Hybrid inorganic-organic composite nanoparticles from crosslinkable polyfluorenes
Hybrid inorganic-organic composite nanoparticles from crosslinkable polyfluorenes
复制标题
由可交联聚芴制成的杂化无机-有机复合纳米粒子
DOI：
10.1039/c3tc30266k
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发表时间：
2013
影响因子：
6.4
通讯作者：
Behrendt J
中科院分区：
文献类型：
--
作者：
Behrendt J
Polyfluorenes with pendant alkoxysilyl groups have been used to prepare inorganic–organic composite nanoparticles (diameter = 80–220 nm) in which the conjugated polymer is dispersed within a silica matrix. Preparation of these nanoparticles is achieved by simultaneous nanoprecipitation of the conjugated polymer and hydrolysis/crosslinking of the alkoxysilyl groups under basic conditions. The composition of the nanocomposites is controlled by addition of an alkoxysilane monomer, tetramethylorthosilicate. The hybrid nanoparticles form highly stable dispersions in water and buffer (pH 9.2). The size of the nanoparticles can be tuned by varying the amount of the alkoxysilane monomer added during the nanoprecipitation process. Increasing the relative amount of alkoxysilane monomer also increases the proportion of polyfluorene chains that adopt the higher energy β-phase conformation within the resultant nanoparticles. Nanoparticles with the highest silica content were found to have increased photoluminescence quantum yields. This work provides a controllable method for optimisation of the photophysical properties of light-emitting conjugated polymer nanoparticles via a simple aqueous processing technique.
