Empowering non-covalent hydrogen, halogen, and [S-N]2 bonds in synergistic molecular assemblies on Au(111).
Nanoscale
; 14(48): 17895-17899, 2022 Dec 15.
Article
en En
| MEDLINE
| ID: mdl-36458674
ABSTRACT
Non-covalent bonds are fundamental for designing self-assembled organic structures with potentially high responsiveness to mechanical, light, and thermal stimuli. The weak intermolecular interaction allows triggering charge-transport, energy-conversion, enzymatic, and catalytic activity, to name a few. Here, we discuss the synergistic action that multiple highly-directional and purely electrostatic bonds have in assembling one molecular specie, namely 4,7-dibromobenzo[c]-1,2,5-thiadiazole (2Br-BTD), in two different patterns on the Au(111) surface. We find, using scanning tunneling microscopy (STM) and density functional theory (DFT), that multiple secondary-interactions strengthen the electrostatic attraction between the pnicogen and chalcogen atoms forming [S-N]2 heterocycles, the building block of the two networks. Among these interactions, there are halogen-halogen bonds that form characteristic supra-molecular synthons of 3, 4, or 6 molecules. However, not all these nodal structures contribute to the cohesion of the system. In such cases, other secondary bonds involving hydrogen or nitrogen compensate for the eventual deficiency.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
Nanoscale
Año:
2022
Tipo del documento:
Article
País de afiliación:
España