Chiral columns forming a lattice with a giant unit cell.
Soft Matter
; 18(10): 2006-2011, 2022 Mar 09.
Article
en En
| MEDLINE
| ID: mdl-35188168
ABSTRACT
Mesogenic materials, quinoxaline derivatives with semi-flexible cores, are reported to form a new type of 3D columnar phase with a large crystallographic unit cell and Fddd lattice below the columnar hexagonal phase. The 3D columnar structure is a result of frustration imposed by the arrangement of helical columns of opposite chiralities into a triangular lattice. The studied materials exhibit fluorescence properties that could be easily tuned by modification of the molecular structure; for compounds with the extended π electron conjugated systems the fluorescence is quenched. For molecules with a flexible structure the fluorescence quantum yield reaches 25%. On the other hand, compounds with a more rigid mesogenic core, for which the fluorescence is suppressed, show effective photogeneration of charge carriers. For some materials bi-polar hole and electron transport was observed.
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Banco de datos:
MEDLINE
Idioma:
En
Revista:
Soft Matter
Año:
2022
Tipo del documento:
Article
País de afiliación:
Polonia