Self-assembly of C₆₀ on a ZnTPP/Fe(001)–p(1 × 1)O substrate: observation of a quasi-freestanding C₆₀ monolayer

• Guglielmo Albani,
• Michele Capra,
• Alessandro Lodesani,
• Alberto Calloni,
• Gianlorenzo Bussetti,
• Marco Finazzi,
• Franco Ciccacci,
• Alberto Brambilla,
• Lamberto Duò and
• Andrea Picone

Beilstein J. Nanotechnol. 2022, 13, 857–864, doi:10.3762/bjnano.13.76

• Fullerene (C60) has been deposited in ultrahigh vacuum on top of a zinc tetraphenylporphyrin (ZnTPP) monolayer self-assembled on a Fe(001)–p(1 × 1)O substrate. The nanoscale morphology and the electronic properties of the C60/ZnTPP/Fe(001)–p(1 × 1)O heterostructure have been investigated by scanning

• tunneling microscopy/spectroscopy and ultraviolet photoemission spectroscopy. C60 nucleates compact and well-ordered hexagonal domains on top of the ZnTPP buffer layer, suggesting a high surface diffusivity of C60 and a weak coupling between the overlayer and the substrate. Accordingly, work function

• measurements reveal a negligible charge transfer at the C60/ZnTPP interface. Finally, the difference between the energy of the lowest unoccupied molecular orbital (LUMO) and that of the highest occupied molecular orbital (HOMO) measured on C60 is about 3.75 eV, a value remarkably higher than those found in

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

• sterically more demanding substituents will vary film morphologies one can, for example, inspect the results of the single-crystal crystallographic characterization even of the compounds displayed in Figure 1. It is instructive to notice, that for ZnTPP(OMe)4 [13] the formation of 2D layers is observed in

• -(N-n-butylcarbamoyl)methoxyphenyl) [17] one decreases the density to the materials to ρ = 1.036 g/cm3 compared to ρ = 1.491 g/cm3 for ZnTPP(OMe)4 [13] or ρ = 1.398 g/cm3 for CuTPP(OMe)4 [16]. Thus, we report herein on two novel series of (metallo)porphyrins of the type H2/MTPP(C(O)N(R)2)4 (R = Me

Ordering of Zn-centered porphyrin and phthalocyanine on TiO₂(011): STM studies

• Piotr Olszowski,
• Lukasz Zajac,
• Szymon Godlewski,
• Bartosz Such,
• Rémy Pawlak,
• Antoine Hinaut,
• Res Jöhr,
• Thilo Glatzel,
• Ernst Meyer and
• Marek Szymonski

Beilstein J. Nanotechnol. 2017, 8, 99–107, doi:10.3762/bjnano.8.11

• , Lojasiewicza 11, 30-348 Krakow, Poland, University of Basel, Department of Physics, Klingelbergstrasse 82, 4056 Basel, Switzerland 10.3762/bjnano.8.11 Abstract Zn(II)phthalocyanine molecules (ZnPc) were thermally deposited on a rutile TiO2(011) surface and on Zn(II)meso-tetraphenylporphyrin (ZnTPP) wetting

• studied copper phthalocyanine (CuPc) and ZnTPP heterostructures. It was found that the central metal atom may play some role in ordering and growth of phthalocyanine/ZnTPP heterostructures, causing differences in stability of upright standing ZnPc versus CuPc molecular chains at given thermal annealing

• molecular structures were unstable against the STM tip, precluding any high-resolution imaging. It was found, however, that this situation could be greatly improved if the wetting layer of the native CuPc molecules was substituted by Zn(II)meso-tetraphenylporphyrins (ZnTPP) [5]. The present work extends

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

• -tetraphenylporphyrinzinc(II) (ZnTPP) with 5-(4-carboxyphenyl)-10,15,20-triphenylporphyrinzinc(II) (COOH-ZnTPP) on the (011) surface of TiO2. At a low coverage, ZnTPP molecules adsorb in a flat-lying conformation and are very mobile on the surface, with their motion limited to surface reconstruction rows, i.e., along the

• manipulated by the tip [56]. Already, at a low coverage, some of the molecules form 1D π–π-stacked structures along the [0−11] direction (Figure 5). In this structure, COOH-ZnTPP molecules lift their porphyrin ring up leaving –COOH oriented toward the substrate. As the coverage increases, the number of 1D

• . [56] stated that the –COOH groups remain intact upon adsorption on the TiO2(011) surface. Only recently, Zajac et al. [57] have compared the adsorption of ZnTPP and COOH-ZnTPP on the (110) surface of TiO2. Both molecules adopt a planar configuration. At a submonolayer coverage, COOH-ZnTPP molecules

Carbon nano-onions (multi-layer fullerenes): chemistry and applications

• Juergen Bartelmess and
• Silvia Giordani

Beilstein J. Nanotechnol. 2014, 5, 1980–1998, doi:10.3762/bjnano.5.207

• , the authors estimated that approximately one pyridine functionality per 120 CNO surface carbon atoms was present. The pyridine groups were then decorated with Zn-tetraphenylporphyrin (ZnTPP) what was confirmed by NMR spectroscopy and electrochemistry. No further spectroscopic studies were carried out

• with the presented CNO–ZnTPP supramolecular complex. A further example of a [2 + 1] cycloaddition on CNOs was reported by Kong et al., who used different nitrene derivatives to covalently functionalize pristine CNOs [33] (Scheme 6). The CNO starting material was reacted with either 2-azidoethanol

• with Zn-tetraphenylporphyrin (ZnTPP) [32]. Illustration of polymerization reactions on CNOs following initial [2 + 1] cycloaddition reaction of nitrenes [33]. “Tour” functionalization of CNOs and subsequent “click”-addition of a ZnTPP-derivative [37]. Fluorophore–CNO conjugates derived from benzoic