Month: December 2022

Xi, Hancheng published the artcileSterically hindered diarylethenes with thienopyridine: Substituent position effect on photochromic properties, Computed Properties of 22483-09-6, the main research area is photochromism sterically hindered diarylethenes thienopyridine NMR; substituent effect photochromism sterically hindered diarylethenes thienopyridine.

Diarylethenes (DAEs) have recently attracted great attention for their applications in light-responsive materials. As much efforts have been directed towards the elucidation of the structure-property relationship of DAE derivatives, improving photochromic performances through structure optimization is still worthy of study. Herein, three isomeric diarylethenes with thienopyridine units are designed for gaining insights into substituent position effect on photochromic performances. It is shown that the nitrogen atom in pyridine rings shows influence on the photochromic behaviors, such as photoreaction quantum yields, conversion ratios of target systems. Distinctively, thieno [3,2-b]pyridine-containing I (TP3) displays a novel solvent-dependent photochromic activity. And the photochromic reactivity of thieno [2,3-b]pyridine-containing II (TP1) can be specifically blocked by Cu2+, showing the gated photochromism. The diverse photochromic properties make the target systems promising candidates for the development of practical mol. devices with certain functions.

Dyes and Pigments published new progress about Conformation. 22483-09-6 belongs to class alcohols-buliding-blocks, name is 2,2-Dimethoxyethanamine, and the molecular formula is C4H11NO2, Computed Properties of 22483-09-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kaminsky, Jakub published the artcileDouble Hydrogen Bonding Dimerization Propensity of Aqueous Hydroxy Acids Investigated Using Vibrational Optical Activity, Application of (S)-2-hydroxysuccinic acid, the main research area is double hydrogen bonding dimerization hydroxy acid vibrational optical activity.

Lactic and malic acids are key substances in a number of biochem. processes in living cells and are also utilized in industry. Vibrational spectroscopy represents an efficient and sensitive way to study their structure and interactions. Since water is the natural environment, proper understanding of their mol. dynamics in aqueous solutions is of critical importance. To this end, we employed Raman spectroscopy and Raman optical activity (ROA) to study the conformation of L-lactic and L-malic acids in water (while varying pH, temperature, and concentration), with special emphasis on their double hydrogen bonding dimerization propensity. Raman and ROA exptl. data were supported by extensive theor. calculations of the vibrational properties and by addnl. experiments (IR absorption, vibrational CD, and NMR). Conformational behavior of the acids in water was described by mol. dynamics simulations. Reliability of the results was verified by calculating the vibrational properties of populated conformers and by comparing thus obtained spectral features with the exptl. data. Calculations estimated the incidence of H-bonded dimers in water to be low in lactic acid and comparable to monomers in malic acid. The “”hybrid”” approach presented here reveals limitations of relying on the exptl. spectra alone to study dimer formation.

Journal of Physical Chemistry B published new progress about Conformation. 97-67-6 belongs to class alcohols-buliding-blocks, name is (S)-2-hydroxysuccinic acid, and the molecular formula is C4H6O5, Application of (S)-2-hydroxysuccinic acid.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Gerbst, Alexey G. published the artcileDriving Force of the Pyranoside-into-Furanoside Rearrangement, Formula: C9H16O6, the main research area is pyranoside furanoside rearrangement.

Ab initio calculations of fully O-sulfated model monosaccharides, including common hexoses (glucose, galactose, fucose, and mannose) and pentoses (arabinose and xylose), were performed to study the energetic properties of the recently discovered pyranoside-into-furanoside (PIF) rearrangement. It was shown that the per-O-sulfated derivatives of furanoside isomers generally had lower energies than the corresponding per-O-sulfated pyranosides, while nonsulfated furanosides were always less favored than nonsulfated pyranosides. Mannose, which is known to be unreactive in PIF rearrangement, was the only exception. The results of the theor. calculations were confirmed by exptl. studies of monosaccharide models and explained the driving force of such unusual ring contraction process as PIF rearrangement. The conclusions of performed investigation can be used for prediction of new substrates applicability for PIF rearrangement.

ACS Omega published new progress about Conformation. 2595-07-5 belongs to class alcohols-buliding-blocks, name is (2R,3R,4S,5R,6R)-2-(Allyloxy)-6-(hydroxymethyl)tetrahydro-2H-pyran-3,4,5-triol, and the molecular formula is C9H16O6, Formula: C9H16O6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Wei, Zheng published the artcileExtraction and separation performance of rhenium(VII) and uranium(VI) from nitric acid medium using N,N’-dimethyl-N,N’-dioctyldiglycolamide, Name: n-Octanol, the main research area is rhenium uranium ion extraction separation dimethyldioctyldiglycolamide complexation aqueous nitrate.

