Use of Selective Redox Cross-Inhibitors for the Control of Organic Layer Formation Obtained via Diazonium Salt Reduction

Langmuir ◽  
2019 ◽  
Vol 35 (34) ◽  
pp. 11048-11055 ◽  
Author(s):  
Isidoro López ◽  
Sylvie Dabos-Seignon ◽  
Tony Breton
Keyword(s):  
Diazonium Salt ◽  
Organic Layer ◽  
Layer Formation ◽  
Salt Reduction

scholarly journals Tuning the Covering on Gold Surfaces by Grafting Amino-Aryl Films Functionalized with Fe(II) Phthalocyanine: Performance on the Electrocatalysis of Oxygen Reduction

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1631
Author(s):  
Camila F. Olguín ◽  
Nicolás Agurto ◽  
Carlos P. Silva ◽  
Carolina P. Candia ◽  
Mireya Santander-Nelli ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Diazonium Salt ◽  
Gold Surface ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Salt Reduction ◽  
Surface Electrodes ◽  
Custom Made ◽  
Aryl Diazonium Salt ◽  
Inorganic Molecules

Current selective modification methods, coupled with functionalization through organic or inorganic molecules, are crucial for designing and constructing custom-made molecular materials that act as electroactive interfaces. A versatile method for derivatizing surfaces is through an aryl diazonium salt reduction reaction (DSRR). A prominent feature of this strategy is that it can be carried out on various materials. Using the DSRR, we modified gold surface electrodes with 4-aminebenzene from 4-nitrobenzenediazonium tetrafluoroborate (NBTF), regulating the deposited mass of the aryl film to achieve covering control on the electrode surface. We got different degrees of covering: monolayer, intermediate, and multilayer. Afterwards, the ArNO2 end groups were electrochemically reduced to ArNH2 and functionalized with Fe(II)-Phthalocyanine to study the catalytic performance for the oxygen reduction reaction (ORR). The thickness of the electrode covering determines its response in front of ORR. Interestingly, the experimental results showed that an intermediate covering film presents a better electrocatalytic response for ORR, driving the reaction by a four-electron pathway.

scholarly journals The convenient preparation of stable aryl-coated zerovalent iron nanoparticles

2015 ◽  
Vol 6 ◽  
pp. 1192-1198 ◽  
Author(s):  
Olga A Guselnikova ◽  
Andrey I Galanov ◽  
Anton K Gutakovskii ◽  
Pavel S Postnikov
Keyword(s):  
Iron Nanoparticles ◽  
Diazonium Salt ◽  
Chemical Reduction ◽  
Water Soluble ◽  
Zerovalent Iron ◽  
Iron Core ◽  
Organic Layer ◽  
Aryl Group ◽  
Surface Modified

A novel approach for the in situ synthesis of zerovalent aryl-coated iron nanoparticles (NPs) based on diazonium salt chemistry is proposed. Surface-modified zerovalent iron NPs (ZVI NPs) were prepared by simple chemical reduction of iron(III) chloride aqueous solution followed by in situ modification using water soluble arenediazonium tosylate. The resulting NPs, with average iron core diameter of 21 nm, were coated with a 10 nm thick organic layer to provide long-term protection in air for the highly reactive zerovalent iron core up to 180 °C. The surface-modified iron NPs possess a high grafting density of the aryl group on the NPs surface of 1.23 mmol/g. FTIR spectroscopy, XRD, HRTEM, TGA/DTA, and elemental analysis were performed in order to characterize the resulting material.

