Tag: M.W=350-400

Ma, Jing-Yao published the artcileSolvency and salt addition influence the photoresponsivity and fluorescence in an azobenzene-containing block copolymer, Computed Properties of 135529-02-1, the publication is Polymer (2021), 123941, database is CAplus.

We investigated the effects of solvency and salt addition on the morphol., photoresponsivity, and fluorescence of the block copolymer poly(ethylene glycol)methyl ether-block-poly(6-[4-(4′-methoxyphenylazo)phenoxy]hexyl methacrylate) (PEG-b-PAzo). The morphol. of PEG-b-PAzo was manipulated through dissolution in mixed solvents of DMF (DMF) and H₂O. DMF served as a good solvent for both blocks, whereas H₂O was a PEG-selective solvent. Increasing the concentration of H₂O in the mixed solvent increased the repulsive interaction between H₂O and PAzo chains, resulting in the assembly of PEG-b-PAzo into micelles composed of PEG in the corona and PAzo in the core. The confined geometry forced the mesogens to assemble into H-type aggregates. Adding KCl to the PEG-b-PAzo solution increased PEG segment hydrophobicity, causing an increase in the core radius and a reduction in the corona thickness. The opposite effect was observed when KSCN was added to the PEG-b-PAzo solution The addition of salts led to slight reductions in H-type aggregate percentage and increases in nonassocd. mesogen percentage. The fluorescence behavior of PEG-b-PAzo was closely correlated with a mesogen dispersion state. In the saltless PEG-b-PAzo solution, the increase in the percentage of the H-type aggregates, which was due to the addition of H₂O, caused fluorescence loss. The small changes in mesogen aggregation upon the addition of salts led to only a small change in fluorescence emission.

Polymer 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, Computed Properties of 135529-02-1.

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

Choi, Dong Hoon published the artcileEffect of photodimerization of chalcone moiety on the temporal stability of optically induced birefringence in photoresponsive polymers bearing a p-methoxyazobenzene, HPLC of Formula: 135529-02-1, the publication is Korea Polymer Journal (1999), 7(3), 189-195, database is CAplus.

We synthesized three methacrylate monomers containing chalcone moiety, mesogenic unit, and p-methoxyazobenzene chromophore, resp., and copolymers and homopolymers were prepared Trans-to-cis photoisomerization was observed under the exposure of UV. The kinetic study of trans-to-cis photoisomerization was performed in three different polymers. Reorientation of polar azobenzene mols. induced optical anisotropy under a linearly polarized light at 365 nm. The azobenzene unit underwent photoisomerization, and photodimerization was achieved in chalcone moieties under the same range light wavelength, while reorientation of azobenzene mol. was observed followed by photodimerization of chalcone moieties and the optically induced birefringence; the temporal stability was monitored without excitation light.

Korea Polymer Journal 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, HPLC of Formula: 135529-02-1.

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

Zhang, Haichao published the artcileSynthesis of side chain liquid crystalline polymethacrylates containing azobenzene mesogenic groups and the effect of spacer length on their liquid crystal behavior, Synthetic Route of 135529-02-1, the publication is Gaofenzi Xuebao (1999), 100-106, database is CAplus.

A series of thermotropic side chain liquid crystalline poly[ω-(4′-methoxy-4-azophenyloxy)alkanoyl]methacrylates (PMAAZOn, n = 2, 3, 4, 5, 6) were prepared by the reaction of potassium methacrylate and 4-methoxy-4′-(1-bromoalkoxy)azobenzene, then free radical polymerization in THF solution Their structures were verified by ¹H, ¹³C-NMR and IR spectra. The number average mol. weight ( M_W ) of PMAAZOn was around 20,000, thus the effects of M_W on the liquid crystalline (LC) properties were negligible. The LC behaviors of the polymers obtained were examined by DSC and optical polarizing microscope. Only one nematic state for PMAAZOn, (n = 2, 3 and 4), and two LC states, one smectic and one nematic state for the polymers of n = 5 and 6 were observed As spacer length increased, glass transition temperature decreased. On the curves of ΔH (enthalpy change) and ΔS (entropy change) against spacer length, the lowest values appeared at n = 3. The lowest stability of LC state was probably the result of odd-even effect and low decoupling. The odd-even effect on T_NI (clear point) of PMAAZOn was observed, and explained based on the placement of the mesogenic groups on relation to the polymer backbone. The phys. aging process of the polymers would increase their T_NI and decrease ΔH_NI (enthalpy change at clear point).

