材料科学与工程学院沈阳 110142