Supramolecule-regulated photophysics of oligo(p-phenyleneethynylene)-based rod-coil block copolymers: effect of molecular architecture.
Supramolecule-regulated photophysics of oligo(p-phenyleneethynylene)-based rod-coil block copolymers: effect of molecular architecture.
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DOI：
10.1002/chem.200700305
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发表时间：
2008-01
期刊：
影响因子：
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通讯作者：
Kan‐Yi Pu;Xiaoying Qi;Yanli Yang;Xiaomei Lu;Ting-Cheng Li;Quli Fan;Chen Wang;B. Liu;H. Chan-H
中科院分区：
文献类型：
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作者：
Kan‐Yi Pu;Xiaoying Qi;Yanli Yang;Xiaomei Lu;Ting-Cheng Li;Quli Fan;Chen Wang;B. Liu;H. Chan-H
采用原子转移自由基聚合方法合成了三种新的具有不同拓扑结构的棒状-卷曲嵌段共聚物，它们由相同的低聚对苯乙炔（OPE）棒状组分和相同的卷曲组分组成。从固态结构和自组装能力两个方面对它们的物理化学性质进行了系统的研究和比较。这些共聚物具有与OPE棒相似的固有物理化学性质，如在稀溶液中所反映的。然而，它们在固态下的物理化学性质被超分子组织操纵成不同的。广角X射线衍射（WAXD）和原子力显微镜（AFM）的数据表明，这些共聚物具有不同的自组装能力，这是由于杆的分子结构依赖的π-π相互作用。因此，这些共聚物以不同的机理形成固态聚集体，从而导致固态发光性质的差异。
Three new topology-varied rod-coil block copolymers, comprising the same oligo(p-phenyleneethynylene) (OPE) rod components and the same coil components, were synthesized by atom-transfer radical polymerization. Their photophysical properties were systematically studied and compared in consideration of their solid-state structures and self-assembly abilities. These copolymers have similar intrinsic photophysical properties to the OPE rods, as reflected in dilute solution. However, their photophysical properties in the solid state are manipulated to be dissimilar by supramolecular organization. Wide-angle X-ray diffraction (WAXD) and atomic force microscopy (AFM) data demonstrate that these copolymers possess different self-assembly abilities due to the molecular-architecture-dependent pi-pi interactions of the rods. Hence, the aggregates in the solid state are formed with a different mechanism for these copolymers, bringing about the discrepancy in the solid-state luminescent properties.