Hydrogen capture by porphyrins at the TiO<sub>2</sub>(110) surface

Lovat, Giacomo; Forrer, Daniel; Abadía, Mikel; Dominguez, Marcos; Casarin, Maurizio; Rogero, Celia; Vittadini, Andrea; Floreano, Luca

doi:10.1039/c5cp05437k

Cited by 31 publications

(75 citation statements)

References 43 publications

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“…Additionally, the authors report the hydrogen uptake from the substrate (hydroxyl groups, hydrogen bulk interstitials) and/or from the residual gas by the molecules in the first layer [52]. Of the above-mentioned porphyrin species, only 2H-TPP has been studied with STM by Lovat et al [52]. Similar results were reported by Wang et al [53].…”

Section: Reviewmentioning

confidence: 72%

“…However, studies devoted to understanding the interface properties of an organic layer on titania surfaces are not so numerous [49,52–60]. Among these studies, three reports outline the adsorption properties and behaviour of metal-free porphyrins on TiO 2 (110) surfaces [52–54], five study various zinc porphyrins on both the (110) and (011) surfaces [55–59], and just a single report covers copper porphyrins deposited on the (110) face of the rutile [60]. Recently, zinc porphyrins have also been used in a heteromolecular system as underlayers for the adsorption of CuPc on TiO 2 .…”

Section: Reviewmentioning

confidence: 99%

“…Lovat et al [52] investigated the adsorption of three differently functionalized metal-free porphyrins, i.e., 2 H - tert -butyltetraphenylporphyrin (2H-TBTPP), 2 H -tetraphenylporphyrin (2H-TPP) and 2 H -octaehtylporphyrin (2H-OEP). The different side groups do not introduce a specific affinity for the substrate.…”

Section: Reviewmentioning

confidence: 99%

“…Indeed, the central macrocycle in 2H-TBTPP is ca. 1 Å higher above the substrate than in 2H-OEP; the height for 2H-TPP is found at a point approximately halfway [52]. From the NEXAFS measurements, it is evident that each of the three analysed species adsorbs with the central macrocycle almost parallel to the substrate.…”

Section: Reviewmentioning

confidence: 99%

“…From the NEXAFS measurements, it is evident that each of the three analysed species adsorbs with the central macrocycle almost parallel to the substrate. Additionally, the authors report the hydrogen uptake from the substrate (hydroxyl groups, hydrogen bulk interstitials) and/or from the residual gas by the molecules in the first layer [52]. Of the above-mentioned porphyrin species, only 2H-TPP has been studied with STM by Lovat et al [52].…”

Section: Reviewmentioning

confidence: 99%

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

Prauzner‐Bechcicki¹,

Zając²,

Olszowski³

et al. 2016

Beilstein J. Nanotechnol.

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Titanium dioxide, or titania, sensitized with organic dyes is a very attractive platform for photovoltaic applications. In this context, the knowledge of properties of the titania–sensitizer junction is essential for designing efficient devices. Consequently, studies on the adsorption of organic dyes on titania surfaces and on the influence of the adsorption geometry on the energy level alignment between the substrate and an organic adsorbate are necessary. The method of choice for investigating the local environment of a single dye molecule is high-resolution scanning probe microscopy. Microscopic results combined with the outcome of common spectroscopic methods provide a better understanding of the mechanism taking place at the titania–sensitizer interface. In the following paper, we review the recent scanning probe microscopic research of a certain group of molecular assemblies on rutile titania surfaces as it pertains to dye-sensitized solar cell applications. We focus on experiments on adsorption of three types of prototypical dye molecules, i.e., perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA), phtalocyanines and porphyrins. Two interesting heteromolecular systems comprising molecules that are aligned with the given review are discussed as well.

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Section: Reviewmentioning

confidence: 72%

Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

Section: Reviewmentioning

confidence: 99%

See 3 more Smart Citations

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

Prauzner‐Bechcicki¹,

Zając²,

Olszowski³

et al. 2016

Beilstein J. Nanotechnol.

