Month: December 2022

Gu, Feng published the artcileFundamental study on the recovery of gadolinium gallium garnet from slicing dust [generated in wafer manufacture] by flotation, Quality Control of 2016-56-0, the publication is Shigen to Sozai (1991), 107(5), 289-93, database is CAplus.

The separation of Gd Ga garnet (GGG) from green carborundum (GC) by flotation was investigated. GGG was selectively floated from GC by using dodecylammonium acetate as a collector, H₂SO₄ or H₃PO₄ as an activator for GGG, and starch as a depressor for GC. The activation of GGG with H₂SO₄ is caused by the specific adsorption of sulfate ion and by the chem. interaction between sulfate ion and dodecylammonium ion on the GGG surface.

Shigen to Sozai published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Quality Control of 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Gu, Feng published the artcileFundamental study on the recovery of lithium niobate from slicing dust by flotation method, Recommanded Product: Dodecylamineacetate, the publication is Shigen to Sozai (1992), 108(8), 611-15, database is CAplus.

Favorable effects of fluoride ion and corn starch for the dodecyl ammonium acetate (DAA) flotation process of slicing dust containing lithium niobate (LN), with sp. surface area 18,000 cm²/g and green carborundum (GC) with 5900 cm²/g, were determined Zeta potential and flotation recoveries of LN and GC with and without of KF are presented as a function of pH. LN dissolution and DAA adsorption on LN are given. The best separation can be obtained under the concentrations DAA 3 ¡Á 10^-4, KF 2 ¡Á 10^-2 mol/dm³, corn starch 25 mg/dm³, and pH ? 4.

Shigen to Sozai published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, Recommanded Product: Dodecylamineacetate.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Gu, Feng published the artcileRecovery of yttrium aluminum garnet from rock powder by flotation method, HPLC of Formula: 2016-56-0, the publication is Shigen to Sozai (1992), 108(10), 713-17, database is CAplus.

YAG (Y-Al garnet) dust was recovered from the rock powder containing green carborundum (GC) by flotation process using dodecyl ammonium acetate (DAA) as a cationic collector, or Aero Promoter 845# (Mitsue Cyanamide Co.) as an anionic collector. A 5-g powder mixture (YAG(sp. surface area 2.20 m²/g)/GC(0.59 m²/g) = 1/4) was studied using a 200 cm³ Denver flotation tester under the routine operating conditions described previously (CF: F.Gu, I. Matsuoka, and M. Mamiya 1991). Influences of collector, acid (activator, pH), and depressor concentrations on zeta potentials and flotation recoveries of YAG and GC are presented and discussed. About 90% recovery of YAG can be obtained by 3 ¡Á 10^-4 mol/dm³ concentration of DAA, 20 mg/dm³ corn starch as a depressor for GC, and 10^-1 mol/dm³ H₂SO₄ or H₂C₂O₄ as an activator. The oxalic acid is favorable with respect to high-grade flux. The AP845# was absorbed preferentially on the YAG surface, and can be used as an effective collector at 1.5 ¡Á 10^-5 mol/dm³ and pH 1.5 ? 2.5, and 90% recovery was attained by 5 mg/dm³ corn starch and 4 mg/dm³ ¦Á-terpinol.

Shigen to Sozai published new progress about 2016-56-0. 2016-56-0 belongs to catalysis-chemistry, auxiliary class Active Esterification, name is Dodecylamineacetate, and the molecular formula is C14H31NO2, HPLC of Formula: 2016-56-0.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Mukaiyama, Teruaki published the artcileCatalytic oxidation of various alcohols to the corresponding carbonyl compounds with N-chlorosuccinimide using a catalytic amount of sulfenamide, Name: N-(tert-Butyl)-S-phenylthiohydroxylamine, the publication is Chemistry Letters (2001), 846-847, database is CAplus.

