Journal ArticleDOI
Self-Assembly of Carboxyalkylphosphonic Acids on Metal Oxide Powders
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TLDR
The structures formed by adsorption of carboxyalkylphosphonic acids on metal oxide powders were characterized by solid-state NMR and FTIR-PAS (Fourier transform infrared photoacoustic spectroscopy) as discussed by the authors.Abstract:
The structures formed by adsorption of carboxyalkylphosphonic acids on metal oxide powders were characterized by solid-state NMR and FTIR-PAS (Fourier transform infrared photoacoustic spectroscopy). A series of diacids, HO2C(CH2)nPO3H2 (n = 2, 3, 11, and 15), were deposited on nonporous TiO2 and ZrO2 powders and nanocrystalline ZrO2 with average particle diameters of 21, 30, and 5 nm, respectively. Solid-state 31P NMR, combined with FTIR-PAS, indicates that the phosphonic acid group binds selectively to the surface, producing a monolayer of carboxylic acid terminated chains. The average chain conformation depends on the substrate in addition to the chain length. Ordered samples display thermal order/disorder transitions similar to other self-assembled monolayer systems. The more restricted chain mobility relative to analogous methyl-terminated chains is attributed to hydrogen-bonding among the pendant carboxylic acid groups. These results demonstrate that phosphonic acids are useful for selectively introd...read more
Citations
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Self-assembled monolayers of thiolates on metals as a form of nanotechnology.
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Self-assembled monolayers of thiols and dithiols on gold: new challenges for a well-known system
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Hydrophilic and superhydrophilic surfaces and materials
TL;DR: The definition of superhydrophilic substrates has not been clarified yet, and unrestricted use of this term to hydrophilic surfaces has stirred controversy in the surface chemistry community.
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Hybrid materials from organophosphorus coupling molecules
TL;DR: In this paper, organophosphorus acids and their derivatives (salts, esters) are complementary of organosilicon coupling molecules for the preparation of hybrid organic-inorganic materials, by sol-gel processing or surface modification.
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Inorganic Materials as Supports for Covalent Enzyme Immobilization: Methods and Mechanisms
Paolo Zucca,Enrico Sanjust +1 more
TL;DR: The most common inorganic supports for covalent immobilization of the enzymes are reviewed, with particular focus on their advantages and disadvantages in terms of enzyme loadings, operational stability, undesired adsorption, and costs.
References
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Journal ArticleDOI
Formation and Structure of Self-Assembled Monolayers.
TL;DR: Monolayers of alkanethiolates on gold are probably the most studied SAMs to date and offer the needed design flexibility, both at the individual molecular and at the material levels, and offer a vehicle for investigation of specific interactions at interfaces, and of the effect of increasing molecular complexity on the structure and stability of two-dimensional assemblies.
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Spontaneously organized molecular assemblies. 1. Formation, dynamics, and physical properties of n-alkanoic acids adsorbed from solution on an oxidized aluminum surface
David L. Allara,Ralph G. Nuzzo +1 more
TL;DR: On montre qu'il peut y avoir formation de couches monomoleculaires, orientees, a empilement compact, lors de ladsorption d'acides n-alcanoiques sur des supports d'aluminium oxyde, a partir de solutions diluees as mentioned in this paper.
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Spontaneously organized molecular assemblies. 2. Quantitative infrared spectroscopic determination of equilibrium structures of solution-adsorbed n-alkanoic acids on an oxidized aluminum surface
David L. Allara,Ralgh G. Nuzzo +1 more
TL;DR: Determination de la structure des couches monomoleculaires des acides alcanoiques, a 16-22 atomes de carbone, termines par des groupes methyle, vinyle ou propargyle, formees lors de ladsorption sur de l'oxyde d'Al, a partir d'une solution dans l'hexadecane as mentioned in this paper.
Journal ArticleDOI
Self-Assembled Monolayers of Alkylphosphonic Acids on Metal Oxides
TL;DR: The infrared spectra of octadecylphosphonic acid (ODPA) monolayers indicate a degree of conformational order comparable to self-assembled mono-layers on planar substrates.