Micellar Nanoparticles of Coil-Rod-Coil Triblock Copolymers for Highly Sensitive and Ratiometric Fluorescent Detection of Fluoride Ions
文献类型：期刊论文
| 作者 | Hu, Jinming2; Zhang, Guoying2; Geng, Yanhou1; Liu, Shiyong2 |
| 刊名 | MACROMOLECULES
 |
| 出版日期 | 2011-10-25 |
| 卷号 | 44期号:20页码:8207-8214 |
| ISSN号 | 0024-9297 |
| DOI | 10.1021/ma201777p |
| 英文摘要 | We report on the fabrication of a novel type of ratiometric fluorescent polymeric probes for fluoride ions (F(-)) based on self-assembled micellar nanoparticles of P(MMA-co-NBDAE)-b-PF-b-P-(MMA-co-NBDAE) coil-rod-coil triblock copolymer, where MMA, NBDAE, and PF are methyl methacrylate, 4-(2-acryloyloxyethylamino)-7-nitro-2,1,3-benzoxadiazole, and polyfluorene, respectively. Blue-emitting conjugated PF block and green-emitting NBDAE moieties with F(-) turn-off characteristics within the PMMA block serve as fluorescence resonance energy transfer (FRET) donors and switchable acceptors, respectively. For coil rod coil triblock copolymer in a good solvent such as THF, the blue emission of PF block dominates due to unimolecularly dissolved state associated with ineffective FRET process. The addition of F(-) ions only leads to similar to 2.92-fold decrease of fluorescence intensity ratio, I(515)/I(417), of characteristic NBDAE and PF emission bands. In acetone, the triblock copolymer spontaneously self-assembles into micelles possessing PF cores and NBDAE-labeled PMMA coronas. In the absence of F(-) ions, effective FRET processes between micellar cores and coronas occurs, resulting in prominently enhanced NBDAE emission. Upon addition of F(-) ions, the quenching of NBDAE emission bands leads to similar to 8.75-fold decrease in the emission intensity ratio, I(515)/I(417), which is also accompanied by naked eye-discernible fluorometric transition from cyan to blue emissions and colorimetric transition from green to yellowish. At a micellar concentration of 0.1 g/L in acetone at 25 degrees C, the detection limit of F(-) ions can be down to similar to 4.78 mu M (similar to 0.09 ppm). This work presents a new example of polymeric micelles-based optical F probes and manifests that, upon proper structural design and optimization of spatial distribution of FRET donors and acceptors, self-assembled micelles of coil-rod-coil triblock copolymers serve as better ratiometric fluorescent F(-) ion sensors possessing visual detection capability, as compared to that of molecularly dissolved chains. |
| 语种 | 英语 |
| WOS记录号 | WOS:000295907200039 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/71613]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Geng, Yanhou |
| 作者单位 | 1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China 2.Univ Sci & Technol China, CAS Key Lab Soft Matter Chem, Dept Polymer Sci & Engn, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, Jinming,Zhang, Guoying,Geng, Yanhou,et al. Micellar Nanoparticles of Coil-Rod-Coil Triblock Copolymers for Highly Sensitive and Ratiometric Fluorescent Detection of Fluoride Ions[J]. MACROMOLECULES,2011,44(20):8207-8214. |
| APA | Hu, Jinming,Zhang, Guoying,Geng, Yanhou,&Liu, Shiyong.(2011).Micellar Nanoparticles of Coil-Rod-Coil Triblock Copolymers for Highly Sensitive and Ratiometric Fluorescent Detection of Fluoride Ions.MACROMOLECULES,44(20),8207-8214. |
| MLA | Hu, Jinming,et al."Micellar Nanoparticles of Coil-Rod-Coil Triblock Copolymers for Highly Sensitive and Ratiometric Fluorescent Detection of Fluoride Ions".MACROMOLECULES 44.20(2011):8207-8214. |
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来源：化学研究所
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