The extraction and separation of Re(VII) and U(VI) from the nitric acid medium were studied in which an asym. diglycolamide, N,N’-dimethyl-N,N’-dioctyldiglycolamide (DMDODGA) was used as the extractant, and 40/60(volume/volume)% n-octanol/kerosine was used as the diluent. The effects of the concentration of the aqueous HNO3, the initial metal ion and the extractant on the distribution ratios (DRe and DU) and the separation factor (βU/Re) are discussed. Formation of the 1:1 and 1:2 Re/DODMDGA and 1:1 U/DMDODGA complexes were also analyzed using the slope anal. method. Besides, βU/Re increases as the aqueous HNO3 concentration increases.

Journal of Radioanalytical and Nuclear Chemistry published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Sukhbaatar, Tamir published the artcileProbing the existence of uranyl trisulfate structures in the AMEX solvent extraction process, Name: n-Octanol, the main research area is AMEX solvent extraction uranyl sulfuric medium EXAFS MD simulation.

Knowledge of the complexe microstructure in solvent extraction phases is mandatory for full comprehension of ionic separation Coupling MD simulations and EXAFS for uranyl extraction in sulfuric media with tertiary amine extractants allowed unravelling the unprecedented uranyl three sulfate structure.

Chemical Communications (Cambridge, United Kingdom) published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Name: n-Octanol.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Baldoneschi, Veronica published the artcileActive-Site Targeting Paramagnetic Probe for Matrix Metalloproteinases, Application In Synthesis of 87905-98-4, the main research area is ytterbium lanthanum complex paramagnetism active site matrix metalloproteinase MMP12; DOTA; inhibitors; lanthanides; metalloproteins; molecular probes.

The design and synthesis of the Ln3+ complexes of a DOTA-containing (DOTA = 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetic acid) inhibitor of matrix metalloproteinases are reported. The tight binding of the sulfonamide scaffold to the catalytic domain of the investigated matrix metalloproteinase is not impaired by the presence of the Ln3+-DOTA moiety. The paramagnetic properties of the Ln3+ complex are exploited to obtain insights into the structural features of the ligand-protein interactions and to evaluate the influence of the linker length on the quality of the paramagnetic restraints.

ChemPlusChem published new progress about Complexation. 87905-98-4 belongs to class alcohols-buliding-blocks, name is Benzyl (5-hydroxypentyl)carbamate, and the molecular formula is C13H19NO3, Application In Synthesis of 87905-98-4.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Kim, Seong-Yun published the artcileSelective Separation of Trivalent Europium(III) from Americium(III) using N,N’-Dimethyl-N,N’-di-2-phenylethyl-diglycol Amide (MPEDGA) Extractant in Ionic Liquid, HPLC of Formula: 110-99-6, the main research area is americium europium dimethyl diphenylethyl diglycol amide IL extractant separation.

A diglycolamide based N,N”-Dimethyl-N,N”-di-2-phenylethyl-diglycol amide (MPEDGA) extractant was synthesized and dissolved into 1-butyl-3-methylimidazolium nonafluorobutanesulfonate ([C4mim][NfO]) to prepare the extraction phase. Its separation performance of Am-241 with Eu-152 in nitric acid solution was investigated. The extraction kinetics were fast and could reach equilibrium within 15 min. When [HNO3] = 0.1 M, the maximum SFEu-152/Am-241 was obtained as 124. Moreover, with increase in the concentration of HNO3, the extraction ability decreased gradually, and SFEu-152/Am-241 decreased as 3 when [HNO3] reached 4 M. Back extraction was successfully completed by using 1 M guanidine carbonate with 0.5 M EDTA or 1 M guanidine carbonate with 0.5 M diethylenetriaminepentaacetic acid (DTPA), resp. Slope anal. revealed a 1:3 complex was formed. Effect of temperature further clarified the extraction process was exothermic.

