Double layer crystallization of heptahelicene on noble metal surfaces

0561264 - FZÚ 2023 RIV US eng J - Journal Article
Seibel, J. - Parschau, M. - Ernst, Karl-Heinz
Double layer crystallization of heptahelicene on noble metal surfaces.
Chirality. Roč. 32, č. 7 (2020), s. 975-980. ISSN 0899-0042. E-ISSN 1520-636X
Institutional support: RVO:68378271
Keywords : chiral crystallization * heptahelicene * scanning tunneling microscopy * surface science
OECD category: Condensed matter physics (including formerly solid state physics, supercond.)
Impact factor: 2.437, year: 2020
Method of publishing: Limited access
https://doi.org/10.1002/chir.23235

Resolution of enantiomers of chiral compounds via crystallization is the dominant method in chemical industry, but chiral recognition at the molecular level during this process is still poorly understood. Using single metal surfaces in ultrahigh vacuum as model system, the enantio-related transition from the monolayer structure into a double layer of the racemic mixture of heptahelicene has been studied with scanning tunneling microscopy. Submolecular resolution reveals enantiopure second layers on Ag(111) and almost enantiopure second layers on Au(111). In analogy to previous results on Cu(111), it is concluded that transition from the 2D first layer racemate into a layered racemate occurs.
Permanent Link: https://hdl.handle.net/11104/0333956