Functional Properties of PEG-<italic style="font-style: italic">b</italic>-PLys/C<sub>60</sub>/ZnTPPS Micelle

Chai Zhi-hua; Li Ang; An Ying-li; Shi Lin-qi

doi:10.11777/j.issn1000-3304.2017.16306

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Functional Properties of PEG-b-PLys/C₆₀/ZnTPPS Micelle

Research Article | 更新时间：2021-05-18

- Functional Properties of PEG-b-PLys/C₆₀/ZnTPPS Micelle
- Acta Polymerica Sinica Issue 2, Pages: 393-398(2017)
- 作者机构：
  
  南开大学高分子化学研究所药物化学生物学国家重点实验室功能高分子材料教育部重点实验室天津 300071
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.16306
  CLC：
- Published：20 February 2017，
  
  Received：30 September 2016，
  
  Revised：15 November 2016，
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Chai Zhi-hua, Li Ang, An Ying-li, Shi Lin-qi. Functional Properties of PEG-b-PLys/C₆₀/ZnTPPS Micelle. [J]. Acta Polymerica Sinica (2):393-398(2017)
DOI：

Chai Zhi-hua, Li Ang, An Ying-li, Shi Lin-qi. Functional Properties of PEG-b-PLys/C₆₀/ZnTPPS Micelle. [J]. Acta Polymerica Sinica (2):393-398(2017) DOI： 10.11777/j.issn1000-3304.2017.16306.

摘要

利用嵌段共聚物胶束将C

和5

20-四-（4-对磺酸基苯基）-锌卟啉（ZnTPPS）同时负载，在水相中实现电荷传递以扩大其应用范围.通过对ZnTPPS在复合胶束内的光学稳定性测定，发现C

的存在使ZnTPPS的稳定性得到极大的提高.以甲基紫精（MV

）为模型化合物，发现复合胶束光催化还原MV

能力最强，证明该复合胶束具有较强电子转移的能力和较高的光学活性.

Abstract

Block copolymer micelles of poly (ethylene glycol)-block-poly (L-lysine) (PEG-

-PLys) was used to load fullerene (C

) and zinc tetrakis (4-sulfonatophenyl) porphyrin (ZnTPPS) in water. The diblock copolymer of PEG-

-PLys was firstly synthesized

via

ring-opening polymerization. Then the PEG-

-PLys/C

micelles were prepared by association between PEG-

-PLys and C

in aqueous solution. ZnTPPS was added to the PEG-

-PLys/C

micelle solution and PEG-

-PLys/C

/ZnTPPS complex micelles were finally obtained by electrostatic interaction between ZnTPPS and PLys. The structure and photochemical properties of the PEG-

-PLys/C

/ZnTPPS complex micelles were characterized by dynamic light scattering

transmission electron microscopy

UV-Visible spectroscopy and fluorescence spectroscopy. The results showed that the PEG-

-PLys/C

/ZnTPPS complex micelles were reasonably monodisperse with an average hydrodynamic diameter of 80 nm. The complex micelles showed the typical UV-Vis spectra of ZnTPPS and C

. The Soret-band peak of ZnTPPS in the complex micelles was red-shifted from 421 to 430 nm

which was possibly caused by electron transfer from the ZnTPPS to the fullerene. In addition

the fluorescence emission spectra of ZnTPPS was obviously quenched in the complex micelles. These results suggested that ZnTPPS was assembled successfully into PEG-

-PLys/C

micelles. In order to investigate the role of C

in the photoprotection of ZnTPPS

the illumination of ZnTPPS encapsulated in different micelles was carried out under identical conditions using a 360 nm cut-off filter. Compared with ZnTPPS in the PEG-

-PLys/ZnTPPS electrostatic micelles

the ZnTPPS loaded in the complex micelles possessed higher photostability because of the reduced generation of singlet oxygen. The photoreduction of methyl viologen hydrate (MV

) was chosen as the model reaction to evaluate the electron-transfer efficiency of the complex micelles. The amount of MV

+·

produced by the complex micelles was higher than that by both free ZnTPPS and PEG-

-PLys/ZnTPPS electrostatic micelles. Thus the complex micelles showed better electron transfer ability and higher photoactivity because of the electron transfer from the porphyrin to the fullerene in the complex micelles.

关键词

富勒烯锌卟啉复合胶束光学活性

Keywords

FullereneZinc porphyrinComplex micellesPhotoactivity

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⁰

Functional Properties of PEG-b-PLys/C60/ZnTPPS Micelle

DOI：10.11777/j.issn1000-3304.2017.16306

摘要

Abstract

关键词

Keywords

references

Functional Properties of PEG-b-PLys/C₆₀/ZnTPPS Micelle