STM Examination of Trithiapentacone on Vicinal Gold (788)

Trithiapentacone (TTPO) is a member of a group of promising novel pentacene derivatives of interest in organic electronics for their excellent resistance to photooxidation and a range of band gaps. TTPO is a robust molecule with a HOMO-LUMO gap of 1.95 eV that can be thermally evaporated onto an electrode. TTPO is a polar species of pentacene with centered oxygen and sulfur bridge substituents. The vicinal gold (788) surface is a well studied surface on which pentacene molecules and other pentacene derivatives such as 6,13-dichloropentacene self assemble in long range order. We will present a STM study of TTPO on Au (788) addressing the possibility of self-assembly for organic semiconductor applications.