Color-Tunable Amphiphilic Segmented π-Conjugated Polymer Nano-Assemblies and Their Bioimaging in Cancer Cells
作者:Karnati Narasimha、Manickam Jayakannan
DOI:10.1021/acs.macromol.6b00660
日期:2016.6.14
are highly biocompatible and nontoxic to cells up to 60 μg/mL. Cellular uptake studies by confocal microscope further exposed that these nanoparticles were internalized in the cancer cells and they were predominantly accumulated in the nucleus. The present investigation opens up new amphiphilic segmented π-conjugated polymer design for producing diverse supramolecular assemblies and also demonstrates
我们报告了独特的颜色可调两亲分段π共轭聚合物设计和它们的π堆栈驱动的各种自组装纳米结构,并证明了它们作为宫颈癌和乳腺癌细胞中生物成像的新型水基发光纳米颗粒探针的应用。寡聚亚苯基亚乙烯基(OPV)被用作刚性发光的π核,寡聚亚乙基氧基被用作柔性的间隔基,通过Witting-Horner聚合路线构建了新型的两亲性分段π共轭聚合物。使用三环癸烷亚甲基氧基,2-乙基己氧基或甲氧基侧基改变π核的刚度,并优化了适当的π核几何结构以实现最大的芳族π堆积相互作用。溶剂诱导的聚合物链聚集在良好/不良溶剂组合中表现出从一维螺旋纳米纤维到三维球形纳米组件的形态转变。这种形态转换伴随着荧光颜色从蓝到白到黄的变化。展示了CIE颜色坐标x = 0.25和y对于白光= 0.32,然后是聚集和分离的OPV发色团的集体发射。电子和原子显微镜,稳态光物理研究,时间分辨的荧光衰减分析和动态光散射方法使我们能够建立分段OPV聚合物