Tag: M.W=200-250

Torres-Filho, A. published the artcileMechanical Properties of Acrylate Networks Formed by Visible Laser-Induced Polymerization. 2. Control of the Mechanical Properties, Category: catalysis-chemistry, the publication is Chemistry of Materials (1995), 7(4), 744-53, database is CAplus.

The mech. properties of some acrylate networks formed by visible laser-induced polymerization were studied as a function of the initial mol. composition of the reacting mixture The study included, besides some changes in the monomer composition, the influence of the acidity of the medium when ionizable dyes were used as photoinitiators. It was also shown that the mech. strength of the network polymers can be significantly improved by the addition of inorganic fillers which have been surface treated with silane coupling agents containing polymerizable groups or by adding to the multifunctional acrylate monomers a solution containing a stronger performed polymer. It was further observed that some of the phys. properties of the parts formed may be anisotropic depending on the direction of laser scanning for photopolymer formation. The work also describes different attempts to obtain an elastomeric material by copolymerizing a flexible acrylated oligomer with the networking monomers.

Chemistry of Materials published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C6H8O6, Category: catalysis-chemistry.

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

Bi, Yubai published the artcileA Visible Light Initiating System for Free Radical Promoted Cationic Polymerization, Application In Synthesis of 2909-77-5, the publication is Macromolecules (1994), 27(14), 3683-93, database is CAplus.

A visible light initiator system (containing a xanthene dye, an aromatic amine, and a diaryliodonium salt) for the photoinduced cationic polymerization of epoxides is reported. The polymerization in the radicals generated from the visible-light absorber starts a chain process which, after oxidation of the formed radicals, produces a cationic chain initiating carbocation. The system can efficiently photoinitiate the polymerization of certain cyclic ethers at any wavelength of the visible spectrum depending on the dye’s absorption spectrum and its oxidation/reduction potentials. Epoxides do not polymerize in the absence of any of the 3 components or in the absence of light. Aromatic amines of low basicity containing ¦Á-Hs are the preferred coinitiators for the polymerization of cyclohexene oxide (I). Studies on photochem. reactions between each 2 of the 3 components demonstrate that both oxidative bleaching of the dye by the diaryliodonium salt and reductive bleaching by the aromatic amine contribute to ¦Á-amino radical formation. The radical formed can be easily oxidized into an ¦Á-aminocarbocation by an onium salt of proper potential. Characterization of the polymer formed from I indicates that all the xanthene dye and appreciable amounts of the aromatic amine are incorporated in the polymer. It is believed that the ¦Á-aminocarbocation initiates the ring opening cationic polymerization Dye mols. are incorporated into the polymer in chain-terminating processes.

Macromolecules published new progress about 2909-77-5. 2909-77-5 belongs to catalysis-chemistry, auxiliary class Amine,Benzene, name is 2,6-Diisopropyl-N,N-dimethylaniline, and the molecular formula is C14H23N, Application In Synthesis of 2909-77-5.

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

Francis, Daniel published the artcileSynthesis of ¦Â-Diamine Building Blocks by Photocatalytic Hydroamination of Enecarbamates with Amines, Ammonia and N-H Heterocycles, SDS of cas: 22693-41-0, the publication is Chemistry – A European Journal (2020), 26(65), 14861-14865, database is CAplus and MEDLINE.

3-Amino-substituted saturated nitrogen heterocycles were an important subclass of ¦Â-diamines, appearing in a number of clin. agents. A unified approach to these products based upon the regioselective photoredox-mediated hydroamination of enecarbamates was discussed. The amine coupling partner was encompass diversed amine types under a single set of reaction conditions, including primary alkyl amines, ammonia, aryl and heteroaryl amines, and N-H heterocycles. The method enabled the synthesis of a wide range of pharmaceutically relevant building blocks.

Chemistry – A European Journal 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, SDS of cas: 22693-41-0.

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

Takacs, James M. published the artcileCatalytic iron-mediated ene carbocyclizations: formal [4+4]-ene reactions of triene esters, Formula: C15H15OP, the publication is Tetrahedron (1990), 46(16), 5507-22, database is CAplus.

