Tag: M.W=350-400

Liu, Chang-ling published the artcileEffects of different reaction conditions on preparation of azobenzene polymer, Formula: C23H28N2O4, the publication is Jilin Huagong Xueyuan Xuebao (2015), 32(8), 72-74, database is CAplus.

Photoresponsive azobenzene polymer has very good applications in the fields of information storage, photonics, mol. switch, etc. This is the first achieved that the azobenzene polymer was prepared by atom transfer radical polymerization (ATRP), using the trimethylolpropane as the initiator of nuclear preparation and using azobenzene as the monomer. The structure of polymer was characterized by the IR spectroscopy (FTIR) and hydrogen NMR spectrometer (¹H-NMR), which showed that the desired product had been synthesized successfully. The influences of reaction time and concentration of monomer/initiator on the polymerization were investigated.

Jilin Huagong Xueyuan Xuebao published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Formula: C23H28N2O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Tong, Zai-Zai published the artcileHierarchical self-assembly, photo-responsive phase behavior and variable tensile property of azobenzene-containing ABA triblock copolymers, HPLC of Formula: 135529-02-1, the publication is RSC Advances (2015), 5(6), 4030-4040, database is CAplus.

A series of triblock copolymers with liquid crystalline (LC) poly{6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate} (PMMAZO) as the end blocks and rubbery poly(Bu acrylate) (PnBA) as the midblock were synthesized. The effect of the interplay between the LC ordering and microphase separation on the hierarchical assembly of the triblock copolymers was studied. It is found that microphase separation at a larger scale can affect the LC ordering at a smaller scale, such as the stacking of the LC moieties, LC temperature and the domain size of the LC phase. On the other hand, alteration of the LC ordering, such as isotropization and smetic-to-nematic transition, may also lead to an order-order transition (OOT) or change in the long period of the microphase-separated structure. UV light can trigger the isomerization of the azobenzene LC moieties, which can be further amplified and exerts an effect on the microphase separation behavior, including the regularity of the microphase-separated structure and the OOT. The triblock copolymers also exhibit light-variable tensile properties. The results reveal that the phase behavior and mech. properties of this type of triblock copolymer can be readily regulated by light, thus it may be used as smart and functional thermoplastic elastomer.

RSC Advances published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C7H6Cl2O, HPLC of Formula: 135529-02-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

He, Xiaohua published the artcileNovel amphiphilic graft block azobenzene-containing copolymer with polypeptide block: synthesis, self-assembly and photo-responsive behavior, Application In Synthesis of 135529-02-1, the publication is RSC Advances (2020), 10(10), 5747-5757, database is CAplus and MEDLINE.

Well-defined amphiphilic graft block azobenzene-containing copolymer with polypeptide block was synthesized via a combination of copper-mediated atom transfer radical polymerization (ATRP), ring-opening polymerization and click reaction. The alkyne-terminated poly[6-(4-methoxy-azobenzene-4′-oxy)hexyl methacrylate] (PAzoMA) was synthesized by ATRP with a bromine-containing alkyne bifunctional initiator, and the azido-terminated poly(γ-2-chloroethyl-L-glutamate) (PCELG) was synthesized by ROP of γ-2-chloroethyl-L-glutamate-N-carboxyanhydride (CELG-NCA), then the two homopolymers were conjugated by click reaction to afford block azobenzene-containing copolymer PAzoMA-b-PCELG. The chloro groups in PCELG block were transformed into azido groups via azide reactions, and the alkyne-terminated MPEG was grafted to the polypeptide block to afford the final product PAzoMA-b-poly((L-glutamate)-graft-methoxy poly(ethylene glycol)) (PAzoMA-b-(PELG-g-MPEG)) by click reaction. Giant vesicles (micrometer size) were obtained from the amphiphilic graft block copolymer PAzoMA-b-(PELG-g-MPEG) through a solution self-assembly due to the rigid PAzoMA chains and polypeptide chains with the α-helical structure. The investigation of the photo-isomerization behavior of PAzoMA-b-(PELG-g-MPEG) in solution and in vesicular solution showed trans-cis isomerization in solution was quicker than that in vesicular solution and azobenzene J-aggregates in the vesicle solution were only observed The formation mechanisms of the vesicles were also explored. The research results may provide guidelines for the study of complex copolymers containing different types of rigid chains.