Gaofenzi 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 C7H7IN2O, Synthetic Route of 135529-02-1.

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

Tajuddin, Hazmi published the artcileIridium-catalyzed C-H borylation of quinolines and unsymmetrical 1,2-disubstituted benzenes: insights into steric and electronic effects on selectivity, Application of Methyl 2,4-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, the publication is Chemical Science (2012), 3(12), 3505-3515, database is CAplus.

Borylation of quinolines provides an attractive method for the late-stage functionalization of this important heterocycle. The regiochem. of this reaction is dominated by sterptsic factors but, by undertaking reactions at room temperature, an underlying electronic selectivity becomes apparent, as exemplified by the comparative reactions of 7-halo-2-methylquinoline and 2,7-dimethylquinoline which afford variable amounts of the 5- and 4-borylated products. Similar electronic selectivities are observed for nonsym. 1,2-disubstituted benzenes. The site of borylation can be simply estimated by anal. of the ¹H NMR spectrum of the starting material with preferential borylation occurring at the site of the most deshielded sterically accessible H or C atom. Such effects can be linked with C-H acidity. While DFT calculations of the pK_a for the C-H bond show good correlation with the observed selectivity, small differences suggest that related alternative, but much more computationally demanding values, such as the M-C bond strength, may be better quant. predictors of selectivity.

Chemical Science published new progress about 1417036-37-3. 1417036-37-3 belongs to esters-buliding-blocks, auxiliary class Boronic acid and ester, name is Methyl 2,4-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate, and the molecular formula is C12H10F2Si, Application of Methyl 2,4-bis(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzoate.

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

Xing, Minying published the artcileSynthesis of azobenzene functionalized dendritic block copolymer based on hyperbranched PDMAEMA and investigation of its drug release properties, COA of Formula: C23H28N2O4, the publication is Journal of Controlled Release (2011), 152(Suppl._1), e104-e105, database is CAplus and MEDLINE.

An azobenzene functionalized amphiphilic dendritic block copolymer based on hyperbranched poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) was synthesized by the combination of AGET ATRP and self-condensing vinyl polymerization techniques. The degree of branching of hyperbranched PDMAEMA can be controlled by the initial molar ratio of inimer and monomer. The kinetic and chain extension investigation showed that the polymerization was living. Using chlorambucil as the model drug, the drug loaded block copolymer showed controlled chlorambucil release which was sensitive to both pH and light.

Journal of Controlled Release 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 C11H15BF3N3O2, COA of Formula: C23H28N2O4.

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

Tang, Xinde published the artcileSynthesis and property of photo- and temperature- dual-responsive amphiphilic block copolymers, Application In Synthesis of 135529-02-1, the publication is Advanced Materials Research (Zuerich, Switzerland) (2010), 47-51, database is CAplus.

Photo- and temperature-responsive amphiphilic ethylene glycol-N-isopropylacrylamide (NIPAM)-6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate (MAZO) block copolymer (I) was designed and synthesized by atom transfer radical polymerization (ATRP). The macroinitiator based on polyethylene glycol (PEG, M_n = 2000 Da) was utilized to initiate the copolymerization of NIPAM and MAZO. I combining photo-responsive moieties with thermal-responsive moieties, showed photo- and temperature-dual-responsive property, among of which, PNIPAM shows lower critical solution temperature (LCST) and PMAZO exhibits reversible trans-cis isomerization under UV/vis irradiation In selective solution they can form selective micro-tunnel with excellent controlled release, and can be used as drug carrier and controllable membrane.

Advanced Materials Research (Zuerich, Switzerland) 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 C12H9NO, Application In Synthesis of 135529-02-1.

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

Li, Penghao published the artcileAssembly of a Porous Supramolecular Polyknot from Rigid Trigonal Prismatic Building Blocks, COA of Formula: C22H23BO4, the publication is Journal of the American Chemical Society (2019), 141(33), 12998-13002, database is CAplus and MEDLINE.

Herein we report a hydrogen-bonded three-dimensional porous supramol. polyknot assembled from a rigid trigonal prismatic triptycene building block with six extended peripheral aryl-carboxyl groups. Within this superstructure, three arrays of undulated 2D rhombic subnets, which display an inclined polycatenation, are interconnected to give an unprecedented uninodal six-connected net with a point symbol of (3.4⁴.6¹⁰). Such an entanglement results in a trefoil knot motif, which, as the basic repeating unit, is fused and interlocked with itself three-dimensionally to afford a supramol. polyknot. This example highlights the ability of supramol. systems to form topol. complex architectures using geometrically simple building blocks.

Journal of the American Chemical Society published new progress about 1448637-05-5. 1448637-05-5 belongs to esters-buliding-blocks, auxiliary class Alkynyl,Boronic acid and ester,Benzene,Ester,Boronate Esters,Boronic Acids,Boronic acid and ester,, name is Methyl 4-((4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)phenyl)ethynyl)benzoate, and the molecular formula is C22H23BO4, COA of Formula: C22H23BO4.

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

Miao, Tengfei published the artcileInduction, fixation and recovery of self-organized helical superstructures in achiral liquid crystalline polymer, Related Products of esters-buliding-blocks, the publication is Polymer Chemistry (2021), 12(41), 5931-5936, database is CAplus.

The fixation, storage and self-recovery of chiral information in superstructures constructed by weak noncovalent bonds remain a big challenge in nature. Here, we describe a novel self-assembled system where the mol. chirality can be transferred and further stored into a helical superstructure. Based on achiral liquid crystalline polymers (LCPs), the twist between azobenzene (Azo) units in polymer side chains can be switched by the configuration or alkyl chain length of the introduced chiral dopant. Furthermore, the crosslinking strategy of polymer side chains was adopted to allow permanent memory of the induced helical superstructure after complete removal of the chiral dopant. Although the helical superstructure was temporarily destroyed by UV light irradiation, the stored chiral information enabled self-recovery of the previous helical chirality, without the need for any pre-existing chiral source. The chiral switching in the absence of chiral source is unprecedented and opens a new window for the design and application of chiral materials.

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 C23H28N2O4, Related Products of esters-buliding-blocks.

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

Li, Jingyi published the artcilePhotoguided Shape Deformation of Azobenzene-Containing Polymer Microparticles, Name: 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, the publication is Langmuir (2015), 31(48), 13094-13100, database is CAplus and MEDLINE.

Here we present the generation of uniform microparticles with tunable diameters from azobenzene-based homopolymer by combining the microfluidics technique and emulsion-solvent evaporation route. In addition, the photoinduced deformation behavior of these microspheres, irradiated by a linearly polarized beam with different irradiation time and direction, are systemically studied. The deformation process through real time optical microscope observation can be studied, benefiting from the uniform and microscaled size of the polymer particles. The deformation degree characterized by relative variation of the long axial for the particles can be controlled by the irradiation time. Moreover, elongated particles with tunable aspect ratio or tilted shape can be generated by manipulating the irradiation direction and/or time. Interestingly, the shape transformation kinetics displays a significant dependence on initial size of the polymer particle. In addition, the shape transformation of the polymer particle can lead to the variation of the orientation and distribution of the encapsulated anisotropic gold nanorods.

Langmuir 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, Name: 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate.

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

Tang, Xinde published the artcilePhoto- and thermo-dual-responsive organic/inorganic hybrid materials, Application of 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate, the publication is Key Engineering Materials (2013), 181-184, 5 pp., database is CAplus.

Organic/inorganic hybrid materials based upon stimuli-responsive copolymers have attracted an increasing attention. Compared with the polymeric materials, these hybrid materials can form aggregates in aqueous solution with much more stable shape-persistence due to the inorganic structure, which facilitate the mass delivery and long-term life. A novel hybrid material based on a new reactive block copolymer, poly(ethylene oxide)-block-poly{3-(trimethoxysilyl)propyl methacrylate-co-N-isopropylacrylamide-co-6-[4-(4-methoxyphenylazo)phenoxy]hexyl methacrylate} [PEO-P(TMSPMA-NIPAM-AzoMA)] was synthesized via atom transfer radical polymerization (ATRP). The vesicles were obtained by self-assembly of the resulting block copolymer in a selective solvent, and then the PTMSPMA block was subjected to hydrolysis and polycondensation reaction to fix vesicle wall in the presence of triethylamine as a catalyst. The photo- and thermo-dual-responsive properties of the vesicles were investigated.

Key Engineering Materials 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 C9H6FNO2, Application of 6-(4-((4-Methoxyphenyl)diazenyl)phenoxy)hexyl methacrylate.

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