Tetraphenyl–porphyrin decorated anatase TiO2 catalysts for the visible–light photocatalytic oxidation of gaseous ammonia at room temperature

Adsorption, self-assembly and self-metalation of tetra-cyanophenyl porphyrins on semiconducting CoO(100) films

“…Most surface-science studies investigated porphyrins on (noble) metal surfaces illustrating the role of functional groups in the creation of self-assembly superstructures and also in (self-)metalation processes [2][3][4]. For applications in photo catalysis [5], photovoltaics [6], and others it is necessary to decouple the porphyrins from metal substrates either by (ultra-)thin insulating layers [7][8][9][10] or by using insulating or semiconducting substrates from the beginning [11][12][13]. To study the properties of molecules on bulk semiconducting and insulating substrates is met with several problems, most notably that of anchoring the molecules for adsorption studies under clean ultra-high vacuum (UHV) conditions [14].…”