Halogen bonds in 2D supramolecular self-assembly of organic semiconductors.
Weak interactions between bromine, sulphur, and hydrogen are shown to stabilize 2D supramolecular monolayers at the liquid-solid interface. Three different thiophene-based semiconducting organic molecules assemble into close-packed ultrathin ordered layers. A combination of scanning tunneling microscopy (STM) and density functional theory (DFT) elucidates the interactions within the monolayer. Electrostatic interactions are identified as the driving force for intermolecular Br···Br and Br···H bonding. We find that the SS interactions of the 2D supramolecular layers correlate with the hole mobilities of thin film transistors of the same materials.
Institut National de la Recherche Scientifique and Centre for Self-Assembled Chemical Structures, Université du Québec, 1650 boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada. gutzler@emt.inrs.ca
Rico
R
Gutzler
Chaoying
C
Fu
Afshin
A
Dadvand
Yun
Y
Hua
Jennifer M
JM
MacLeod
Federico
F
Rosei
Dmitrii F
DF
Perepichka