Influence of Alkyl Chain Length on Phosphate Self-Assembled Monolayers

Spori, Doris M.; Venkataraman, Nagaiyanallur V.; Tosatti, Samuele; Durmaz, Firat; Spencer, Nicholas D.; Zürcher, Stefan

doi:10.1021/la700474v

Cited by 215 publications

(243 citation statements)

References 40 publications

Supporting

Mentioning

209

Contrasting

Order By: Relevance

“…Salts of these acids are used in cooling lubricants, e.g., waterbased cutting fluids. The low toxicity, ability to be chemisorbed on a metal surface, and some useful technological properties of acid esters of phosphoric acid continue to motivate researchers to look for effective corrosion inhibitors of various metals among these compounds and to study their protection mechanisms [5][6][7][8][9][10][11][12][13][14]. …”

mentioning

confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part III. Passivation and the role of the chemical structure of organophosphates

2017

Int. J. Corros. Scale Inhib.

View full text Add to dashboard Cite

This article continues the review of studies (2006)(2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016) dealing with the passivation of various metals by solutions of organic corrosion inhibitors. It provides an overview of papers on the passivating properties of organophosphates, their complexes and salts. The results of corrosion and electrochemical studies, as well as studies on the composition and structural features of surface layers on metals by a variety of physicochemical methods are considered. Organic phosphorus compounds are often called organophosphates, especially in the case of pesticides and even toxic agents. Of course, it is unlikely that such materials have application prospects for the inhibition of metal corrosion. That is why in this series of reviews we consider organophosphates in a narrower sense limited to phosphoric acid esters and their salts, as well as phosphonic acids, their salts or complex compounds with metal cations [1][2][3][4]. The easy synthesis of acid esters of phosphoric acid, the stability of mono-and disubstituted ester anions, their ability to form complexes and hydrophobic passive films on oxidized metal surfaces has been known for a long time [1]. They can be used for the passivation of phosphated metal surfaces, and their salts with amines are used within deicing formulations. These salts can inhibit not only corrosion but also formation of deposits, so they are used in two-phase systems in the oil industry. Since higher homologues are more effective, the solubility of alkylphosphonic acids is commonly increased by ethoxylation. Salts of these acids are used in cooling lubricants, e.g., waterbased cutting fluids. The low toxicity, ability to be chemisorbed on a metal surface, and some useful technological properties of acid esters of phosphoric acid continue to motivate researchers to look for effective corrosion inhibitors of various metals among these compounds and to study their protection mechanisms [5][6][7][8][9][10][11][12][13][14]. Key words: metal corrosion, inhibitors, metal passivation, organophosphates.

show abstract

mentioning

confidence: 99%

Organic corrosion inhibitors: where are we now? A review. Part III. Passivation and the role of the chemical structure of organophosphates

2017

Int. J. Corros. Scale Inhib.

View full text Add to dashboard Cite

show abstract

“…Similar to nonpolymeric phosphonates, initial electrostatic interactions in solution are likely stabilized in the subsequent dehydration step by the formation of covalent aluminophosphonate bonds (Al-O-P), which are hydrolytically more stable than Si-O-P bonds (23,24,29). To date, phosphonate derivatizations of metal oxide surfaces have predominantly used monophosphonate-terminated alkanes to form SAMs (24,(30)(31)(32)(33) or complex polyethylenglycol-polyalkylphosphonate graft copolymers (34,35). To our knowledge, simple aliphatic polymers containing many phosphonate side groups have not previously been described for protein antifouling applications on metal oxide surfaces.…”

Section: Discussionmentioning

confidence: 99%

Selective aluminum passivation for targeted immobilization of single DNA polymerase molecules in zero-mode waveguide nanostructures

Korlach

Marks

Cicero

et al. 2008

Proc. Natl. Acad. Sci. U.S.A.