Various primary and secondary alcs. were smoothly oxidized to the corresponding carbonyl compounds with N-chlorosuccinimide by using a catalytic amount of N-tert-butylbenzenesulfenamide in the co-existence of K₂CO₃ and mol. sieves 4A.

Chemistry Letters published new progress about 19117-31-8. 19117-31-8 belongs to catalysis-chemistry, auxiliary class Oxidant, name is N-(tert-Butyl)-S-phenylthiohydroxylamine, and the molecular formula is C10H15NS, Name: N-(tert-Butyl)-S-phenylthiohydroxylamine.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Ito, Mikinao published the artcileSynthesis and reactions of mono- and dinuclear Ni(I) thiolate complexes, Name: 2,4,6-Triisopropylbenzenethiol, the publication is Inorganic Chemistry (2009), 48(5), 2215-2223, database is CAplus and MEDLINE.

Mononuclear and dinuclear nickel(I) thiolato-bridged complexes, [Ni(PPh₃)(¦Ì-SR)]₂ [1a,b, R = 2,4,6-triisopropylphenyl (Tip), 1-adamantyl (Ad)], [(DxpS)Ni(¦Ì-SDxp)Ni(PPh₃)] (2, Dxp = 2,2”,6,6”-tetramethyl-1,1′:3,1”-terphenyl-2′-yl), and [Ni(SDmp)(PPh₃)] (3, Dmp = 2,6-dimesitylphenyl), were prepared by reactions of a nickel(I) amide [Ni{N(SiMe₃)₂}(PPh₃)₂] with the corresponding thiols. The two nickel centers of 1a and 1b are equivalent, and are linked by two thiolato groups and a Ni-Ni bond, whereas the two inequivalent nickel centers of 2 are bridged by a SDxp thiolate, by ¦Ç²:¦Ç³-xylyl aromatic ring of the other SDxp ligand, and a Ni-Ni bond. A slightly bulkier m-terphenyl thiolate, ^–SDmp, prevents its nickel complex from forming a Ni-Ni bond, and the mononuclear nickel(I) center of 3 is bound to PPh₃ and ^–SDmp through interactions with the sulfur and a ¦Ç²-mesityl. The coordinatively unsaturated nickel(I) complex 3 is reactive, and its reaction with TEMPO (2,2,6,6-tetramethylpiperidine N-oxyl) generated diamagnetic [Ni(SDmp)(PPh₃)(O,N:¦Ç²-TEMPO)] (4). N-Heterocyclic carbenes, 1,3,4,5-tetramethyl-2-imidazolinylidene (IMe’) and 1,3-dimesityl-2-imidazolinylidene (IMes), also react with 3 to afford a dinuclear nickel(I) complex, [Ni(IMe’)(¦Ì-SDmp)]₂ (5), and a mononuclear nickel(I) complex, [Ni(SDmp)(IMes)] (6), resp. Reaction of 3 with 1 equiv of ^tBuNC afforded the dinuclear complex [Ni(CN^tBu)(¦Ì-SDmp)]₂ (7), whereas the analogous reaction with 1 equiv of CO resulted in a mixture of [Ni(PPh₃)₂(CO)₂] and [Ni(CO)(SDmp)₂(PPh₃)] (8).

Inorganic Chemistry published new progress about 22693-41-0. 22693-41-0 belongs to catalysis-chemistry, auxiliary class Other Functionalization Reagent, name is 2,4,6-Triisopropylbenzenethiol, and the molecular formula is C15H24S, Name: 2,4,6-Triisopropylbenzenethiol.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Hashidzume, Akihito published the artcileNMR and fluorescence studies of the self-association behavior of an amphiphilic polyanion bearing hydrocarbon and fluorocarbon hydrophobes, Product Details of C10H6F17N, the publication is Polymer (2011), 52(7), 1546-1553, database is CAplus.

