Citation: SHU Qiao-Zhen, CHEN Xin, CHEN Kai-Hua, JIANG Jin-Qiang, NI Zhong-Bin, ZHANG Hong-Wu, LIU Xiao-Ya, CHEN Ming-Qing. Synthesis and Properties of Amphiphilic Photosensitive Telechelic Polymer C-PNIPAAm[J]. Acta Physico-Chimica Sinica, ;2010, 26(10): 2845-2850. doi: 10.3866/PKU.WHXB20100929 shu

Synthesis and Properties of Amphiphilic Photosensitive Telechelic Polymer C-PNIPAAm

1.
School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, P. R. China

Received Date: 23 March 2010
Available Online: 27 September 2010
Fund Project: 国家自然科学基金(20704017, 50973044)资助项目 (20704017, 50973044)

Coumarin-containing disulfide (C-S-S-C) was designed and synthesized, which could be used as chain transfer agent with tributylphosphine and water. With N-isopropyl acrylamide (NIPAAm) as monomer and azodiiso- butyronitrile (AIBN) as initiator, an amphiphilic photosensitive telechelic polymer (C-PNIPAAm) was synthesized. The polymer was characterized by Fourier transform infrared (FT-IR) spectroscopy, gel permeation chromatography (GPC) and proton nuclear magnetic resonance spectroscopy (¹H-NMR). We found that the polymer can form micelles in water itself with fluorescein as a hydrophobic agent. When irradiated by UV light (λ>310 nm), the coumarin unit at the end of the polymer chain was photodimerized, which changed the micelle structure and hydrophobic fluorescein was effectively released to the water. Dynamic laser scattering (DLS) showed that the average diameter of the micelles increased from56.6 nmto 101.0 nmafter irradiation.
- Coumarin,
- Poly N-isopropyl acrylamide,
- Fluorescein,
- Photo-dimerization,
- Amphiphilic
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