Solvent Extraction Research and Development, Japan published new progress about Complexation. 110-99-6 belongs to class alcohols-buliding-blocks, name is 2,2′-Oxydiacetic acid, and the molecular formula is C4H6O5, HPLC of Formula: 110-99-6.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Joshi, Nishant published the artcileReactive Extraction of Gallic Acid Using Tributyl Phosphate in Different Classes of Diluents, Related Products of alcohols-buliding-blocks, the main research area is reactive extraction gallic acid tributyl phosphate diluent octanol toluene; ethyl acetate hexane diluent reactive extraction gallic acid TBP.

Gallic acid is an important carboxylic acid used in pharmaceutical industries owing to its medicinal properties. The separation of gallic acid from fermentation broth and dilute aqueous streams is a challenging task. Therefore, in the present study the reactive extraction of gallic acid from an aqueous solution by using tri-Bu phosphate in octanol, Et acetate, n-hexane, and toluene as diluents, resp., has been carried out at constant temperature (303 ± 1 K). The results were compared with those of the extraction using pure diluents in order to compute the intensification of extraction obtained. Experiments were performed to investigate the effect of initial acid concentration, extractant concentration, and diluent type. TBP + hexane was found to be most suitable solvent system resulting in the highest distribution coefficient (KD = 24) when TBP was employed at a concentration of 1.516 mol·kg-1. The equilibrium complexation constant (KE) was observed to be in the ranges of 3.18-8.8 for n-hexane, 0.91-4.54 for toluene, 2.295-4.546 for Et acetate, and 3.57-6.17 for octanol.

Journal of Chemical & Engineering Data published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, Related Products of alcohols-buliding-blocks.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Burns, Jonathan D. published the artcileAstatine partitioning between nitric acid and conventional solvents: indication of covalency in ketone complexation of AtO+, SDS of cas: 111-87-5, the main research area is astatine partitioning nitrate conventional solvent covalency ketone complexation.

Astatine-211 has been produced at Texas A&M University on the K150 cyclotron, with a yield of 890 ± 80 MBq through the 209Bi(α,2n)211At reaction via an 8 h bombardment with a beam current of 4-8 μA and an α-particle beam energy of 28.8 MeV. The target was then dissolved in HNO3 and the extraction of 211At was investigated into a variety of organic solvents in 1-3 M HNO3. Extraction of 211At with distribution ratios as high as 11.3 ± 0.6, 12.3 ± 0.8, 42.2 ± 2.2, 69 ± 4, and 95 ± 6 were observed for diisopropyl ether, 1-decanol, 1-octanol, 3-octanone, and Me iso-Bu ketone, resp., while the distribution ratios for 207Bi were â‰?.05 in all cases. The extraction of 211At into both Me iso-Bu ketone and 3-octanone showed a strong, linear dependence on the HNO3 initial aqueous concentration and better extraction than other solvents. DFT calculations show stronger binding between the carbonyl oxygen of the ketone and the At metal center.

Chemical Communications (Cambridge, United Kingdom) published new progress about Complexation. 111-87-5 belongs to class alcohols-buliding-blocks, name is n-Octanol, and the molecular formula is C8H18O, SDS of cas: 111-87-5.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts

Lengyel, M. published the artcileStudy on process parameters and optimization of microencapsulation based on phase separation, Quality Control of 64519-82-0, the main research area is microencapsulation phase separation nonionic surfactant; Calcium alginate; Freeze-drying; Isomalt; Microcomputer tomography; Microparticle structure analysis; Reconstitution.

As surfactants are capable of influencing the droplet formation, our study primarily aims the investigation of the effect of a nonionic surfactant e.g. Polysorbate 80 on the formation of microspheres on the course of vibrating nozzle method with coacervation. The experiments also concern the impact of the different process parameters (e.g. vibration frequency, feed rate and voltage) on the shape and size distribution of microspheres characterized by laser diffraction size determination completed with particle image anal. The calcium-alginate microspheres were processed using freeze-drying to ensure solid state with better drug carrier capability. Addition of isomalt was advantageous in the formation of freeze-dried microspheres at low alginate concentration, which was explained by micro-CT anal. of the constructed particle structure. The internal three-dimensional network of calcium alginate demonstrated a more cancellous architecture ameliorating the roundness of microparticles.

European Journal of Pharmaceutical Sciences published new progress about Coacervation. 64519-82-0 belongs to class alcohols-buliding-blocks, name is (3R,4R,5R)-6-(((2S,3R,4S,5S,6R)-3,4,5-Trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)hexane-1,2,3,4,5-pentaol, and the molecular formula is C12H24O11, Quality Control of 64519-82-0.

Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts