Controlling PorphyrinNanoarchitectures at Solid Interfaces.

Two complementary examples of porphyrin nanoarchitectonicsare presented. The fabrication of binary molecular monolayers usingtwo different porphyrin molecules, tetrakis(3,5-di-t-butyl-4-hydroxyphenyl)porphyrin (1) and tetrakis(4-pyridyl)porphyrin (2), by depositionin ultrahigh vacuum was demonstrated. Two unusual heteromolecularmonolayer structures were observed, with one exhibiting good separationof 1molecules within the monolayer. Also, a syntheticnanoarchitectonic approach was used to prepare self-assembled molecularnanowires at a mica substrate. The nanowires could be observed togrow using atomic force microscopy (AFM), and the network structuresof the nanowires could be influenced by manipulation using the AFMprobe tip. [ABSTRACT FROM AUTHOR]