Preparation and Characterization of Polyfluorene-Based Supramolecular π-Conjugated Polymer Gels
Preparation and Characterization of Polyfluorene-Based Supramolecular π-Conjugated Polymer Gels
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DOI：
10.1021/jp109598y
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发表时间：
2011-03-24
影响因子：
3.7
通讯作者：
Huang, Wei
中科院分区：
文献类型：
--
作者：
Lin, Zong-Qiong;Shi, Nai-En;Huang, Wei
超分子π共轭聚合物基凝胶（SCPG）是一种重要的半导体软材料。在此，我们展示了基于 SCPG 的 1,2-二氯乙烷 (DCE) 溶液中的聚 (9,9-二辛基芴) (PFO)。 PFO/DCE 凝胶表现出与其他多态性不同的特征光致发光曲线。发射峰值约为。 550 nm 证明了聚芴中低能发射带的聚集或准分子机制。通过温度分辨荧光光谱和差示扫描量热法 (DSC) 研究了 PFD/DCE 凝胶的热可逆溶胶凝胶转变。根据扫描隧道显微镜（STM）和小角X射线散射（SAXS）分析提出了PFO/DCE凝胶的形成机制。冷冻干燥所得的干凝胶具有规则的互穿孔，孔径约为2-5μm。 π共轭聚合物的凝胶化为制备具有传感器和执行器潜在应用的多孔软半导体铺平了道路。
Supramolecular pi-conjugated polymer-based gels (SCPGs) are one important kind of semiconducting soft materials. Herein we demonstrate a poly(9,9-dioctylfluorene) (PFO) based on SCPG in 1,2-dichloroethane (DCE). The PFO/DCE gel exhibits a characteristic photoluminescence profile distinguished from other polymorphisms. The emission peak at ca. 550 nm evidences the aggregate or excimer mechanism of the low-energy emission band in polyfluorenes. Thermoreversible sol gel transition of PFD/DCE gel has been investigated by temperature-resolved fluorescence spectroscopy and differential scanning calorimetry (DSC). The formation mechanism of PFO/DCE gel has been proposed according to the scanning tunneling microscopy (STM) and small-angle X-ray scattering (SAXS) analysis. The obtained xerogel via freeze-drying exhibited regularly interpenetrated pores with the size of about 2-5 mu m. Gelation of pi-conjugated polymers paves a promising way to prepare porous soft semiconductors with potential applications of sensors and actuators.