Halogen-substituted thiophenol molecules on Cu(111).
Para-halosubstituted thiophenols (X-TPs, where X is Br, Cl, or F) form ordered islands and monolayers on Cu(111) at temperatures as low as 81 K. At incomplete coverages, all X-TPs adsorb with the dehydrogenated thiol group attached to the substrate and the substituted ring inclined toward the surface, as verified experimentally and theoretically. The structure of ordered islands has a pronounced dependence on the nature of the halogen substituent: while unsubstituted TP and pentafluoro-TP molecules do not self-assemble into extended ordered patterns at 81 K, X-TP molecules form a range of different structures which depend both on the size and electronegativity of the substituent, as well as on the coverage.
Wong
K L
KL
Pierce Hall, University of California, Riverside, California 92521, USA.
Lin
X
X
Kwon
K-Y
KY
Pawin
G
G
Rao
B V
BV
Liu
A
A
Bartels
L
L
Stolbov
S
S
Rahman
T S
TS
D000327:Adsorption; D003300:Copper / Q000737:chemistry*; D006219:Halogens / Q000737:chemistry*; D016252:Microscopy, Scanning Tunneling; D008958:Models, Molecular; D010316:Particle Size; D010636:Phenols / Q000737:chemistry*; D012680:Sensitivity and Specificity; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D013499:Surface Properties; D013696:Temperature
D006219:Halogens; D010636:Phenols; D013438:Sulfhydryl Compounds; D003300:Copper; C042983:thiophenol