2-Substituted 2,7,9-decatrienoates, e.g., I, undergo an iron-catalyzed carbocyclization to yield trans-disubstituted cyclopentanes, e.g., II, in moderate-to-good chem. yields. The cyclization products are formally the result of a [4+4]-ene reaction in which cis-propenyl and 2-acryloyl functionalities are introduced as appendages to the newly formed cyclopentane ring by the cyclization. Triene ester substrates bearing an alkyl substituent at the 4- or 6-positions cyclize with high 1,2-stereoinduction to yield trisubstituted cyclopentanes in which the relative stereochem. between three contiguous stereocenters is controlled.

Tetrahedron published new progress about 4141-48-4. 4141-48-4 belongs to catalysis-chemistry, auxiliary class Aryl phosphine ligand,Mono-phosphine Ligands, name is Allyldiphenylphosphine oxide, and the molecular formula is C15H19NO5, Formula: C15H15OP.

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

Chan, Ka-Wang published the artcileDi- and tri-nuclear ruthenium nitrosyl complexes containing thiolate ligands, COA of Formula: C15H24S, the publication is Journal of Organometallic Chemistry (2016), 151-157, database is CAplus.

Treatment of Ru(NO)Cl₃ with NaSC₆F₄H (C₆F₄HSH = 2,3,5,6-tetrafluorothiophenol) afforded the hydroxo-bridged dimer Na(H₂O)₂[Ru(NO)(SC₆HF₄)₂]₂(¦Ì-SC₆HF₄)₂(¦Ì-OH) (Na(H₂O)₂1), in which the {Na(H₂O)₂}⁺ moiety binds to the diruthenium core via the ¦Ì-hydroxo ligand and three ortho F atoms of the thiolate ligands. Metathesis of Na(H₂O)₂1 with Bu₄NBr and Ph₄PCl afforded Na-free (Bu₄N)[1] and (Ph₄P)[1], resp. Treatment of Ru(NO)Cl₃ with NaSBu^t afforded the trinuclear oxo-sulfido cluster Na(H₂O)₂[Ru(NO)(SBu^t)(¦Ì-SBu^t)]₃(¦Ì₃-S)(¦Ì₃-O) (Na(H₂O)₂2) that contains a trinuclear {Ru₃(SBu^t)₃} core capped by a ¦Ì₃-oxo and a ¦Ì₃-sulfido ligand. The {Na(H₂O)₂}⁺ moiety binds to the triruthenium core via the ¦Ì₃-oxo and two terminal thiolate ligands. Metathesis of Na(H₂O)₂2 with Bu₄NBr gave (Bu₄N)[2]. Treatment of Ru(NO)Cl₃ with NaStipp (tipp = 2,4,6-triisopropylphenyl) gave mononuclear Ru(NO)(Stipp)₃(tippSH) (3). The crystal structures of Na(H₂O)₂1, (Ph₄P)[1], and Na(H₂O)₂2 were determined

Journal of Organometallic 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, COA of Formula: C15H24S.

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

Pham, Chien Thang published the artcileIron(III) Metallacryptand and Metallacryptate Assemblies Derived from Aroylbis(N,N-diethylthioureas), Formula: C10H10O6, the publication is Inorganic Chemistry (2017), 56(18), 11406-11416, database is CAplus and MEDLINE.