The association behavior of the terpolymers of sodium 2-acrylamido-2-methylpropanesulfonate (NaAMPS), N-dodecylmethacrylamide (DodMAm), and N-(2-(perfluorooctyl)ethyl)methacrylamide (PFOEMAm) (A/H(x)/F(y)) and their reference copolymers of NaAMPS and PFOEMAm (A/F(y)) was characterized using ¹⁹F and ¹H NMR, steady state fluorescence, and dynamic light scattering techniques in water (or D₂O) containing 0.1 M NaCl. The terpolymers formed micelle-like aggregates where hydrophobic microdomains are formed by hydrophobic associations among the perfluorooctylethyl (PFOE) and dodecyl (Dod) groups, the PFOE group exhibiting a stronger tendency for interpolymer association than the Dod groups. A careful anal. of the characterization data led to a conclusion that the hydrophobic microdomain formed from the terpolymer is microscopically phase separated into the fluorocarbon phase and hydrocarbon phase.

Polymer published new progress about 30670-30-5. 30670-30-5 belongs to catalysis-chemistry, auxiliary class Polyfluoroalkanes, name is 3,3,4,4,5,5,6,6,7,7,8,8,9,9,10,10,10-Heptadecafluorodecan-1-amine, and the molecular formula is C10H6F17N, Product Details of C10H6F17N.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Sera, Yoichi published the artcileSweeping on a microchip: concentration profiles of the focused zone in micellar electrokinetic chromatography, COA of Formula: C18H15N3O3, the publication is Electrophoresis (2001), 22(16), 3509-3513, database is CAplus and MEDLINE.

Online sample concentration by sweeping was studied in microchip micellar electrokinetic chromatog. (MEKC), By changing the distance between the injection cross and the detection points, the profile of the concentration process and the diffusion process in sweeping was elucidated. Rhodamine B injected for 4 s was best concentrated by sweeping at 9.4 mm from the injection cross and the enhancement factor was 450. At the longer distance from this point the peak of Rhodamine B was broadened and diluted by diffusion. The diffusion constant of Rhodamine B calculated from the experiment was 5.7 ¡Á 10^-6 cm² s^-1. The mixture of rhodamine B, sulforhodamine B, and cresyl fast violet was concentrated by sweeping and separated by MEKC at the same time.

Electrophoresis published new progress about 10510-54-0. 10510-54-0 belongs to catalysis-chemistry, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Inhibitor,Inhibitor, name is 5,9-Diaminobenzo[a]phenoxazin-7-ium acetate, and the molecular formula is C5H8N2O, COA of Formula: C18H15N3O3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Trisovic, N. published the artcileMesomorphism of novel stilbene-based bent-core liquid crystals, Product Details of C8H7NO4, the publication is Liquid Crystals (2021), 48(7), 1054-1064, database is CAplus.

A series of asym. bent-core liquid crystals I (X = COO; Y = H, Cl), bearing the stilbene moiety in the side wing, was synthesized and characterised. Structural modifications of the non-stilbene wing resulted in formation of various mesophases. Compounds I (X = COO; Y = H) and I (X = COO; Y = Cl) with an ester linking group between the Ph rings in this wing have an enantiotropic non-polar smectic-type mesophase, while compound I (Y = H), incorporating the biphenyl moiety, has a ferroelec. SmC_aP_F phase. The mols. of I (Y = H) undergo photoisomerisation in solution under UV irradiation, while the mesophases are unstable and UV irradiation leads to irreversible changes. The mesophases of I (X = COO; Y = H) and I (X = COO; Y = Cl) do not show any electro-optical switching and polarisation current. Applying low frequency AC voltage on a planarly aligned film of compound I (Y = H), smectic domains grow, while the birefringence and an image flickering increase. The observed features of these compounds identify stilbene as an attractive moiety in the design of advanced materials based on bent-core mols.

