Creation of Centimeter‐Sized 2 D Crystalline Film by Crystallization of Homopolymer in Solution

Abstract

The 2D assembly of polymers to form free-standing and large crystalline films is quite appealing but very challenging. Although there have been some works using interface templates, reports of in situ assembly in solution are still rare. Herein, as imple strategy is developedf or the creation of af ree-standinga nd centimeter-sized 2D crystalline polymer film through crystallization of an amphiphilic brush polydiacetylene (PDA) in solution. Thef ilm exhibits good shapem emory,al ow dielectric constant, and good carrier mobility.T hiss trategym ay be applied extensively to produce av ariety of other macroscopic 2D crystalline polymer films for applications in electronics, catalysis, and so on.

Stimulus‐Responsive Tubular Conjugated Polymer 2D Nanosheets

“…Importantly, by introducing the judicious choice of head groups to diacetylene monomers a diverse range of self‐assembled morphologies can be produced. Notably, the self‐assembling characteristic of amphiphilic diacetylene monomers has been explored to organize into a layered structure, which is very promising to create 2D PDA nanosheets [48–52] . Meanwhile, the controlled formation of 2D polymer nanosheet often possesses a formidable challenge, the preparation of synthetic 2D PDA nanosheets can be achieved by a strategy of covalent‐linking of reactive diacetylene template that is pre‐organized in hierarchical layers in supramolecular polymer form via photoreaction without the need for chemical initiators, which enables high purity synthesis with no byproducts.…”