Chemistry of defluoridation by one-pot synthesized dicarboxylic acids mediated polyacrylamide–zirconium complex

2015 ◽  
Vol 262 ◽  
pp. 224-234 ◽  
Author(s):  
Subbaiah Muthu Prabhu ◽  
Sankaran Meenakshi
Keyword(s):  
Dicarboxylic Acids ◽  
Zirconium Complex ◽  
One Pot

scholarly journals Green resins from renewable resources

2021 ◽  
Author(s):  
Justin J. Kosalka
Keyword(s):  
Phenolic Compounds ◽  
High Resolution Mass Spectrometry ◽  
Dicarboxylic Acids ◽  
13C Nmr Spectroscopy ◽  
One Pot ◽  
1H And 13C Nmr ◽  
X Ray Crystallography ◽  
Naturally Occurring ◽  
One Step ◽  
Acid Catalyzed

This work was aimed at exploring bio-based materials for the purpose of toner production on an industrial scale. Polyester and polyether based resins were prepared in good yields from naturally occurring phenolic compounds with desired thermal and physical properties. Phenols with varying functionality such as guaiacol, eugenol and vanillin along with two synthetically produced phenolic compounds modelling the β-O-4 linkage found in softwood lignins were explored as suitable precursors to synthetic, "green", resins. Phenols were transformed into diols using glycerine carbonate and a base catalyzed reaction. Diols were then polymerized with dicarboxylic acids in an acid catalyzed, transesterfication, reaction. A novel, bio-based polyether was synthesized in one pot, one step polymerization using vanillin. Thermal properties ((Tg) and (Ts) of resulting resins were evaluated. Resulting compounds and polymers were characterized using 1H and 13C NMR spectroscopy, high resolution mass spectrometry, elemental analysis, X-ray crystallography, DSC and GPC.

scholarly journals New 1,2,3-Triazole Containing PolyestersviaClick Step-Growth Polymerization and Nanoparticles Made of Them

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Tengiz Kantaria ◽  
Temur Kantaria ◽  
Giorgi Titvinidze ◽  
Giuli Otinashvili ◽  
Nino Kupatadze ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sodium Azide ◽  
Dicarboxylic Acids ◽  
Solution Concentration ◽  
One Pot ◽  
Bromoacetic Acid ◽  
Aliphatic Polyesters ◽  
Step Growth ◽  
Step Growth Polymerization

High-molecular-weight AA-BB-type aliphatic polyesters were synthesizedviaCu(I)-catalyzed click step-growth polymerization (SGP) following a new synthetic strategy. The synthesis was performed between diyne and diazide monomers in an organic solvent as one pot process using three components and two stages. The dipropargyl esters of dicarboxylic acids (component 1) were used as diyne monomers, di-(bromoacetic acid)-alkylene diesters (component 2) were used as precursors of diazide monomers, and sodium azide (component 3) was used for generating diazide monomers. The SGP was carried out in two steps: at Step  1 dibromoacetates interacted with two moles of sodium azide resulting in diazide monomers which interacted in situ with diyne monomers at Step  2 in the presence of Cu(I) catalyst. A systematic study was done for optimizing the multiparameter click SGP in terms of the solvent, duration of both Step  1 and Step  2, solution concentration, catalyst concentration, catalyst and catalyst activator (ligand) nature, catalyst/ligand mole ratio, and temperature of both steps of the click SGP. As a result, high-molecular-weight (MWup to 74 kDa) elastic film-forming click polyesters were obtained. The new polymers were found suitable for fabricating biodegradable nanoparticles, which are promising as drug delivery containers in nanotherapy.

scholarly journals Homochiral BINOL-based macrocycles with π-electron-rich, electron-withdrawing or extended spacing units as receptors for C60

2014 ◽  
Vol 10 ◽  
pp. 1308-1316 ◽  
Author(s):  
Marco Caricato ◽  
Silvia Díez González ◽  
Idoia Arandia Ariño ◽  
Dario Pasini
Keyword(s):  
Dicarboxylic Acids ◽  
Spectroscopic Methods ◽  
Statistical Distributions ◽  
One Pot ◽  
Enantiomerically Pure ◽  
One Pot Synthesis ◽  
Axially Chiral ◽  
Aromatic Dicarboxylic Acids ◽  
The One ◽  
Cyclic Adducts

The “one-pot” synthesis of several homochiral macrocycles has been achieved by using π-electron-rich, electron-deficient or extended aromatic dicarboxylic acids in combination with an axially-chiral dibenzylic alcohol, derived from enantiomerically-pure BINOL. Two series of cyclic adducts with average molecular D 2 and D 3 molecular symmetries, respectively, have been isolated in pure forms. Their yields and selectivities deviate substantially from statistical distributions. NMR and CD spectroscopic methods are efficient and functional in order to highlight the variability of shapes of the covalent macrocyclic frameworks. The larger D 3 cyclic adducts exhibit recognition properties towards C60 in toluene solutions (up to log K a = 3.2) with variable stoichiometries and variable intensities of the charge-tranfer band upon complexation.

