Enhanced Copper Surface Protection in Aqueous Solutions Containing Short-Chain Alkanoic Acid Potassium Salts

Langmuir ◽  
2007 ◽  
Vol 23 (22) ◽  
pp. 11281-11288 ◽  
Author(s):  
Esta Abelev ◽  
David Starosvetsky ◽  
Yair Ein-Eli
Keyword(s):  
Aqueous Solutions ◽  
Copper Surface ◽  
Short Chain ◽  
Potassium Salts ◽  
Alkanoic Acid ◽  
Surface Protection

Phase diagrams of aqueous solutions of the potassium salts of malonic, succinic, and glutaric acids

2021 ◽  
pp. 106466
Author(s):  
Julia L. Roskam ◽  
Kristen L. Nowak ◽  
Karl T. Taylor ◽  
Samuel R. Rendler ◽  
Keith D. Beyer
Keyword(s):  
Aqueous Solutions ◽  
Phase Diagrams ◽  
Potassium Salts

scholarly journals XVII.—Electrolytic Synthesis of Dibasic Acids

1895 ◽  
Vol 37 (2) ◽  
pp. 361-379
Author(s):  
A. Crum Brown ◽  
James Walker
Keyword(s):  
Aqueous Solutions ◽  
Succinic Acid ◽  
Homologous Series ◽  
Side Chains ◽  
Potassium Salts ◽  
Concentrated Aqueous Solutions

In our former paper we described the results obtained by electrolysing concentrated aqueous solutions of the ethyl-potassium salts of normal saturated dibasic acids. The chief products were shown to be diethyl compound ethers of the same homologous series, and the formation of these compound ethers was shown to occur in accordance with the equation: 2C2H5·O·ĊO·R˝·CO·O- = C2H5·O·CO·R˝R˝CO·O·C2H5 + 2CO2. We now find that precisely similar results are obtained by electrolysing the corresponding compounds derived from saturated dibasic acids with side chains. We have thus been able to effect the synthesis of acids of the succinic acid series, in which hydrogen is symmetrically replaced by alcohol radicals of the form CnH2n+1.

60Co γ-radiolysis of oxygenated aqueous solutions of cysteine at pH 7

1970 ◽  
Vol 48 (3) ◽  
pp. 417-421 ◽  
Author(s):  
J. E. Packer ◽  
R. V. Winchester
Keyword(s):  
Hydrogen Peroxide ◽  
Aqueous Solutions ◽  
Short Chain ◽  
Thiyl Radical ◽  
Reaction Paths ◽  
Chain Reactions

In the radiolysis of oxygenated aqueous solutions of cysteine (RSH) at pH 7, short chain reactions occur yielding cystine (RSSR) and hydrogen peroxide. Two competing reaction paths involving reaction of the thiyl radical (RS•) with oxygen or thiol anion (RS−) are postulated to explain the results.

Chelation as a strategy to reinforce cationic copper surface protection in acidic solutions

RSC Advances ◽  
2016 ◽  
Vol 6 (72) ◽  
pp. 68351-68356 ◽  
Author(s):  
Liang Cai ◽  
Xue-Qing Feng ◽  
Xin Hua ◽  
Xiao-Peng He ◽  
Yi-Tao Long ◽  
...  
Keyword(s):  
Corrosion Inhibitors ◽  
Copper Surface ◽  
Copper Surfaces ◽  
Surface Protection ◽  
Acidic Solutions ◽  
Promising Strategy

Surface chelation has been demonstrated to be a promising strategy to address repulsion between protonated corrosion inhibitors and ionized copper surfaces in acids.

