Organic molecules adsorbed iodine-modified

Itaya, K., Batina, N., Kunitake, M. etal. (1997) In situ scanning tunneling microscopy of organic molecules adsorbed on iodine-modified Au( 111), Ag( 111), and Pt( 111) electrodes. Solid-Liquid Electrochemical Interfaces. ACS Symposium Series, 656, 171-188. 

In Situ Scanning Tunneling Microscopy of Organic Molecules Adsorbed on Iodine-Modified Au(lll), Ag(lll), and Pt(lll) Electrodes... 

Summary. Structures and properties of iodine adlayers on Pt(l 11), Au(l 11), and other sLugle-crystal electrodes are described, based mainly on our recent STM studies. The imderpotential deposition of Ag on Pt(l 11) in the absence and presence of the iodine adlayer is also briefly described. It is shown that the iodine-modified electrodes are promising substrates for the investigation of the adsorption of organic molecules. High-resolution STM allows us to determine molecular arrangements and internal structures of molecules adsorbed on the iodine-modified electrodes in solution. 

The adsorption of these molecules has also been investigated on various iodine-modified electrodes such as I/Ag(lll), I/Pt(lll) and I/Rh(lll). Highly ordered adlayers of TMPyP were found to form on I/Au(l 11) and I/Ag(l 11), whereas less-ordered adlayers formed on I/Pt(lll) and I/Rh(lll) [41]. The surface mobility of iodine on Pt(l 11) is very slow, as shown in Fig. 1(b). TMPyP is adsorbed on I/Pt(l 11) as isolated molecules with a disordered arrangement These results suggest that the surface mobility of the iodine adatoms also plays an inqmrtant role in the ordering process of the organic adlayer. 

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