RT Journal Article
T1 Supramolecular polymerization of [6]helicene-based cyano-luminogens: on the overall efficiency of self-assembled circularly polarized emitters
A1 López Gandul, Lucia
A1 Rodríguez Riego, Rafael
A1 Vanthuyne, Nicolas
A1 Crassous, Jeanne
A1 Sánchez Martín, Luis
AB The synthesis of the [6]helicene-based luminophores 1 and 2 is reported. These chiral systems, endowed with cyano-stilbene fragments, form supramolecular polymers by the operation of intermolecular H-bonding interactions between the amides present in the peripheral side chains. The dissimilar disubstitution of 1 and 2 plays a crucial role in their self-assembling features. Thus, 1 does not show an efficient π-stacking of the central aromatic moiety. Instead, its self-assembling process results in a zig-zag arrangement of the monomeric units to form the aggregated species. On the other hand, 2 presents an efficient overlap of the aromatic backbones that affords a co-facial arrangement of the monomeric units. The solvent-dependent studies indicate that both [6]helicenes self-assemble following a cooperative supramolecular polymerization mechanism with a higher degree of cooperativity and stability for compound 2. The enantioenriched samples of both 1 and 2 display a rich dichroic pattern that changes when the supramolecular polymerization takes place. Furthermore, the presence of the cyano-stilbene moieties gives rise to an aggregation induced emission effect. The inherent chirality of both the monomeric and aggregated species of 1 and 2 provides the systems with CPL-emitting properties, presenting a remarkable overall CPL-efficiency, quantified by the BCPL parameter, that increases upon supramolecular polymerization.
PB Royal Society of Chemistry
YR 2024
FD 2024
LK https://hdl.handle.net/20.500.14352/109216
UL https://hdl.handle.net/20.500.14352/109216
LA eng
NO López, Lucía & Rodríguez, Rafael & Vanthuyne, Nicolas & Crassous, Jeanne & Sanchez, Luis. (2024). Supramolecular Polymerization of [6]Helicene-Based Cyano-Luminogens. On the Overall Efficiency of Self-Assembled Circularly Polarized Emitters. Nanoscale. 16. 10.1039/D4NR02110J.
NO 2024 Acuerdos transformativos CRUE
NO Centre National de la Recherche Scientifique (Francia)
NO Fondo Europeo de Desarrollo Regional
NO Ministerio de Ciencia, Innovación y Universidades (España)
NO Xunta de Galicia
DS Docta Complutense
RD 7 abr 2025