209

147

View full text Add to dashboard Cite

Optical nanostructures have enabled the creation of subdiffraction detection volumes for single-molecule fluorescence microscopy. Their applicability is extended by the ability to place molecules in the confined observation volume without interfering with their biological function. Here, we demonstrate that processive DNA synthesis thousands of bases in length was carried out by individual DNA polymerase molecules immobilized in the observation volumes of zero-mode waveguides (ZMWs) in high-density arrays. Selective immobilization of polymerase to the fused silica floor of the ZMW was achieved by passivation of the metal cladding surface using polyphosphonate chemistry, producing enzyme density contrasts of glass over aluminum in excess of 400:1. Yields of single-molecule occupancies of Ϸ30% were obtained for a range of ZMW diameters (70 -100 nm). Results presented here support the application of immobilized single DNA polymerases in ZMW arrays for long-read-length DNA sequencing.fluorescence ͉ metal passivation ͉ microscopy ͉ polyvinyl phosphonic acid ͉ single molecule N anofabrication techniques have enabled new approaches to interrogate individual biomolecules by fluorescence techniques (reviewed in refs. 1 and 2). The extremely small size scale of the associated devices results in a drastic illumination volume reduction, allowing single-molecule investigations to take place at fluorophore concentrations increased to biologically relevant levels. In addition to higher temporal resolution and higher signal-to-noise ratios, they also provide spatial resolution beyond diffraction-limited optics.The zero-mode waveguide (ZMW) is one such nanophotonic confinement structure often consisting of a circular hole in a metal cladding film on a solid transparent substrate (3). In conjunction with laser-excited fluorescence, they provide observation volumes on the order of zeptoliters (10 Ϫ21 l), three to four orders of magnitude smaller than far-field excitation volumes. Applications of circular ZMWs have included the detection of single-molecule DNA polymerase activity by using labeled nucleotides at micromolar concentrations (3), the study of -repressor oligomerization dynamics (4), two-color crosscorrelation to rapidly screen for DNA restriction enzyme activity (5), and diffusion analysis of labeled membrane proteins in lipid bilayers of model membranes and living cells (6-11). C-shaped apertures have been described to study DNA hybridization interactions (12).ZMW technology applications have been limited by the unavailability of selective immobilization methods to position molecules exclusively in the observation volume, immediately above the transparent ZMW floor. One approach to selective immobilization exploits a feature inherent in the ZMW architecture. The transparent substrate and metal cladding are made of different materials, opening the possibility for a selective derivatization that will direct protein adsorption to the floor and not to the nearby metal walls. The nanometer size scale and three-dimensional n...

show abstract

“…23 In this study, nano titania P-25 (Evonik) was modified ex situ using OP. It has been already shown that using long alkyl chain phosphates led to increase the van der Waals interactions between the alkyl chains, all-trans conformation of the chains, increasing the packing density and therefore more surface OH groups are replaced with phosphate groups 24 which is not favorable to photocatalysis process ( Figure S2). OP with chemical formula (OH) 2 (O)PO(CH 2 ) 2 NH 2 was chosen to modify TiO 2 because of possessing short alkyl chain in order to assemble into a less dense structure.…”

Section: Surface Modifier Selectionmentioning

confidence: 99%

Phosphate Modification of Nano Titania and Its Effect on the Photodegradation of EDTA

Iravani¹,

Allahyari²,

Torab‐Mostaedi³

2016

Journal of the Brazilian Chemical Society

View full text Add to dashboard Cite

The surface of nano titania was phosphate modified and characterized by X-ray diffraction (XRD), attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR), energy dispersive X-ray analysis (EDX), and elemental analysis (CHN) to show the existence of phosphate in the modified nano titania. The resultant phosphated nano titania was applied for photocatalytic degradation of ethylenediaminetetraacetic acid disodium salt (EDTA) in aqueous solution. The crystallite size and crystalline phase showed no considerable change after modification, hence photocatalytic effect improvement of phosphate modified nano titania compared with the pure nano titania could be probably due to the existence of phosphate groups on the surface. The changes of the initial pH, photocatalyst dosage and EDTA concentration were tested in the degradation experiments. The pseudo-first-order kinetic model described the dynamic behavior for the photocatalytic degradation of EDTA using phosphate modified nano titania.

show abstract

Influence of Alkyl Chain Length on Phosphate Self-Assembled Monolayers

Cited by 215 publications

References 40 publications

Organic corrosion inhibitors: where are we now? A review. Part III. Passivation and the role of the chemical structure of organophosphates

Organic corrosion inhibitors: where are we now? A review. Part III. Passivation and the role of the chemical structure of organophosphates

Selective aluminum passivation for targeted immobilization of single DNA polymerase molecules in zero-mode waveguide nanostructures

Phosphate Modification of Nano Titania and Its Effect on the Photodegradation of EDTA

Contact Info

Product

Resources

About