Synthesis of 4-aminobenzenesulfonic acid functionalized carbon catalyst through diazonium salt reduction for biodiesel production

2018 ◽  
Vol 173 ◽  
pp. 753-762 ◽  
Author(s):  
Shengli Niu ◽  
Hewei Yu ◽  
Yilin Ning ◽  
Xincheng Tang ◽  
Xiangyu Zhang ◽  
...  
Keyword(s):  
Diazonium Salt ◽  
Biodiesel Production ◽  
Carbon Catalyst ◽  
Salt Reduction

Derivatization and characterization of functionalized carbon powder via diazonium salt reduction

2008 ◽  
Vol 12 (11) ◽  
pp. 1411-1419 ◽  
Author(s):  
Malingappa Pandurangappa ◽  
Thippeswamy Ramakrishnappa
Keyword(s):  
Diazonium Salt ◽  
Carbon Powder ◽  
Salt Reduction

Spontaneous Grafting of Nitrophenyl Groups on Carbon: Effect of Radical Scavenger on Organic Layer Formation

Langmuir ◽  
2014 ◽  
Vol 30 (26) ◽  
pp. 7913-7918 ◽  
Author(s):  
Thibaud Menanteau ◽  
Eric Levillain ◽  
Tony Breton
Keyword(s):  
Radical Scavenger ◽  
Organic Layer ◽  
Layer Formation

scholarly journals Organic layer formation and sorption of U(vi) on acetamide diethylphosphonate-functionalized mesoporous silica

2017 ◽  
Vol 46 (16) ◽  
pp. 5441-5456 ◽  
Author(s):  
Eva C. Uribe ◽  
Harris E. Mason ◽  
Jennifer A. Shusterman ◽  
Wayne W. Lukens
Keyword(s):  
Molecular Structure ◽  
Solid State ◽  
Mesoporous Silica ◽  
Solid State Nmr ◽  
Organic Layer ◽  
Layer Formation ◽  
Functionalized Mesoporous Silica ◽  
Extraction Properties

Solid-state NMR is used to connect the molecular structure of acetamide phosphonate-functionalized mesoporous silica with its macroscopic U(vi) extraction properties.

Kinetics of compact layer formation and growth of 1,10-phenanthroline at the electrode surface

1990 ◽  
Vol 87 ◽  
pp. 1597-1607 ◽  
Author(s):  
L Benedetti ◽  
M Borsari ◽  
C Fontanesi ◽  
G Battistuzzi Gavioli
Keyword(s):  
Electrode Surface ◽  
Layer Formation ◽  
Compact Layer ◽  
Kinetics Of

EINE CHEMISCHE METHODE ZUR BESTIMMUNG VON 16-EPI-ÖSTRIOL IM URIN DES MENSCHEN

1963 ◽  
Vol 44 (1) ◽  
pp. 47-66 ◽  
Author(s):  
W. Nocke ◽  
H. Breuer
Keyword(s):  
Melting Point ◽  
Phosphoric Acid ◽  
Aqueous Alkali ◽  
Percentage Error ◽  
Organic Layer ◽  
Maximum Percentage ◽  
Chemical Determination ◽  
Routine Assay ◽  
Hydrolysis Of

ABSTRACT A method for the chemical determination of 16-epi-oestriol in the urine of nonpregnant women with a qualitative sensitivity of less than 0.5 μg/24 h is described. The separation of 16-epi-oestriol and oestriol is accomplished by converting 16-epi-oestriol into its acetonide, a reaction which is stereoselective for cis-glycols and therefore not undergone by oestriol as a trans-glycol. Following partition between chloroform and aqueous alkali, the acetonide of 16-epi-oestriol is completely separated with the organic layer whereas oestriol as a strong phenol remains in the alkaline phase. 16-epi-oestriol is chromatographed on alumina as the acetonide and determined as a Kober chromogen. This procedure can easily be incorporated into the method of Brown et al. (1957 b) thus making possible the simultaneous routine assay of oestradiol-17β, oestrone, oestriol and 16-epi-oestriol from one sample of urine. The specificity of the method was established by separation of 16-epi-oestriol from nonpregnancy urine as the acetonide, hydrolysis of the acetonide by phosphoric acid, isolation of the free compound by microsublimation and identification by micro melting point, colour reactions and chromatography. The accuracy of the method is given by a mean recovery of 64% for pure crystalline 16-epi-oestriol when added to hydrolysed urine in 5–10 μg amounts. The precision is given by s = 0.24 μg/24 h. For the duplicate determination of 16-epi-oestriol the qualitative sensitivity is 0.44 μg/24 h, the maximum percentage error being ± 100% The quantitative sensitivity (±25% error) is 1.7 μg/24 h.

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