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形态可调控的荧光纳米粒子的合成,光物理性质及其双光子细胞成像
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摘要
本文中,我们成功设计并合成了一种新颖的基于聚对苯亚乙炔(OPE)的水溶性荧光两亲物。由于OPE共轭分子的疏水-亲水性质,我们通过调控OPE的水溶液浓度,可以得到一种尺寸大小从19.6nm到93.5nm,表面形态从"谷粒状"到"草莓状"变化的自组装纳米粒子。通过测量该纳米粒子的细胞毒性和细胞吸收,我们能够评估出其潜在的生物医学应用价值。紧接着,我们通过使用人体胰腺癌细胞(PANC-1 cells)进行的双光子细胞成像的实验表明这种纳米粒子主要处于细胞质中。与此同时,这种纳米球可能作为药物载体或者诸如磁纳米粒子(MNPs)和金纳米粒子(GNPs)之类的无机纳米粒子来形成多功能的纳米探针。更令人振奋的是,纳米粒子表面上大量的氨基有利于生物分子的进一步修饰,这就很可能会引起智能探针在生物医学领域中更加重要的运用前景。
A novel water-soluble fluorescent amphiphile based on amino polyethylene glycol(PEG-NH2) substituted oligo(p-phenyleneethynylene)(OPE) was designed and synthesized successfully.Due to the hydrophobic-hydrophilic property of the OPE conjugated molecule,self-assembled nanoparticles with the size ranging from 19.6 nm to 93.5 nm along with the change of morphology from "grain" to "strawberry" were conveniently prepared via adjusting concentrations of OPE aqueous solution.Besides,abundant amino groups on particle surface are available for further modification of biomolecules,which may lead to specific probing and therapy in biomedical field.
引文
[1]Yuan,Y.;Liu,J.;Liu,B.Angew.Chem.2014,53(28):7163.
    [2]Pecher,J.;Mecking,S.Chem.Rev.2010,110(10):6260.

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