Different Aspects of 2H-Tetrakis-di-tert-butylphenylporphyrin on Ag(111)

Abstract

Concepts already established ( Chap. 5 and Sects. 6.2– 6.4 in Chap. 6), e.g., in situ metalation of free base porphyrins, were expanded to the free base porphyrin 2H-5,10,15,20-tetrakis-(3,5-di-tert-butyl)-phenylporphyrin (2HTTBPP). The monolayer coverage on Ag(111) was achieved by multilayer desorption (Sect. 7.2). A herringbone structure was observed and conclusions on the internal conformation were drawn (Sect. 7.3). The voltage-dependent constant current images visualize different sub-molecular units (Sect. 7.4). In addition, the principle of the well-established method to generate clean metalloporphyrins on Ag(111) was verified by dosing iron atoms onto a 2HTTBPP layer, resulting in FeTTBPP.