Liquid Crystals published new progress about 104-03-0. 104-03-0 belongs to catalysis-chemistry, auxiliary class Nitro Compound,Carboxylic acid,Benzene, name is 4-Nitrophenylacetic acid, and the molecular formula is C10H7IN2, Product Details of C8H7NO4.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Rajesh, Mathur published the artcileMonomeric Nickel(II) Complexes with Tetradentate Bis(benzimidazole) Ligands; Synthesis, Spectral and ¹H and ¹³C NMR Studies, SDS of cas: 5411-14-3, the publication is Journal of Chemical Research, Synopses (1998), 506-507, 2062-2078, database is CAplus.

The tetradentate ligand 1,2-bis(2-benzimidazolyloxamethyl)benzene (BBB) was used to synthesize complexes [Ni(BBB)X₂] where X = Cl, NCS, NO₃ or OAc; ¹H and ¹³C NMR was used to assign the aliphatic and ring protons/carbons.

Journal of Chemical Research, Synopses published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, SDS of cas: 5411-14-3.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia

Rajesh published the artcileMonomeric Cu(II) complexes with tetradentate bis(benzimidazole) ligand; synthesis, EPR, spectral and electrochemical studies, Category: catalysis-chemistry, the publication is Polyhedron (1998), 17(16), 2607-2615, database is CAplus.

1:1 Copper(II) complexes Cu(L)X₂¡¤nH₂O (X = Cl^–, NO₃^–, OAc^– and HCOO^–) with the tetradentate ligand 1,2-bis(2-benzimidazolylmethoxy)benzene (L) were prepared X-band EPR spectra of the above complexes examined as a frozen DMSO/DMF solution indicate g_¡¬ > g_¡Í > 2.0 and show four or less than four g_¡¬ lines and a broadening of the g_¡Í component suggesting a lowered site symmetry for the copper(II) ion. The g_¡Í component of all the complexes show nitrogen superhyperfine structure. A clear five line pattern is found in the g_¡Í region with B_N ? 15G¡À1 for Cu(L)X₂¡¤nH₂O complexes indicating that two nitrogen from the benzimidazole ring are coordinated to the central Cu^II in the equatorial basal plane while the other two positions in the sphere are occupied by the anionic ligand (X). With ClO₄^– as the anion, the 1:2 complex [Cu(L)₂](ClO₄)₂ results. The X-band EPR spectra of [Cu(L)₂](ClO₄)₂ shows a clear nine line SHF structure on the g_¡Í component indicating the presence of four nitrogen atoms coordinated to the central Cu^II atom; this confirms the retention of two ligands around Cu^II in solution MO coefficients ¦Â₁ and ¦Â₁‘ were evaluated from the expression used by Manoharan and Rogers. The trends of ¦Â₁ and ¦Â₁‘ indicate increasing electron delocalization on nitrogen atom as the authors change the exogenous ligand from formate/acetate-chloride to nitrate. The covalency parameter, ¦Á², also was evaluated and reflects the decreasing trend of covalency in the order nitrate > chloride ¡Ý acetate > formate for complexes containing these ligands. This trend of order is in conformity with that obtained from MO coefficients All the complexes exhibit a visible band with ¦Ë_max in the 625-690 nm region in DMF, suggesting a distorted geometry for copper(II) ion in the present series of complexes. Cyclic voltammetric studies of copper(II) complexes reveal that the E_1/2 for the Cu^II/Cu^I couple shifts to most neg. value with HCOO^– and OAc^– anionic ligands implying that these anion stabilize the Cu^II state whereas E_1/2 data for NO₃^– reveals that this anion destabilizes the Cu^II state. A plot of visible band energy vs. E_1/2 shows that as the energy of the d_x2-y2 orbital decreases, an anodic shift in Cu^II ¡ú Cu^I reduction potential is observed

Polyhedron published new progress about 5411-14-3. 5411-14-3 belongs to catalysis-chemistry, auxiliary class Carboxylic acid,Benzene,Ether, name is 2,2-(1,2-Phenylenebis(oxy))diacetic acid, and the molecular formula is C10H10O6, Category: catalysis-chemistry.

Referemce:
https://courses.lumenlearning.com/boundless-chemistry/chapter/catalysis/,
Catalysis – Wikipedia