Tailored protective groups for surface immobilization of ruthenium dyes

2020 ◽  
Vol 49 (12) ◽  
pp. 3735-3742 ◽  
Author(s):  
Sebastian Amthor ◽  
Hanna Braun ◽  
Julius Gröne ◽  
Djawed Nauroozi ◽  
Timo Jacob ◽  
...  
Keyword(s):  
Phosphonic Acid ◽  
High Stability ◽  
Aqueous Media ◽  
Surface Immobilization ◽  
Silyl Ester ◽  
Protective Groups ◽  
Ruthenium Dyes ◽  
Initial Adsorption

Synthesis of a ruthenium based chromophore with a phosphonic acid silyl-ester is reported, which is immobilized onto a NiO surface showing fast initial adsorption, high stability towards desorption in aqueous media and enhanced DSC performance.

scholarly journals Adsorption Characteristics of Organic Dyes on Alumina Powder from Aqueous Solutions

1994 ◽  
Vol 11 (2) ◽  
pp. 95-104 ◽  
Author(s):  
M. Saleem ◽  
A. Afzal ◽  
T.M. Naeem ◽  
F. Mahmood
Keyword(s):  
Active Sites ◽  
Surface Coverage ◽  
Organic Dyes ◽  
Aqueous Media ◽  
Alumina Powder ◽  
Acid Orange ◽  
Heats Of Adsorption ◽  
Different Temperatures ◽  
Initial Adsorption ◽  
Adsorption Systems

Adsorption of industrially important dyes (Acid Red 88, Acid Orange 8 and Bismark Brown R) on alumina from aqueous media has been investigated as a function of shaking time, amount of adsorbent, concentration of adsorbate and temperature. It is noted that the adsorption of Acid Red 88, Acid Orange 8 and Bismark Brown R on alumina decreases with an increase in temperature. The results obtained show that the adsorption isotherms at different temperatures are S-type and obey the Freundlich type of adsorption equation. Isosteric heats of adsorption (qst) have also been calculated at different coverages from the adsorption isosters and have been interpreted. The qst values for all the adsorption systems decrease with increasing surface coverage indicating that the alumina used possessed a heterogeneous surface with sites of different activities. The results also indicate that initial adsorption, whether by chemical or physical means, occurs first on the most active sites and then, as the concentration of adsorbate is increased, on sites of lesser activity.

Phosphonic Acid Analogs of Carbohydrate Metabolites. IV. Synthesis of DL-Glyceraldehyde-3-phosphonic Acid

1973 ◽  
Vol 51 (1) ◽  
pp. 104-110 ◽  
Author(s):  
Erich Baer ◽  
Ranga Robinson
Keyword(s):  
Phosphoric Acid ◽  
Chemical Synthesis ◽  
Phosphonic Acid ◽  
Methylphosphonic Acid ◽  
Diethyl Ester ◽  
Acid Analog ◽  
Protective Groups ◽  
Carbohydrate Metabolites

A chemical synthesis of DL-glyceraldehyde-3-phosphonic acid, the phosphonic acid analog of DL-glyceraldehyde-3-phosphoric acid, is reported. It was obtained from dimer DL-glyceraldehyde by two procedures differing solely in their protective groups via the following intermediates. Procedure 1: 2,5-diiodomethyl-3,6-dimethoxy-1,4-dioxane → 2,5-bis(methylphosphonic acid diethyl ester)-3,6-dimethoxy-1,4-dioxane → 2,5-bis(methylphosphonic acid)-3,6-dimethoxy-1,4-dioxane → DL-glyceraldehyde-3-phosphonic acid. Procedure 2: 2,5-bis(p-toluenesulfonyloxymethyl)-3,6-dibenzoxy-l,4-dioxane → 2,5-diiodomethyl-3,6-dibenzoxy-l,4-dioxane → 2,5-bis(methylphosphonic acid diethyl ester)-3,6-dibenzoxy-l,4-dioxane → 2,5-bis(methylphosphonicacid)-3,6-dibenzoxy-1,4-dioxane → DL-glyceraldehyde-3-phosphonic acid.

Crystal Structure of Pyridoxal Amino Methyl Phosphonic Acid (PYRAMPA) and Its Stability Constants with Al3+

2013 ◽  
Vol 1 ◽  
pp. 194308921350703
Author(s):  
Yahia Z. Hamada ◽  
Wesley R. Harris ◽  
Nigam P. Rath
Keyword(s):  
Crystal Structure ◽  
Aqueous Solutions ◽  
Stability Constants ◽  
Phosphonic Acid ◽  
High Stability ◽  
Deionized Water ◽  
Multidentate Ligand ◽  
Green Materials ◽  
Living Organisms ◽  
Very High

The crystal structure of the newly synthesized ligand pyridoxal amino methyl phosphonic acid (PYRAMPA) from green materials in deionized water and methanol is presented. It took only two steps to prepare this new ligand. The ligands’ stability constants with Al3+ are also reported in aqueous solutions at 25 °C ± 0.1 °C. The ligand was introduced as part of our concerted efforts to identify and synthesize an orally effective aluminum sequestering agent due to the known toxic effect of aluminum in living organisms particularly humans. PYRAMPA is a multidentate ligand suitable to sequester aluminum with very high stability.