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Interfacial Reactions of Tetraphenylporphyrin with Cobalt‐Oxide Thin Films

Wechsler

Fernández

Tariq

et al. 2019

Chemistry A European J

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We have studied the adsorption and interfacial reactions of 2H-tetraphenylporphyrin (2HTPP) with cobalt-terminated Co 3 O 4 (111)a nd oxygen-terminated CoO(111)t hin films using synchrotron-radiation X-ray photoelectrons pectroscopy.A lready at 275 K, we find evidence for the formation of am etalateds pecies, most likely CoTPP,o nb oth surfaces. The degree of self-metalation increases with temperature on both surfaces until 475 K, where the metalation is almostc omplete. At 575 Kt he porphyrin coverage decreases drastically on the reducible cobalt-terminated Co 3 O 4 (111)surface, while highert emperatures are needed on the non-reducible oxygen-terminated CoO(111). The low temperature self-metalation is similar to that observed on MgO(100)s urfaces, but drastically different from that observed on TiO 2 (110), where no self-metalation is observeda tr oomt emperature. Figure 4. LEED diffraction patterns and Co 2p spectra of clean CoO(111)a nd Co 3 O 4 (111)a tr oom temperaturea nd of Co 3 O 4 (111)w ith adsorbed 2HTPP aftera nnealing to 675 K.Figure 5. N1 sX PS spectraa fter adsorption of 2HTPP on Co 3 O 4 (111)a nd on CoO(111)a t2 75 Ka nd on MgO (100) [13] and TiO 2 (110) [12] at room temperature.

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Self‐Metalation of Anchored Porphyrins on Atomically Defined Cobalt Oxide Surfaces: In situ Studies by Surface Vibrational Spectroscopy

Wähler

Schuster

Libuda

2020

Chemistry A European J

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Metalation of anchored porphyrinsi se ssential for their functionality at hybrid interfaces.I nt his work, we have studiedt he anchoringa nd metalation of af unctionalized porphyrin derivative, 5-(4-carboxyphenyl)-10,15,20-triphenylporphyrin (MCTPP), on an atomically-definedC oO(100) film under ultrahigh vacuum(UHV) conditions.W ef ollow both the anchoring to the oxide surface and the self-metalation by surfaceC o 2 + ions via infrared reflection absorptions pectroscopy (IRAS). At 150 K, MCTPP multilayer films adsorb molecularly on CoO(100)w ithout anchoring to the surface. Upon heatingt o1 95 K, the first layer of porphyrin molecules anchors via formationof ab ridgings urface carboxylate. Above 460 K, the MCTPP multilayer desorbs and only the anchored monolayer resides on the surface up to temperatures of 600 Ka pproximately.T he orientation of anchored MCTPPd epends on the surface coverage. At low coverage, the MCTPP adopts an early flat-lyinggeometry,w hereas an upright standingfilm is formed near the multilayer coverage. Self-metalationo fM CTPP depends critically on the surface temperature, the coverage and on the molecular orientation. At 150 K, metalation is largely suppressed, while the degree of metalation increases with increasing temperature and reaches av alue of around 60 %i nt he first monolayer at 450 K. At lower coverage higherm etalation fractions (85 % and above)a re observed, similar as for increasing temperature.

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Hydrogen capture by porphyrins at the TiO₂(110) surface

Cited by 31 publications

References 43 publications

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

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

Interfacial Reactions of Tetraphenylporphyrin with Cobalt‐Oxide Thin Films

Self‐Metalation of Anchored Porphyrins on Atomically Defined Cobalt Oxide Surfaces: In situ Studies by Surface Vibrational Spectroscopy

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Hydrogen capture by porphyrins at the TiO2(110) surface

Cited by 31 publications

References 43 publications

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

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

Interfacial Reactions of Tetraphenylporphyrin with Cobalt‐Oxide Thin Films

Self‐Metalation of Anchored Porphyrins on Atomically Defined Cobalt Oxide Surfaces: In situ Studies by Surface Vibrational Spectroscopy

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Hydrogen capture by porphyrins at the TiO₂(110) surface