Extended iron phthalocyanine islands self-assembled on a Ge(001):H surface

• Rafal Zuzak,
• Marek Szymonski and
• Szymon Godlewski

Beilstein J. Nanotechnol. 2021, 12, 232–241, doi:10.3762/bjnano.12.19

• FePc molecules deposited at room temperature on Si(111):H serve as sources of single Fe atoms and undergo de-metalation [29]. Importantly, hydrogen-passivated Si/Ge surfaces may also act as platforms for nanostructurization by the atomically precise desorption of individual hydrogen atoms and the

Adsorption and self-assembly of porphyrins on ultrathin CoO films on Ir(100)

• Feifei Xiang,
• Tobias Schmitt,
• Marco Raschmann and
• M. Alexander Schneider

Beilstein J. Nanotechnol. 2020, 11, 1516–1524, doi:10.3762/bjnano.11.134

• keeping the substrate at that temperature during deposition or by short time (5 min) annealing. Either choice of thermal treatment resulted in the same molecular structures. Higher temperatures could not be applied to 2 without changing the appearance of the molecules. This is attributed to metalation of

Synthesis, spectroscopic characterization and thermogravimetric analysis of two series of substituted (metallo)tetraphenylporphyrins

• Rasha K. Al-Shewiki,
• Carola Mende,
• Roy Buschbeck,
• Pablo F. Siles,
• Oliver G. Schmidt,
• Tobias Rüffer and
• Heinrich Lang

Beilstein J. Nanotechnol. 2017, 8, 1191–1204, doi:10.3762/bjnano.8.121

• -up, gave 2 and 3 in yields exceeding 80% without any column-chromatographic purification (cf. Experimental section). The metalation reactions performed in this study correspond to the well-known “dimethylformamide method” (MII = Zn, Cu, Ni, Co), cf. Scheme 1 and [19]. In agreement with details

• reported for the dimethylformamide method, “[…]best results have been obtained with anhydrous metal chlorides[…]” [19], although the reaction temperatures should be kept at 140 °C. According to [19], complete metalation needs the subsequent addition of an excess of the metal chlorides. Hence, we decided to

• mixtures (ratio 1:1, v/v) as eluent, showing that they were formed in high purity. Furthermore, 1H NMR studies allowed us to monitor the progress of the metalation reactions of 2 and 3, even for the paramagnetic metalloporphyrins 2b,d and 3b,d. For example, the complete metalations of the free-base

Scanning probe microscopy studies on the adsorption of selected molecular dyes on titania

• Jakub S. Prauzner-Bechcicki,
• Lukasz Zajac,
• Piotr Olszowski,
• Res Jöhr,
• Antoine Hinaut,
• Thilo Glatzel,
• Bartosz Such,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2016, 7, 1642–1653, doi:10.3762/bjnano.7.156

• adsorption of metal-free porphyrins on the TiO2(110)-(1 × 1) surface, Wang et al. [53] investigated the metalation process of 2H-TPP with nickel atoms. The authors showed that it is possible to synthesize in situ NiTPP molecules from vapour-deposited Ni atoms and 2H-TPP molecules. The reaction to form NiTPP

• from 2H-TPP proceeds at room temperature when the 2H-TPP molecules are deposited first. When the deposition of metal atoms precedes the evaporation of a molecular material, elevated temperatures are needed to trigger the metalation reaction. Interestingly, upon metalation, the conformation and

• of NiTPP illustrates its four-fold symmetry in contrast to the two-fold symmetry images of 2H-TPP (Figure 4g and Figure 4i). Only recently a report on metalation of 2H-TPP to NiTPP on TiO2(110)-(1 × 2) surfaces has been published [54]. The authors note that post-annealing enhances metalation on the

In situ metalation of free base phthalocyanine covalently bonded to silicon surfaces

• Fabio Lupo,
• Cristina Tudisco,
• Federico Bertani,
• Enrico Dalcanale and
• Guglielmo G. Condorelli

Beilstein J. Nanotechnol. 2014, 5, 2222–2229, doi:10.3762/bjnano.5.231

• metalated in situ with Co by using wet chemistry. The efficiency of the metalation process was evaluated by XPS measurements and, in particular, on porous silicon, the complexation of cobalt was confirmed by the disappearance in the FTIR spectra of the band at 3290 cm−1 due to –NH stretches. Finally, XPS

• results revealed that the different surface–phthalocyanine interactions observed for flat and porous substrates affect the efficiency of the in situ metalation process. Keywords: metalation; phthalocyanine; silicon surface; surface functionalization; X-ray photoelectron spectroscopy (XPS); Introduction

• atoms [19][20]. However, no report of the direct metalation of covalently bonded Pc on inorganic surfaces has been reported, yet. In this work we study the silicon grafting of the tetra-4-(ω-undecenyloxy)phthalocyanine (thereafter 1-Pc) (Figure 1) and its interaction with a silicon surface. 1-Pc was