The reaction of isophthaloylbis(N,N-diethylthiourea), H₂L¹, with FeCl₃¡¤6H₂O gives the dinuclear tris-complex [Fe₂(L¹)₃] (5), possessing a cryptand-like structure. A similar reaction with the ligand 2,6-dipicolinoylbis(N,N-diethylthiourea), H₂L², however, gave the anionic, mononuclear Fe(III) complex [Fe(L²)₂]^– (6), which could be isolated as its Tl⁺ salt by the subsequent addition of Tl(NO₃). A tighter view to the solid state structure of the obtained product, however, characterizes compound 6 as a 1-dimensional coordination polymer, in which four-coordinate Tl⁺ ions connect the {[Fe(L²)₂]^–} units to infinite chains. When Fe³⁺ ions and Tl⁺ ions are added to H₂L² simultaneously in a 1-pot reaction, a different product was obtained: a cationic trinuclear complex {M?[Fe₂(L²)₃]}⁺. It was isolated as a PF₆^– salt and represents a {2}-metallacryptate with a nine-coordinate Tl⁺ ion in the central void. Structurally related products {M?[Fe₂(L²)₃]}(PF₆) (M = Na⁺, K⁺, Rb⁺) (8 PF₆) were isolated from analogous reactions with alk. salts instead of Tl(NO₃). {2}-Metallacryptates with larger central voids were synthesized with the ether-spaced aroylbis(N,N-diethylthiourea) H₂L³. {M?[Fe₂(L³)₃]}(PF₆) (M = K⁺, Rb⁺, Tl⁺ or Cs⁺) (9 PF₆) were prepared by a similar protocol to those with H₂L² with the simultaneous addition of the metal ions to a solution of H₂L³. Due to the larger spacer between the aroylthiourea units, the coordination number of the central M⁺ ions is 12 by six carbonyl and six ether O atoms. All products were characterized by elemental anal., IR spectroscopy, and x-ray structure anal. Cyclic voltammetric studies were carried out with the three representative complexes [Fe₂(L¹)₃], {K?[Fe₂(L²)₃]}(PF₆), and {K?[Fe₂(L³)₃]}(PF₆). The obtained voltammograms indicate dependence of the redox properties of the oligonuclear systems on the conjugation in the organic backbones of the ligands.

Inorganic Chemistry 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, Formula: C10H10O6.

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

Thurakkal, Liya published the artcileDesign, synthesis and bioactive properties of a class of macrocycles with tunable functional groups and ring size, Name: N1,N2-Dibenzylethane-1,2-diamine, the publication is Scientific Reports (2022), 12(1), 4815, database is CAplus and MEDLINE.

Abstract: The design and synthesis of a versatile class of macrocycles with tunable functional groups and ring size are unfolded. Herein, a synthetic strategy is reported to furnish a new class of macrocycles in multi-gram scale in a two-step reaction. The total time taken for synthesizing a macrocycle is 1.5 h. Dithiocarbamates, an important functional group in biomedical and material sciences, is strategically incorporated in the macrocyclic backbone without metal for the first time. It is noteworthy that when state-of-the-art macrocycle synthesis is in millimolar concentration, this work employs the reaction in molar concentration (0.2-0.4 M). As proof-of-principle, a library of macrocycles was synthesized, varying the functional groups and ring size. The physicochem. properties of macrocycles revealed their druggable nature and are affirmed by protein (serum albumin) interaction study theor. and exptl. Diverse functional groups and ring sizes of macrocycles brought about twenty-five-fold difference in binding constant with the model protein.

Scientific Reports published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C9H6BrNO, Name: N1,N2-Dibenzylethane-1,2-diamine.

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

Shanbhag, Pramod published the artcileRauhut-Currier type homo- and heterocouplings involving nitroalkenes and nitrodienes, HPLC of Formula: 4230-93-7, the publication is Organic & Biomolecular Chemistry (2010), 8(21), 4867-4873, database is CAplus and MEDLINE.

Reaction of nitroalkenes R¹CH:CHNO₂ (R¹ = 2-furyl, 2-thienyl, Ph, etc.) or nitrodienes, e.g. R²CH:CHCH:CHNO₂ (R² = Ph, 2-furyl, etc.), with Me vinyl ketone or acrylate in the presence of the imidazole-LiCl catalyst system provides Rauhut-Currier (vinylogous Morita-Baylis-Hillman) adducts R¹CH:CH(NO₂)CH₂CH₂COX (X = Me, EtO) or R²CH:CHCH:C(NO₂)CH₂CH₂COMe in moderate yields. Under similar conditions (imidazole-hydroquinone), nitroalkenes and nitrodienes undergo self-dimerization to afford the Rauhut-Currier adducts in varying yields. An alternative self-dimerization-nitro group elimination pathway in the presence of tricyclohexylphosphine was observed with heteroaromatic nitroalkenes. A synthetically useful one-pot two step transformation of Rauhut-Currier adducts of nitroalkenes with Me vinyl ketone to 2,3-disubstituted cyclopentenones is also described.

