Polymorphism of Porphyrin Molecules on Ag(111) and How to Weave a Rigid Monolayer
作者： Florian Buchner , Karmen Comanici , Norbert Jux , Hans-Peter Steinrück , Hubertus Marbach
DOI: 10.1021/JP074448Z
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摘要: The molecular arrangement and the internal conformation of Co(II)-5,10,15,20-tetrakis-(3,5-di-tert-butylphenyl)porphyrin (Co(II)-TTBPP) on Ag(111) was studied by scanning tunneling microscopy (STM) under ultrahigh vacuum (UHV) conditions. Interestingly, four different arrangements were found using routes to prepare porphyrin films. After preparation a film with coverage slightly below one monolayer thermal sublimation, three clearly distinguishable could be observed. Alternatively, prepared deposition multilayer followed subsequent annealing desorb excess molecules. Thereby, an additional, very rigid herringbone structure formed via thermally activated process, covering most surface. ordered phases go along conformations individual On basis STM images submolecular resolution, models for lateral polymorphs in...
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