Infrared Spectra of Alkylphosphonic Acid Bound to Aluminium Surfaces

Luschtinetz, Regina; Seifert, Gotthard; Jaehne, Evelin; Adler, Hans-Jürgen P.

doi:10.1002/masy.200750837

Cited by 81 publications

(81 citation statements)

References 11 publications

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“…The SCC-DFTB method has been successfully applied in our group to study the adsorption of phosphonic and ethylphosphonic acids on aluminum and titanium oxides [10,15] . A recent review on the method and its approximations can be found elsewhere [16] .…”

Section: Computational Detailsmentioning

confidence: 99%

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Luschtinetz

Oliveira

Duarte

et al. 2010

Zeitschrift anorg allge chemie

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. Self-assembled monolayers of alkylphosphonic acids on aluminum oxide surfaces -A theoretical study. Zeitschrift für Anorganische und Allgemeine Chemie, 2010, 636 (8) (001) and boehmite γ-AlOOH (010) surface models. Mono-, bi-, and tridentate adsorption modes have been considered. In addition, the organization of single adsorbed molecules has been compared to the organization at full surface coverage. The height (thickness) of the self-assembled monolayers is always shorter than the length of the phosphonic acid molecules due to tilting of the alkyl chains. Tilt angles at full surface coverage are very similar to the tilt angle of a single adsorbed molecule, indicating that the density of the self-assembled monolayers is limited by the density of adsorption sites. The lateral interactions between alkyl chains are evidenced by small torsions of the adsorbed molecules, which may serve to minimize the repulsion forces between interchain hydrogen atoms. Similar tilt angles have been obtained for mono-, bi-, and tridentate adsorptions. Hence, the coordination mode cannot be characterized by the molecule tilting.____________ [a]

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Section: Computational Detailsmentioning

confidence: 99%

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Luschtinetz

Oliveira

Duarte

et al. 2010

Zeitschrift anorg allge chemie

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“…The latter corresponded to the surface plasmon resonance peak of Ag nanoparticles ( Figure 2A, curve 2) The appearance of a surface plasmon peak characteristic of Ag nanoparticles clearly indicated the reduction of Ag + to form Ag nano-tips onto the semiconductor nanoparticles. 33 40 Figure 2. (A) UV-Vis spectra and (B) Photoluminescence spectra of CdSe nanorods, before and after the hybrid formation.…”

Section: Resultsmentioning

confidence: 99%

“…This facile route was mediated an organic ligand (phenolic -OH) which could mediate phase transfer in addition to metal ion reduction at room temperature, thus avoiding the use of costly 40 organometallic precursors and/or toxic organic solvents. The procedure can be extended to a generalized method for different noble metal tipping on semiconductor nanorods through judicious selection of suitable precursors and ligands.…”

Section: Resultsmentioning

confidence: 99%

“…18 In Au-CdSe, as an example, enhanced photocatalytic reactions are possible in solution through charge separation at the M-SC interface. 6,17,19 A facile route to Au tip formation has been achieved where the metal precursor either (AuCl 3 ) or more recently (AuCl) and a 40 reducing agent are solubilized in the organic phase using surfactants. Control of reaction time, temperature and light activation can tune the structure from double tipped (both ends) to single tip to enlarged single tip.…”

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“…FTIR analyses were also carried out on CdSe rods capped with TOPO and alkyl phosphonic acid ( Figure 5) showing the characteristic peaks at 1463, 1376, 1151 and 1087 cm -1 which were related to -CH 3 groups of the capping ligand, P=O of alkyl phosphonic acids, 40 P=O of TOPO 41 and P-O-H of alkyl 50 phosphonic acids 41 respectively. After modification of the surface with DMP, curve 2, a new peak at 1409 cm -1 and a broad band at 3250 cm -1 emerged corresponding to -OH in plane bending vibration and stretching vibration respectively of the molecule.…”

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Silver Tip Formation on Colloidal CdSe Nanorods by a Facile Phase Transfer Protocol

Bala¹,

Ryan²

2013

Springer Proceedings in Physics

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A facile phase transfer procedure is described for the formation of uniform silver metal tips on II -VI semiconductor nanorods. Judicious choice of a functional ligand, dimethyl phenol (DMP), which binds to the semiconductor rod in the organic phase enables the transfer of metal ions from the aqueous phase and their reduction onto the nanorod. The metal tips initially from as 10 random sub< 2nm particles surrounding the nanorod which ripen to dual tips at the nanorod ends. The nanorod hybrids can be assembled into perpendicularly aligned arrays by simple solvent evaporation. The hybrid nanostructu res are characterised by transmission electron microscopy (TEM), scanning electron microscopy (SEM), X-ray diffraction (XRD), photoluminescence (PL), ultraviolet-visible spectroscopy (UV-vis) and X-ray photoelectron spectroscopy (XPS). A detailed FTIR analysis is also carried out to predict the role of the ligands in the tipping procedure.

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Layered Simple Hydroxides Functionalized by Fluorene‐Phosphonic Acids: Synthesis, Interface Theoretical Insights, and Magnetoelectric Effect

Evrard

Chaker

Roger

et al. 2017

Adv Funct Materials

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International audienceCopper- and cobalt-based layered simple hydroxides (LSH) are successfully functionalized by a series of fluorene mono- and diphosphonic acids, using anionic exchange reactions and a preintercalation strategy. The lateral functionalization of the fluorene moieties has only little impact on the overall structure of the obtained layered hybrid materials but it influences the organization of the molecules within the interlamellar spacing. For bulky fluorene (9,9-dioctyl derivative), luminescence is preserved when inserted into copper and cobalt hydroxydes, whereas it is completely quenched for the other fluorenes. Detailed characterization of the internal structure and chemical bonding properties for copper- and cobalt-based hybrids is performed via ancillary experimental techniques. For the copper-based LSH class, for which more elusive findings are found, first-principles molecular dynamics simulations unravel the fundamental stabilizing role of the H-bonding network promoted within the local environments of the fluorene mono- and diphosphonic acids. The cobalt series of compounds constitute a new class of hybrid magnets, with ordering temperatures ranging from 11.8 to 17.8 K and show a clear magnetoelectric effect. This effect appears above a threshold magnetic field, which is null below the magnetic ordering temperature, and it persists in the paramagnetic regime till about 110 K

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Infrared Spectra of Alkylphosphonic Acid Bound to Aluminium Surfaces

Cited by 81 publications

References 11 publications

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Self‐assembled Monolayers of Alkylphosphonic Acids on Aluminum Oxide Surfaces – A Theoretical Study

Silver Tip Formation on Colloidal CdSe Nanorods by a Facile Phase Transfer Protocol

Layered Simple Hydroxides Functionalized by Fluorene‐Phosphonic Acids: Synthesis, Interface Theoretical Insights, and Magnetoelectric Effect

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