RSC Advances published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Application In Synthesis of 135529-02-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Tong, Zai-Zai published the artcileRegulation of the self-assembly morphology of azobenzene-bearing double hydrophobic block copolymers in aqueous solution by shifting the dynamic host-guest complexation, COA of Formula: C23H28N2O4, the publication is Polymer Chemistry (2015), 6(12), 2214-2225, database is CAplus.

The double hydrophobic azobenzene-containing diblock copolymers, namely, poly(L-lactide)-b-poly[6-(4-(4-methoxyphenylazo)phenoxy)hexyl methacrylate] (PLLA-b-PMMAZO), were successfully prepared by sequential atom transfer radical polymerization (ATRP) and ring opening polymerization These block copolymers (BCPs) can self-assemble into various morphologies in aqueous solution via host-guest interaction between the azobenzene (azo) groups and methyl-β-cyclodextrin (β-CD). The complexation equilibrium between azo and β-CD can be shifted by changing the length of the hydrophobic PLLA block, the micelle concentration or the β-CD/azo molar ratio; thus the micellar morphol. and the size of the PLLA-b-PMMAZO/β-CD complexes are altered. A vesicle-to-sphere-to-entrapped vesicle transition was observed at β-CD/azo = 1 as the PLLA block length increases. In addition, a large β-CD/azo ratio or higher micelle concentration leads to a vesicle-like morphol., while entrapped vesicles tend to be formed at a smaller β-CD/azo ratio or a lower micelle concentration It is found that prolongation of the UV irradiation time can also induce a vesicle-to-sphere-to-entrapped vesicle transition of the micellar morphol. Such a transition is reversible upon irradiation of visible light. In summary, the self-assembly behavior of PLLA-b-PMMAZO/β-CD complexes can be readily regulated by different methods. Moreover, the complexation between the azo groups and β-CD is inhomogeneous, which is responsible for the formation of entrapped vesicles and the microphase separation in the core of the spherical micelles and entrapped vesicles.

Polymer Chemistry published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H43NP2, COA of Formula: C23H28N2O4.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Xue, Xiaoqiang published the artcilePreparation and characterization of additive reaction azobenzene polymer, Quality Control of 135529-02-1, the publication is Gaofenzi Cailiao Kexue Yu Gongcheng (2020), 36(2), 12-19, database is CAplus.

A novel maleimide monomer 4-(furan-maleimide ethyl) Me methacrylate (MMA-FMI) was prepared by Diels-Alder reaction. A novel azobenzene monomer with furan, 4-(4-furan-2-methyl-2-acetate azo) Ph Me methacrylate (MMA-FAzo), was prepared by nitro reduction, diazotization, coupling. MMA-FAzo was randomly copolymerized with MMA-FMI and 4-(4-methoxy azo) Ph Me methacrylate (MMA-Azo-OCH₃) to obtain an additive reaction azobenzene polymer (PAzo). The structure of the polymer was characterized by NMR spectroscopy, Fourier IR spectroscopy, gel permeation chromatog. The photoinduced cis-trans isomerization behavior of the polymer was characterized by UV-Vis absorption spectrometer. By UV-Vis absorption spectrometer, the constant of photoinduced cis-trans isomerization rate is 0.217 s^-1, indicating that the PAzo is rapid light-response. The additive property of the polymer was analyzed by TGA. By the thermoreversible experiment, the crosslinked PAzo is recyclable and reprocessed.

