Chirality Control and Its Memory at Microphase-Separated Interface of Self-Assembled Chiral Block Copolymers for Nanostructured Chiral Materials
Chirality Control and Its Memory at Microphase-Separated Interface of Self-Assembled Chiral Block Copolymers for Nanostructured Chiral Materials
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DOI：
10.1021/acsmacrolett.7b00493
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发表时间：
2017-09-01
影响因子：
7.015
通讯作者：
Ho, Rong-Ming
中科院分区：
文献类型：
--
作者：
Li, Ming-Chia;Ousaka, Naoki;Ho, Rong-Ming
在这里，我们展示了非手性发色染料作为由自组装驱动的含聚丙交酯的手性嵌段共聚物（BCP*）的接头的诱导手性，使非手性染料在微相分离界面处优先排列成单手螺旋阵列。非手性染料的这种螺旋排列可以在 BCP* 中的聚丙交酯水解后被“记忆”，并作为进一步手性诱导不同非手性染料的手性模板，可能通过界面处有吸引力的芳香族 pi-pi 相互作用，产生在所需波长下具有可调圆二色性信号的纳米结构手性材料。
Here, we show the induced chirality of an achiral chromophoric dye as a joint of polylactide-containing chiral block copolymers (BCPs*) driven by self-assembly, giving the achiral dyes preferentially arranged in a one-handed helical array at the microphase-separated interface. This helical arrangement of the achiral dyes can be "memorized" after hydrolysis of the polylactides in the BCPs* and serves as a chiral template for further chirality induction of different achiral dyes, probably through attractive aromatic pi-pi interactions at the interface, producing nanostructured chiral materials with tunable circular dichroism signals at desired wavelengths.