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 JM ; Zhang GY ; Geng YH ; Liu SY |
| 刊名 | macromolecules
 |
| 出版日期 | 2011 |
| 卷号 | 44期号:20页码:8207-8214 |
| 关键词 | MESOPOROUS SILICA NANOPARTICLES ANION RECOGNITION RADICAL POLYMERIZATION RAFT POLYMERIZATION CONJUGATED POLYMERS BLOCK-COPOLYMERS CHEMICAL SENSORS AQUEOUS-MEDIA RECEPTORS POLYFLUORENES |
| ISSN号 | 0024-9297 |
| 通讯作者 | geng yh |
| 中文摘要 | 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. |
| 收录类别 | SCI收录期刊论文 |
| 语种 | 英语 |
| WOS记录号 | WOS:000295907200039 |
| 公开日期 | 2012-06-08 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/44274]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Hu JM,Zhang GY,Geng YH,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 JM,Zhang GY,Geng YH,&Liu SY.(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 JM,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. |
入库方式： OAI收割
来源：长春应用化学研究所
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