Gaofenzi Cailiao Kexue Yu Gongcheng published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C10H15NO, Quality Control of 135529-02-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Lin, Shaoliang published the artcileTuning self-assembly and photo-responsive behavior of azobenzene-containing triblock copolymers by combining homopolymers, Application In Synthesis of 135529-02-1, the publication is Nanotechnology (2013), 24(8), 085602/1-085602/10, database is CAplus and MEDLINE.

The self-assembly behavior of azobenzene-based triblock copolymers poly(ethylene oxide)-block-polystyrene-block-poly[6-(4-methoxy-4′-oxy-azobenzene)hexyl methacrylate] (PEO-b-PS-b-PMMAZO) and their mixtures with PS or PMMAZO homopolymers were studied by means of transmission electron microscopy, SEM, laser light scattering and UV-vis spectrophotometry. It was found that pure block copolymers self-assembled into spherical micelles with core-shell structures. The addition of PS or PMMAZO homopolymers can not only increase the aggregate size but also had a significant influence on the photo-isomerization behavior and photo-deformation behavior of the aggregate. The photo-isomerization study revealed that a complete trans-cis or cis-trans isomerization of azobenzene chromophores could be acquired when irradiated with UV or visible light for polymers both in organic solutions and in micelles. The photo-isomerization rate of azobenzene chromophores increases when PS homopolymers were incorporated into micelles, while with the addition of PMMAZO homopolymers, it decreases. The photo-induced elongation of the aggregates by irradiation of a linearly polarized laser were observed for all the samples, and the deformation degree increases with the weight fraction of azobenzene groups in the parent copolymers, as well as the PMMAZO content for the mixture micelles.

Nanotechnology published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Application In Synthesis of 135529-02-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Liu, Chang-ling published the artcilePreparation of photoresponse azobenzene polymer by ATRP, Synthetic Route of 135529-02-1, the publication is Yinran Zhuji (2016), 33(8), 22-24, database is CAplus.

Azobenzene polymers have photoresponsive property and get very good application in fields of information storage, photonics, mol. switch etc. The azobenzene star polymer with three-arm was prepared by atom transfer radical polymerization (ATRP), using the trimethyolpropane as initiator, and azobenzene as monomer. The structure of polymers were characterized by IR spectroscopy (FTIR), hydrogen NMR spectrometer (¹H-NMR), howing the target product was successfully synthesized. The mol. weight and the mol. weight distribution of the polymer was measured by gel permeation chromatograph (GPC), and the synthesized polymer agreed with the “reactive-controllable” characteristics. The result of UV spectrophotometer absorption of polyazobenzene showed the configuration inversion under light radiation.

Yinran Zhuji published new progress about 135529-02-1. 135529-02-1 belongs to esters-buliding-blocks, auxiliary class azo,Alkenyl,Benzene,Ester,Ether, name is 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, and the molecular formula is C23H28N2O4, Synthetic Route of 135529-02-1.

Referemce:
https://en.wikipedia.org/wiki/Ester,
Ester – an overview | ScienceDirect Topics

Marques Cardoso, Carlos Magno published the artcileTransesterification of Pequi (Caryocar brasiliensis Camb.) bio-oil via heterogeneous acid catalysis: Catalyst preparation, process optimization and kinetics, Application of Methyl docosanoate, the main research area is Caryocar bio oil FAME heterogeneous acid catalysis.