Phospholipids. XVIII. Synthesis of ethylene glycolphosphonic acid analogues of cephalins

1968 ◽  
Vol 46 (10) ◽  
pp. 1279-1283 ◽  
Author(s):  
Erich Baer ◽  
Hemendra Basu
Keyword(s):  
Fatty Acid ◽  
Phosphonic Acid ◽  
Significant Degree ◽  
Chain Fatty Acid ◽  
Reaction Products ◽  
Long Chain Fatty Acid ◽  
Ethylene Glycols ◽  
Protective Groups ◽  
New Type ◽  
Long Chain

The synthesis of ethylene glycolphosphonic acid analogues of cephalins is reported. Two methods for the preparation of several typical members of the new type of phosphonolipids, viz. myristoyl, palmitoyl, and stearoyl ethylene glycol-(2-aminoethyl)phosphonate are described in detail The compounds were obtained by phosphonylation of monoacyl ethylene glycols in the presence of triethylamine with either (2-phthalimidoethyl)phosphonic acid monochloride or (2-N,N-dibenzylaminoethyl)phosphonic acid monochloride (hydrochloride), and freeing the reaction products from their protective groups by hydrazinolysis or hydrogenolysis, respectively. The glycolphosphonocephalins with long-chain fatty acid substituents, in contrast to the corresponding glycolphosphonolecithins, are water-insoluble, show no hemolytic activity, and are not hydrolyzed by lecithinase C to any significant degree. They are hydrolyzed, however, by lecithinase C in the presence of sphingomyelin.

scholarly journals Biomass-Based Cellulose Functionalized by Phosphonic Acid with High Selectivity and Capacity for Capturing U(VI) in Aqueous Solution

2020 ◽  
Vol 10 (16) ◽  
pp. 5455
Author(s):  
Zhipeng Huo ◽  
Sheng Zhao ◽  
Jinxin Yi ◽  
Hong Zhang ◽  
Jiaxing Li
Keyword(s):  
Phosphonic Acid ◽  
Aqueous Media ◽  
Substrate Material ◽  
Batch Adsorption ◽  
Adsorption Model ◽  
Adsorption Selectivity ◽  
Synthesis Strategy ◽  
Pseudo Second Order ◽  
Phosphonic Acid Groups ◽  
Cellulose Adsorbent

Uranium could be released into the aquatic ecological environment through various sorts of nuclear-related procedures, which has high toxicity and carcinogenicity even with a trace amount. A novel phosphonic acid functionalized cellulose adsorbent (PVKAP) with a simple synthesis strategy is developed based on pumpkin vine cellulose (PVK) as the substrate material for efficient and selective capturing U(VI). Because of the strong coordination between phosphonic acid groups and U(VI), the adsorption efficiency and adsorption selectivity of modified cellulose to U(VI) are greatly improved. The adsorption behavior follows the Langmuir adsorption model and pseudo-second-order kinetics model. The maximum adsorption capacities (pH = 5, T = 293 K) of PVK and PVKAP obtained from Langmuir isotherm are 57.2 and 714.3 mg∙g−1, and the adsorption equilibrium are reached in 240 and 35 min, respectively. Additionally, PVKAP has a high adsorption selectivity which reached 70.36% for U(VI) in multi-ion condition, and recycling studies have shown that PVKAP has good recyclability. Furthermore, batch adsorption experiments and spectral analysis reveal that the efficient enrichment of U(VI) on PVKAP could mainly attribute to the inner layer complexation. Therefore, this environmentally friendly and simple route prepared PVKAP has good a potential application value for U(VI) enrichment in aqueous media related to nuclear waste.

Catalysis of the Cellulose-Cyclic Urea Reactions by Built-in Acid Groups

1971 ◽  
Vol 41 (8) ◽  
pp. 680-685 ◽  
Author(s):  
D. M. Perrier ◽  
R. R. Benerito
Keyword(s):  
Phosphonic Acid ◽  
Untreated Control ◽  
Sulfonic Acid ◽  
Aqueous Media ◽  
Strong Acid ◽  
Degree Of Substitution ◽  
Acid Form ◽  
Cure Process ◽  
Phosphonic Acid Groups ◽  
Sulfonic Acid Groups

Sulfonic acid groups in sulfonoethylated cottons act as built-in catalysts for the reaction of cotton with substituted cyclic ureas. The cotton in the acid form did not require an additional catalyst for its reaction in aqueous media with dimethylolethylene urea, dimethylolpropylene urea, dihydroxyethylene urea, and dimethyloldihydroxyethylene urea. The strong acid groups of SE-cotton were more effective than carboxylic or phosphonic acid groups of carboxymethylated and phosphonomethylated cottons of like degree of substitution with each urea. Only the dimethyloldihydroxyethylene urea was effective in a delayed-cure process which, compared to the untreated control and the SE-control, imparted improved wrinkle recovery properties.

Highly efficient and selective photocatalytic CO2 to CO conversion in aqueous solution

2020 ◽  
Vol 56 (27) ◽  
pp. 3851-3854 ◽  
Author(s):  
Xiaomin Chai ◽  
Hai-Hua Huang ◽  
Huiping Liu ◽  
Zhuofeng Ke ◽  
Wen-Wen Yong ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Photocatalytic Performance ◽  
Aqueous Media ◽  
Highly Efficient ◽  
Co Conversion

A Co-based complex displayed the highest photocatalytic performance for CO2 to CO conversion in aqueous media.

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