scholarly journals Green resins from renewable resources

2021 ◽  
Author(s):  
Justin J. Kosalka
Keyword(s):  
Phenolic Compounds ◽  
High Resolution Mass Spectrometry ◽  
Dicarboxylic Acids ◽  
13C Nmr Spectroscopy ◽  
One Pot ◽  
1H And 13C Nmr ◽  
X Ray Crystallography ◽  
Naturally Occurring ◽  
One Step ◽  
Acid Catalyzed

This work was aimed at exploring bio-based materials for the purpose of toner production on an industrial scale. Polyester and polyether based resins were prepared in good yields from naturally occurring phenolic compounds with desired thermal and physical properties. Phenols with varying functionality such as guaiacol, eugenol and vanillin along with two synthetically produced phenolic compounds modelling the β-O-4 linkage found in softwood lignins were explored as suitable precursors to synthetic, "green", resins. Phenols were transformed into diols using glycerine carbonate and a base catalyzed reaction. Diols were then polymerized with dicarboxylic acids in an acid catalyzed, transesterfication, reaction. A novel, bio-based polyether was synthesized in one pot, one step polymerization using vanillin. Thermal properties ((Tg) and (Ts) of resulting resins were evaluated. Resulting compounds and polymers were characterized using 1H and 13C NMR spectroscopy, high resolution mass spectrometry, elemental analysis, X-ray crystallography, DSC and GPC.

scholarly journals One-pot biocatalytic route from cycloalkanes to α,ω‐dicarboxylic acids by designed Escherichia coli consortia

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Fei Wang ◽  
Jing Zhao ◽  
Qian Li ◽  
Jun Yang ◽  
Renjie Li ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Industrial Process ◽  
Dicarboxylic Acids ◽  
Cascade Process ◽  
One Pot ◽  
Promising Alternative ◽  
E Coli ◽  
Cell Modules ◽  
Biocatalytic Process

Abstract Aliphatic α,ω‐dicarboxylic acids (DCAs) are a class of useful chemicals that are currently produced by energy-intensive, multistage chemical oxidations that are hazardous to the environment. Therefore, the development of environmentally friendly, safe, neutral routes to DCAs is important. We report an in vivo artificially designed biocatalytic cascade process for biotransformation of cycloalkanes to DCAs. To reduce protein expression burden and redox constraints caused by multi-enzyme expression in a single microbe, the biocatalytic pathway is divided into three basic Escherichia coli cell modules. The modules possess either redox-neutral or redox-regeneration systems and are combined to form E. coli consortia for use in biotransformations. The designed consortia of E. coli containing the modules efficiently convert cycloalkanes or cycloalkanols to DCAs without addition of exogenous coenzymes. Thus, this developed biocatalytic process provides a promising alternative to the current industrial process for manufacturing DCAs.

scholarly journals Synthesis and Excimer Formation Properties of Electroactive Polyamides Incorporated with 4,5-Diphenoxypyrene Units

Polymers ◽  
2022 ◽  
Vol 14 (2) ◽  
pp. 261
Author(s):  
Shih-Hsuan Chen ◽  
Huai-Sheng Chin ◽  
Yu-Ruei Kung
Keyword(s):  
Main Chain ◽  
Dicarboxylic Acids ◽  
Radical Cations ◽  
Excimer Emission ◽  
One Pot ◽  
Transparent Films ◽  
Good Solubility ◽  
Polymer Main Chain ◽  
Pendent Group ◽  
Excimer Formation

A new dietherpyrene-cored diamine monomer, namely, 4,5-bis(4-aminophenoxy)pyrene, was successful synthesized and formed a series of electroactive polyamides with an aryloxy linkage in a polymer main chain and bearing pyrene chromophore as a pendent group using conventional one-pot polycondensation reactions with commercial aromatic/aliphatic dicarboxylic acids. The resulting polyamides exhibited good solubility in polar organic solvents and, further, can be made into transparent films. They had appropriate levels of thermal stability with moderately high glass-transition values. The dilute NMP solutions of these polyamides exhibited pyrene characteristic fluorescence and also showed a remarkable additional excimer emission peak centered at 475 nm. Electrochemical studies of these polymer films showed that these polyamides have both p- and n-dopable states as a result of the formation of radical cations and anions of the electroactive pyrene moieties.

One-pot oxidative cleavage of cyclic olefins for the green synthesis of dicarboxylic acids in Pickering emulsions in the presence of acid phosphate additives

2020 ◽  
Vol 10 (19) ◽  
pp. 6723-6728
Author(s):  
Bingyu Yang ◽  
Grégory Douyère ◽  
Loïc Leclercq ◽  
Véronique Nardello-Rataj ◽  
Marc Pera-Titus
Keyword(s):  
Green Synthesis ◽  
Sulfonic Acid ◽  
Dicarboxylic Acids ◽  
Silica Particles ◽  
Oxidative Cleavage ◽  
Pickering Emulsions ◽  
Acid Phosphate ◽  
One Pot ◽  
Cyclic Olefins ◽  
Sulfonic Acid Groups

Dicarboxylic acids were prepared by the oxidative cleavage of cyclic alkenes by adsorbing dodecyltrimethylammonium phosphotungstate particles and silica particles functionalized with octadecyl chains and sulfonic acid groups at the W/O interface.

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