Organic & Biomolecular Chemistry published new progress about 4230-93-7. 4230-93-7 belongs to catalysis-chemistry, auxiliary class Alkenyl,Nitro Compound,Benzene,Ether, name is 1,2-Dimethoxy-4-(2-nitrovinyl)benzene, and the molecular formula is C8H14O4, HPLC of Formula: 4230-93-7.

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

Abbas, H. A. published the artcileDecolourization of crystal violet using nano-sized novel fluorite structure Ga₂Zr_2-xW_xO₇ photocatalyst under visible light irradiation, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine, the publication is Royal Society Open Science (2020), 7(3), 191632, database is CAplus and MEDLINE.

Fluorite-type Zr-based oxides with the composition Ga₂Zr_2-xW_xO₇ (x = 0, 0.05, 0.1, 0.15 and 0.2) were prepared using the citrate technique. Appropriate characterizations of all prepared materials were carried out. X-ray diffraction clarified that the undoped and W-doped Ga₂Zr₂O₇ samples were crystallized in the cubic fluorite phase structure. The average particle size of the samples was in the range of 3-8 nm. The lowest band gap (1.7 eV) and the highest surface area (124.3 m² g^-1) were recorded for Ga₂Zr_0.85W_0.15O₇. The photocatalytic impacts of the prepared systems were studied by removal of crystal violet (CV) dye employing visible light illumination and taking into consideration the initial dye concentrations, duration of visible irradiation treatment, catalysts dose and the dopant concentration The obtained results showed higher dye removal with the boost of the catalyst dosage. W doping shifted the absorption to the visible light range by decreasing the band gap from 4.95 eV for parent Ga₂Zr₂O₇ to 1.7 eV for 15 mol% tungsten-doped Ga₂Zr₂O₇ enhancing the photocatalytic decolorization of CV from 4.2% to 83.6% for undoped and 15 mol% W-doped Ga₂Zr₂O₇, resp., at optimum operating conditions (pH 9, 1gl^-1 catalyst dose and 300 min) while heavily doped W sample containing 20 mol% W showed lower removal than 15 mol% W-doped Ga₂Zr₂O₇. Complete CV degradation using 15 mol% W-doped Ga₂Zr₂O₇ was attained with the assistance of 25 mmol l^-1 hydrogen peroxide. The reaction is aligned to pseudo-first-order kinetics. Different scavengers were introduced to decide the significance of the reactive species in CV degradation O-?2 and h+ had the major role in the degradation of CV by Ga₂Zr_2-xW_xO₇ system compared with HO?.

Royal Society Open Science published new progress about 140-28-3. 140-28-3 belongs to catalysis-chemistry, auxiliary class Benzenes, name is N1,N2-Dibenzylethane-1,2-diamine, and the molecular formula is C16H20N2, Recommanded Product: N1,N2-Dibenzylethane-1,2-diamine.

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

Deo, N. published the artcileBiological removal of some flotation collector reagents from aqueous solutions and mineral surfaces, Product Details of C14H31NO2, the publication is Minerals Engineering (1998), 11(8), 717-738, database is CAplus.

The utility of Bacillus polymyxa, a heterotrophic bacterium indigenous to ore deposits in the degradation of several flotation collectors was studied. Dodecyl amine, diamine, iso-Pr xanthate and Na oleate could be efficiently removed from alk. solutions through bioremediation in an environmentally acceptable fashion. The bacterial cells were capable of stripping adsorbed collector reagents from various mineral surfaces. Mechanisms of such a biodegradation process are illustrated through results from zeta potential, adsorption, bacterial growth and surface anal. studies.

Minerals Engineering 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, Product Details of C14H31NO2.

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