N.M.R. spectra of 'p-nitrosophenol' and its methyl derivatives

1966 ◽  
Vol 19 (5) ◽  
pp. 841 ◽  
Author(s):  
RK Norris ◽  
S Sternhell
Keyword(s):  
Aqueous Solutions ◽  
Long Range ◽  
Organic Solvents ◽  
Negative Charge ◽  
Spin Coupling ◽  
Potassium Salts ◽  
Methyl Derivatives ◽  
Spin Spin Coupling

On the basis of N.M.R. spectra, supported by u.v. and i.r. data, it can be concluded that "p-nitrosophenol" and several of its methyl derivatives exist predominantly in the benzoquinone monoxime form in organic solvents and that in aqueous solutions the corresponding potassium salts have the negative charge largely on the oxime oxygen. The protons on the α-carbon syn to the quinone monoxime hydroxyl are deshielded with respect to the anti protons but this relationship appears to be reversed in the anions. The N.M.R. spectra of some p-nitrosoanisoles and quinone monoxime methyl ethers are given and syn-anti equilibria and long-range spin-spin coupling are discussed.

scholarly journals (401) Broadleaf Cilantro (Eryngium foetidum) Growth as Affected by Selected Organic Biostimulants

HortScience ◽  
2005 ◽  
Vol 40 (4) ◽  
pp. 1062B-1062 ◽  
Author(s):  
J. Pablo Morales-Payan ◽  
William M. Stall
Keyword(s):  
Amino Acids ◽  
Aqueous Solutions ◽  
Leaf Area ◽  
Ascophyllum Nodosum ◽  
Animal Tissue ◽  
Short Chain ◽  
Siberian Fir ◽  
Abies Sibirica ◽  
Eryngium Foetidum ◽  
Shoot Weight

Experiments were conducted to determine the effects of a Siberian fir (Abies sibirica) extract rich in triterpenic acid (TTA), a seaweed (Ascophyllum nodosum) extract with cytokinin-like activity (CSE), and a mixture of amino acids and short-chain peptides from fermented animal tissue (APC) on broadleaf cilantro (Eryngiumfoetidum) shoot weight and leaf area. Aqueous solutions of CSE, TTA, and APC at various rates were applied individually on the broadleaf cilantro leaves 15 and 30 days after transplanting. Broadleaf cilantro leaf area and shoot fresh and dry weights were determined after harvest (60 days after transplanting). APC, TTA, and CSE significantly increased broadleaf cilantro shoot weights and leaf area as compared to control plants. Aqueous solutions of APC at the rate of 900 g·L-1, CSE at the rate of 50 mg·L-1, and TTA at the rate of 300 mg·L-1 resulted in the highest broadleaf cilantro shoot weights.

scholarly journals Comparison between surface and volumetric properties of short-chain alcohols and some classical surfactants

2016 ◽  
Vol 71 (1) ◽  
pp. 1 ◽  
Author(s):  
Magdalena Bielawska ◽  
Anna Zdziennicka ◽  
Bronisław Jańczuk
Keyword(s):  
Free Energy ◽  
Aqueous Solutions ◽  
Chemical Potential ◽  
Standard Free Energy ◽  
Dynamic Surface Tension ◽  
Short Chain ◽  
Critical Aggregation Concentration ◽  
Free Energy Of Adsorption ◽  
Dynamic Surface ◽  
Air Interface

<p>Measurements of the dynamic surface tension of the aqueous solutions of methanol, ethanol, propanol, CTAB and SDDS at their given concentrations were made. From the obtained results and the literature data it was concluded that the adsorption of short-chain alcohols at the water-air interface is somewhat similar to that of classical surfactants. For that reason the relationship between the Gibbs standard free energy of adsorption of short-chain alcohols and classical surfactants at that interface was established. The correlation between the chemical potential of mixing of alcohols and surfactants was also analysed. This analysis concerned the critical aggregation concentration (CAC) of alcohols and the critical micelle concentration (CMC) of surfactants. The chemical potential of surfactant mixing was calculated from the literature CMC data for the homologous series of alkyl sulfates, alkyl sulfonates, alkyl ammonium chlorides, alkyl trimethylammonium bromides, and alkyl pyridinium bromides. The influence of the hydrophobic chain length of alcohol and surfactant molecules on the Gibbs standard free energy of their adsorption at the water-air interface and their chemical potential of mixing were considered. It appeared that there is a linear dependence between these thermodynamic functions and the number of carbon atoms increased by 1 in the hydrocarbon chains of these compounds. This confirms clearly our conclusion that the behaviour of short-chain alcohols and classical surfactants at the water-air interface and in the bulk phase of aqueous solutions is similar. </p>

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