Multi-chiral materials comprising metallosupramolecular and covalent helical polymers containing five axial motifs within a helix
Francisco Rey‐Tarrío, Emilio Quiñoá, Gustavo Fernández, Félix Freire
Abstract
Abstract Supramolecular and covalent polymers share multiple structural effects such as communication mechanisms among monomer repeating units, which are related to their axial helical structure. Herein, a unique multi-helical material combining information from both metallosupramolecular and covalent helical polymers is presented. In this system, the helical structure described by the poly(acetylene) (PA) backbone ( cis-cisoidal , cis-transoidal ) guides the pendant groups in a fashion where a tilting degree emerges between a pendant and the adjacent ones. As a result, a multi-chiral material is formed comprising four or five axial motifs when the polyene skeleton adopts either a cis-transoidal or cis-cisoidal configuration: the two coaxial helices—internal and external—and the two or three chiral axial motifs described by the bispyridyldichlorido Pt II complex array. These results show that complex multi-chiral materials can be obtained by polymerizing appropriate monomers that combine both point chirality and the ability to generate chiral supramolecular assemblies.