PbS@P(NIPAM-co-TSt)功能复合物的合成及其荧光性能研究

doi:10.6023/A12030028

化学学报 ›› 2012, Vol. 70 ›› Issue (16): 1704-1708.DOI: 10.6023/A12030028 上一篇下一篇

研究论文

PbS@P(NIPAM-co-TSt)功能复合物的合成及其荧光性能研究

王成志, 李润, 成浩, 姜韬, 殷明, 陈欣, 江金强, 刘晓亚

江南大学化学与材料工程学院无锡 214122

投稿日期:2012-03-20 发布日期:2012-06-11
通讯作者: 江金强, 刘晓亚
基金资助:
项目受国家自然科学基金(Nos. 20704017, 50973044)和2010年度新世纪优秀人才支持计划(NCET-10-0452)资助.

Synthesis and Fluorescence Study of the Novel PbS@P(NIPAM-co-TSt) Complexes

Wang Chengzhi, Li Run, Cheng Hao, Jiang Tao, Yin Ming, Chen Xin, Jiang Jinqiang, Liu Xiaoya

School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122

Received:2012-03-20 Published:2012-06-11
Supported by:
Project supported by the National Natural Science Foundation of China (Nos. 20704017, 50973044) and the Program for New Century Excellent Talents in University (NCET-10-0452).

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摘要/Abstract

以4-氯亚甲基苯乙烯和硫脲为原料, 获得含有烷基异硫脲盐的苯乙烯类可聚合单体(TSt), 然后将其与N-异丙基丙烯酰胺(NIPAM)共聚合合成温敏性聚合物P(NIPAM-co-TSt), 进一步在弱碱性条件下使得有机异硫脲盐与Pb(AcO)₂·3H₂O中的铅源反应生成含有PbS纳米粒子的PbS@P(NIPAM-co-TSt)聚合物复合材料. 利用红外光谱(FTIR)、核磁(¹H NMR)、X射线衍射(XRD)、荧光光谱(FL)等手段对聚合物及复合物进行了各项表征, 以确认PbS@P(NIPAM-co-TSt)复合物的合成, 并用纳米粒度仪和透射电镜法等对聚合物胶束及复合物颗粒的大小与形貌进行了测定. 结果表明PbS@P(NIPAM-co-TSt)纳米聚合物复合物既具有良好的荧光性能, 且其荧光特征可随体系的温度和浓度而发生变化、具有LCST(低临界溶解温度)特征. 同时发现当聚合物体系中引入了PbS形成复合物后, 复合物的粒径较之前聚合物的粒径分布明显减小. 我们认为类似的环境敏感型复合物能拓展聚合物的应用领域并在很多地方具有广泛的应用前景.

关键词: 烷基异硫脲盐, PNIPAM, 纳米粒子, 复合物, 温敏性

Nowadays, the environmental sensitive polymer complexes play a more and more important role in the field of science study. Herein we demonstrate that the alkylisothiouronium-containing styrene monomer (TSt) was synthesized via 4-vinylbenzyl chloride and thiourea, which could be copolymerized with NIPAM to synthesize the temperature sensitive polymer of P(NIPAM-co-TSt) by radical polymerization. Then, the PbS complexes of PbS@P(NIPAM-co-TSt) were prepared on the basis of the interaction between alkylisothiouronium and Pb(AcO)₂·3H₂O in the aqueous solution of weakly alkaline. Its chemical structure was characterized by detail. For example, Fourier transformation infrared (FTIR), nuclear magnetic resonance (¹H NMR), XRD (X-ray diffraction) and fluorescence spectrum to ensure the synthesis of PbS@P(NIPAM-co-TSt) complex. Besides, nanometer granularity apparatus, dynamic light scattering (DLS) and transmission electron microscope (TEM) were employed to survey the size and physiognomy of polymer micelles and complexes. The photoluminescence properties were also studied. It was found that PbS@P(NIPAM-co-TSt) complex exhibits characteristic fluorescence intensity, which was promoted by the PbS nanoparticles. Meanwhile, its fluorescence intensity increased along with the temperature, which very consists with the LCST (lower critical solution temperature) characteristic of PNIPAM. The results indicated that its fluorescene intensity would go up with the addition of the complex’s concentration and the raising of the temperature. The diameter of PbS@P(NIPAM-co-TSt) complex can also be reduced obviously by introducing the PbS nanoparticles to the system. What is more, its diameter had a declining trend when the temperature exceeded the LCST of it and kept stable in the end. Thus, on the one hand, these kinds of complexes possess the properties in both polymers and nanoparticles, such as PbS. On the other hand, we think that such environmental sensitive complexes must have a bright future, and also could make a lot of potential applications as optical materials in a great many areas, such as biological, medical science, cells, chemistry and so on.

Key words: alkylisothiouronium, PNIPAM, nanoparticles, complexes, temperature sensitive

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王成志, 李润, 成浩, 姜韬, 殷明, 陈欣, 江金强, 刘晓亚. PbS@P(NIPAM-co-TSt)功能复合物的合成及其荧光性能研究[J]. 化学学报, 2012, 70(16): 1704-1708.

Wang Chengzhi, Li Run, Cheng Hao, Jiang Tao, Yin Ming, Chen Xin, Jiang Jinqiang, Liu Xiaoya. Synthesis and Fluorescence Study of the Novel PbS@P(NIPAM-co-TSt) Complexes[J]. Acta Chimica Sinica, 2012, 70(16): 1704-1708.

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PbS@P(NIPAM-co-TSt)功能复合物的合成及其荧光性能研究

Synthesis and Fluorescence Study of the Novel PbS@P(NIPAM-co-TSt) Complexes

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