高等学校化学学报 ›› 2012, Vol. 33 ›› Issue (06): 1333.doi: 10.3969/j.issn.0251-0790.2012.06.035

• 高分子化学 • 上一篇    下一篇

1-甲基-3-(2-甲基丙烯酰乙基)-咪唑氯离子液体/ 苯乙烯无规共聚物及其CdTe量子点复合物的合成

李雪, 倪旭峰, 梁振华, 沈之荃   

  1. 教育部高分子合成与功能构造重点实验室, 浙江大学高分子科学研究所, 杭州 310027
  • 收稿日期:2011-11-18 出版日期:2012-06-10 发布日期:2012-06-10
  • 通讯作者: 倪旭峰, 男, 博士, 副教授, 主要从事催化与可控聚合研究; 沈之荃, 女, 教授, 博士生导师, 中国科学院院士, 主要从事高分子化学研究. E-mail:xufengni@zju.edu.cn
  • 基金资助:

    中央高校基本科研业务费专项资金(批准号: 2011QNA4025)、浙江省新材料及加工工程省重中之重学科开放课题(批准号: 20110926)和浙江省科技厅基金资助.

Synthesis of Imidazolium Ionic Liquid/Styrene Random Copolymer and Its Nanocomposite with CdTe Quantum Dot

LI Xue, NI Xu-Feng, LIANG Zhen-Hua, SHEN Zhi-Quan   

  1. Key Laboratory of Macromolecular Synthesis and Functionalization, Ministry of Education, Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
  • Received:2011-11-18 Online:2012-06-10 Published:2012-06-10

摘要: 以偶氮二异丁腈(AIBN)为引发剂, 通过自由基聚合制备了1-甲基-3-(2-甲基丙烯酰乙基)-咪唑氯离子液体和苯乙烯的无规共聚物P(MMEIM+Cl--co-St). 用红外光谱、核磁共振氢谱和凝胶渗透色谱表征了共聚物的结构. 共聚物的氯仿溶液与巯基乙酸稳定的CdTe量子点水溶液混合, 通过静电相互作用复合组装, 得到澄清透明且稳定的CdTe/P(MMEIM+Cl--co-St)纳米复合物的氯仿溶液. 复合物的紫外吸收光谱、荧光发射光谱和透射电子显微镜的表征结果表明, 量子点均匀分散于共聚物中, 无团聚, 且保持了量子点的荧光性能.

关键词: 纳米复合物, 咪唑, 量子点, 荧光性能

Abstract: Side-chain imidazolium-functionalized random copolymer P(MMEIM+Cl--co-St) was synthesized by free-radical copolymerization of 1-methyl-3-(2-methacryloyloxy ethyl) imidazolium chloride(MMEIM+Cl-) and styrene(St) with azodiisobutyrounitrile(AIBN) as initiator. The structure of random copolymer was characterized by FTIR, 1H NMR and GPC analyses. By the electrostatic interaction between positively charged imidazolium-functionalized P(MMEIM+Cl--co-St) and the negatively charged aqueous CdTe quantum dots(QDs), fluorescent nanocrystal-polymer composites CdTe/P(MMEIM+Cl--co-St) were prepared conveniently. UV-Vis absorption and photoluminescence(PL) spectra indicated the photochemical stability and strong fluorescent emission of CdTe/P(MMEIM+Cl--co-St) composites. The transmission electron microscopy(TEM) photograph shows that the CdTe QDs in composites are monodisperse, uniform and no significant surface deterioration or aggregation of the QDs occurred during the composite synthesis.

Key words: Nanocomposite, Imidazole, Quantum dot, Fluorescence property

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