非共价键自组装制备聚对苯撑乙炔/聚丙烯酸水溶性荧光纳米粒子及其光物理行为研究

Water-soluble Light-emitting Nanoparticles Prepared by Non-covalent Bond Self-assembly of Functionalized Poly(p-phenyleneethynylene)s and Poly(acrylic acid)

通过功能化聚对苯撑乙炔(含羟基与氨基)和聚丙烯酸之间的非共价键自组装制备了一系列含共轭聚合物的水溶性荧光纳米粒子,并进行了相关结构和光学性质表征.研究表明,纳米粒子的大小和聚丙烯酸/聚对苯撑乙炔质量比直接相关.光物理性质研究表明,形成水溶性纳米粒子后,疏水的聚苯撑乙炔链在纳米粒子中易于形成π-链间聚集,其光物理性质与其在薄膜态时相似.

A series of water-soluble light-emitting nanoparticles were prepared from functionalized poly（p-phenyleneethynylene）s（PPE） and water-soluble poly（acrylic acid）（PAA） by non-covalent bond self-assembly.Their structures and optoelectronic properties were investigated through dynamic light scattering（DLS）,UV and PL spectroscopy.These results show a correlation between the size of the nanoparticles so formed and the mass ratio of PAA/PPE used.It was also found that after formation of nanoparticles in aqueous solution,the hydrophobic PPE chains tended to form π-interchain aggregation,just as it did in the solid state.