Sulfoxide‐Induced Homochiral Folding of ortho‐Phenylene Ethynylenes (o‐OPEs) by Silver(I) Templating: Structure and Chiroptical Properties. Issue 11 (24th January 2018)

• Record Type: Journal Article
• Authors: Resa, Sandra; Miguel, Delia; Guisán‐Ceinos, Santiago; Mazzeo, Giuseppe; Choquesillo‐Lazarte, Duane; Abbate, Sergio; Crovetto, Luis; Cárdenas, Diego J.; Carreño, M. Carmen; Ribagorda, María; Longhi, Giovanna; Mota, Antonio J.; Álvarez de Cienfuegos, Luis; Cuerva, Juan M.
• Is Part Of: Chemistry. Volume 24:Issue 11(2018)
• Page Start: 2653
• Page End: 2662
• Publication Date: 2018-01-24
• Subjects: chiroptical properties -- helical structures -- host–guest systems -- nanostructures -- supramolecular chemistry; Chemistry -- Periodicals; 540
• DOI: 10.1002/chem.201704897
• Languages: English
• ISSNs: 0947-6539

Abstract

Abstract: A new family of homochiral silver complexes based on carbophilic interactions with ortho ‐phenylene ethynylene ( o ‐OPE) scaffolds containing up to two silver atoms are described. These compounds represent a unique class of complexes with chirality at the metal. Chiral induction is based on the inclusion of chiral sulfoxides, which allow efficient transfer of chirality to the helically folded o ‐OPE, leading to circularly polarized luminescence (CPL)‐ and vibrational circular dichroism (VCD)‐active compounds. In the presence of silver(I) cations, carbophilic interactions dominate, which promote helical structures with a defined helicity. This is one of the very scarce examples of the use of such interactions in the attractive field of abiotic foldamers. The switching event has been extensively studied by using different chiroptical techniques, including circular dichroism, CPL, and VCD, and represents one of the few CPL switches described in the literature. Abstract : Silver twists : A new family of homochiral silver complexes based on carbophilic interactions with ortho ‐phenylene ethynylene ( o ‐OPE) scaffolds containing up to two silver atoms are described. In the presence of silver(I) cations, carbophilic interactions dominate, which promote helical structures with a defined helicity (see figure). This is one of the very scarce examples of the use of such interactions in the attractive field of abiotic foldamers.