Author: ["Patrick Kissel","Rolf Erni","W. Bernd Schweizer","Marta D. Rossell","Benjamin T. King","Thomas Bauer","Stephan Götzinger","A. Dieter Schlüter","Junji Sakamoto"]
CITE.CC academic search helps you expand the influence of your papers.
Abstract
Synthetic polymers are widely used materials, as attested by a production of more than 200 millions of tons per year, and are typically composed of linear repeat units. They may also be branched or irregularly crosslinked. Here, we introduce a two-dimensional polymer with internal periodicity composed of areal repeat units. This is an extension of Staudinger's polymerization concept (to form macromolecules by covalently linking repeat units together), but in two dimensions. A well-known example of such a two-dimensional polymer is graphene, but its thermolytic synthesis precludes molecular design on demand. Here, we have rationally synthesized an ordered, non-equilibrium two-dimensional polymer far beyond molecular dimensions. The procedure includes the crystallization of a specifically designed photoreactive monomer into a layered structure, a photo-polymerization step within the crystal and a solvent-induced delamination step that isolates individual two-dimensional polymers as free-standing, monolayered molecular sheets. A two-dimensional polymer with internal periodicity has now been constructed. The procedure involves the rational molecular design of monomers, which first crystallize into a laminar lattice. A photo-induced polymerization then occurs laterally within each layer, and the resulting polymer crystals are subsequently delaminated into individual, free-standing two-dimensional polymers. Cite this article
Kissel, P., Erni, R., Schweizer, W. et al. A two-dimensional polymer prepared by organic synthesis. Nature Chem 4, 287–291 (2012). https://doi.org/10.1038/nchem.1265 