Surface Polymerization of Poly(<i>p</i>-phenylene-terephthalamide) on Ag(111) Investigated by X-ray Photoelectron Spectroscopy and Scanning Tunneling Microscopy

Schmitz, Christoph; Schmid, Martin; Gärtner, Stefan; Steinrück, Hans‐Peter; Gottfried, J. Michael; Sokołowski, M.

doi:10.1021/jp202986r

Cited by 19 publications

(16 citation statements)

References 33 publications

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“…Recently, a BE of 399.9 eV was reported for the N 1s component of the amino groups of tetra-amino benzene molecules on Cu(111) [36] and a BE of 399.8 eV was reported for amine groups of p -phenylenediamine on Ag(111). [41] Thus, in our case we ascribe the observed peak to the amino group of 4AP molecules on the Pt(111) surface.…”

Section: Resultssupporting

confidence: 51%

Adsorption and coupling of 4-aminophenol on Pt(111) surfaces

et al. 2016

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We have deposited 4-aminophenol on Pt(111) surfaces in ultra-high vacuum and studied the strength of its adsorption through a combination of STM, LEED, XPS and calculations. Although an ordered (2√3×2√3)R30° phase appears, we have observed that molecule-substrate interaction dominates the adsorption geometry and properties of the system. At RT the high catalytic activity of Pt induces aminophenol to lose the H atom from the hydroxyl group, and a proportion of the molecules lose the complete hydroxyl group. After annealing above 420K, all deposited aminophenol molecules have lost the OH moiety and some hydrogen atoms from the amino groups. At this temperature, short single-molecule oligomer chains can be observed. These chains are the product of a new reaction that proceeds via the coupling of radical species that is favoured by surface diffusion.

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Section: Resultssupporting

confidence: 51%

Adsorption and coupling of 4-aminophenol on Pt(111) surfaces

et al. 2016

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“…23,27,28 The N 1s spectrum is dominated by a single peak, which exhibits a small shoulder at lower binding energy. The main signal with BE 399.7 eV is assigned to the amide nitrogen group, 10,23,28 while the one at 398.5 eV is assigned to the terminating NH2-groups at the polymer/gas phase interface. 29 The peak assignment shows that the ultrathin amide film contains the chemical functionalities (amide, carboxylic acid, amine) that have been shown to govern the mechanism of water transport in reverse osmosis membranes.…”

Section: Peak Assignmentmentioning

confidence: 99%

Quantitative Characterization of a Desalination Membrane Model System by X-ray Photoelectron Spectroscopy

et al. 2019

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Aromatic polyamide films form the active layer in reverse osmosis (RO) desalination membranes.Despite widespread use of this technology, it suffers from low rejection rates for certain water contaminants and from membrane fouling. Through a better understanding of the fundamental surface chemical processes during reverse osmosis desalination, advances in membrane and material design are expected. The recent invention of a molecular layer-by-layer (mLbL) preparation technique 1 yields films that are sufficiently smooth to warrant investigation with high resolution microscopy and spectroscopy methods. We present high-resolution, quantitative XPS data on the surface chemistry of ultrathin polyamide films that can serve as a model system for 2 desalination membranes. We show that a quantitative analysis of the XPS spectra gives information on the functional groups of the film as well as other compounds present due to the synthesis under ambient conditions. Unpolymerized functional groups are identified and aid in understanding the degree of crosslinking. Investigation of polymers with synchrotron-based XPS requires taking beam induced changes into account. We quantify X-ray beam damage and show that beam damage to the polyamide is limited, allowing long-term investigation of thin polyamide films. Characterizing mLbL grown films in high-resolution XPS is the basis for a better understanding of the chemical interplay of polyamide surface functional groups with the major components of desalination systems.

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“…85 The condensation of boronic acids has also been initiated by e‐beam irradiation 86. Furthermore, the condensation between highly reactive acyl chlorides with amines on Ag(111) has shown to yield the respective polyamides 87–89…”

Section: On‐surface Synthesis On Metal Surfacesmentioning

confidence: 99%

On‐Surface Reactions

2015

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On-surface synthesis constitutes a rapidly growing field of research due to its promising application for creating stable molecular structures on surfaces. While self-assembled structures rely on reversible interactions, on-surface synthesis provides the potential for creating long-term stable structures with well-controlled properties, for example superior electron transport for future molecular electronic devices. On-surface synthesis holds the promise for preparing insoluble compounds that cannot be produced in solution. Another highly exciting aspect of on-surface synthesis is the chance to discover new reaction pathways due to the two-dimensional confinement of the reaction educts. In this review, we discuss the current state-of-the-art and classify the reactions that have been successfully performed so far. Special emphasis is put on electrically insulating surfaces, as these substrates pose particular challenges for on-surface synthesis while at the same time bearing high potential for future use, for example, in molecular electronics.

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Surface Polymerization of Poly(p-phenylene-terephthalamide) on Ag(111) Investigated by X-ray Photoelectron Spectroscopy and Scanning Tunneling Microscopy

Cited by 19 publications

References 33 publications

Adsorption and coupling of 4-aminophenol on Pt(111) surfaces

Adsorption and coupling of 4-aminophenol on Pt(111) surfaces

Quantitative Characterization of a Desalination Membrane Model System by X-ray Photoelectron Spectroscopy

On‐Surface Reactions

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