The transesterification of Pequi (Caryocar brasiliensis Camb.) bio-oil was conduct with a heterogeneous acid catalyst prepared with the fruit’s carbonized rinds. The newly-developed catalyst was characterized by TGA/DSC, XRD diffraction, and FTIR anal. Experiments for process optimization of biodiesel production and catalyst reusability were carried out, also investigating the kinetics involved in bio-oil mass conversion. Crude FAME content was analyzed with GC-FID gas chromatographer and its fuel properties compared to worldwide standards Main finds were a crude FAME majorly composed by Me esters of palmitic acid, linoleic acid, and stearic acid, representing about 49.93, 13.24, and 10.16 weight%, resp. Optimized conditions for maximum FAME synthesis from Pequi bio-oil (99.4 ± 0.33%) were 18:1 M ratio of methanol to bio-oil, 60°C of temperature, 100 min of reaction, catalyst load of 2.5 weight%, and stirring speed of 600 rpm. Kinetics of the bio-oil mass conversion through transesterification presented reaction rates varying from 0.016 to 0.091 min-1, 63.07 kJ kg-1 of activation energy (Ea), and pre-exponential value (A) of 11.4E105. Catalyst efficiency decreased to 34.9% after 10 reuse cycles. Fuel properties of the crude FAME met worldwide standards of biodiesel quality, thus indicate that Pequi bio-oil is a viable, sustainable, and widely available feedstock option in Brazil.

Industrial Crops and Products published new progress about Caryocar brasiliense. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Application of Methyl docosanoate.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Syed, Chandini S. published the artcileExploration of antibacterial and antiproliferative secondary metabolites from marine Bacillus, Formula: C23H46O2, the main research area is decanoic acid methyl ester secondary metabolite anticancer antibacterial Bacillus.

Antiproliferative secondary metabolites producing bacterial strain AVSC4 isolated from marine sediments was identified as Bacillus flexus based on 16S rRNA gene sequence anal. Under the strategy of liquid- liquid extraction, the crude extract was obtained showed significant antibacterial activity against different clin. pathogens. 0.5% methionine and 0.4% NaCl act as inducers for maximizing the growth and antibacterial activity of strain at pH 7 and 40°C. Heptadecanoic acid and Me hexadecanoic acid were identified as major and dominant secondary metabolites by GC-MS anal. and also showed significant antiproliferative activity against HT-29 (Human colorectal adenocarcinoma) and A-549 (Lung Cancer) with IC50 value 93.4μg/mL and 50.04μg/mL.

Journal of Microbiology, Biotechnology and Food Sciences published new progress about Antibacterial agents. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, Formula: C23H46O2.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics

Ahmed, Kashif published the artcileChemical composition, antibacterial and antifungal activities of Azadirachta indica and Mentha spicata L. leave essential oils, HPLC of Formula: 929-77-1, the main research area is Azadirachta Mentha leave essential oil extract antibacterial antifungal microbe.

The current workout investigated the chem. symphony and bioactivities of essential oils of Azadirachta indica and Mentha spicata. The essential oils of both herbs were acquired by soxhlet extraction apparatus and a brief chem. examination was conducted by gas chromatog.-mass spectrometry (GC-MS) and GC (gas chromatog.). Total 13 constituents from the essential oils of Azadirachta indica had been identified among them the major components are 11-octadecanoic acid Me ester (87.76%), docosanoic acid (4.93%) and 9-octadecanoic acid Et ester (3%). Sixteen constituents from Mentha spicata essential oils were also observed among them the major ones are E-Piperitol (42.68%), Caryophyllene oxide (7.79%), 4-terpinol (4.39%), octanoic acid (4.24%), Ascaidole (3.8%), Carvacrol (3.3%), Anethole (3.2%), bicyclo-germacene (2.75%), Caryophyllene (2.73%), Thymol (1.99%), 2-decadienal (1.64%), D-carvone (1.58%), Piperitol (1.38%) and Linollyl acetate (1.34%). The essential oils were screened for their antimicrobial activities. The essential oil of Azadirachta indica was active against 5 Gram pos. and 2 Gram neg. bacteria showed activity against 1 fungi. Similarly mentha spicata essential oils were also active against 3 Gram pos. and 2 Gram neg. bacteria.

International Journal of Biosciences published new progress about Antibacterial agents. 929-77-1 belongs to class esters-buliding-blocks, name is Methyl docosanoate, and the molecular formula is C23H46O2, HPLC of Formula: 929-77-1.

Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics