Block copolymers have attracted much attention in recent years as they can be used as building blocks to fabricate ordered nano-/micro- architectures, which possess potential applications in many fields. They have play vital roles in the researches of polymeric supramolecular self-assembly. We combine conjugated fluorescent blocks poly (phenylene vinylene) (PPV) and flexible corona blocks poly (2-vinyl pyridine) (P2VP) to build rod-coil type amphiphilic diblock copolymers PPV-<i>b</i>-P2VPs with strong fluorescence emission. With the help of the driven force of π-π interactions, instead of normally used crystallization, electrostatic interaction and crosslinking, nano-/micro- supramolecular fluorescent architectures of the copolymers were obtained by dissolving-cooling-aging process. The scales of the uniform structures could be controlled by the block length ratio of the copolymer, the concentrations of the growing solutions and other environmental factors. By modifying the alkyl side chains of PPV blocks and changing corona blocks, the regular morphologies of the obtained structures, including ribbons, scarfs, squares, diamonds, spiral towers and so on, could be transformed from one-dimensional (1-D) to three-dimensional (3-D). In addition, since the conjugated PPV blocks possess the semiconductor properties, the interesting electrical performance of individual 2-D assembly architecture has been investigated.<br/><br/>

Controlled self-assembly of conjugated block copolymers driven by π-π interactions

2019 Fall National Meeting

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