Category: 1993/4/9

On August 1, 2022, Li, Zhen; Fu, Teng; Lu, Jia-Hui; He, Jie-Hao; Li, Wen-Da; Liu, Bo-Wen; Chen, Li; Wang, Yu-Zhong published an article.COA of Formula: C11H10O The title of the article was Ultra-high fire-safety unsaturated polyesters enabled by self-assembled micro/nano rod from Schiff base, diphenylphosphinyl group and nickel (II) metal. And the article contained the following:

As one of the most flammable common com. resins, high flammability and heat/smoke release characteristics of unsaturated polyesters (UP) lead to severe casualties and irreparable property loss. To solve these problem, a flame-retardant approach via the multiple synergic effects of promoting char-ability, phys. shielding heat/mass transfer, and quenching small mol. fragments in burning is proposed. Herein, a novel micro/nano rod flame retardant SDPPNi, composed of diphenylphosphinyl groups, Schiff base and Nickel (II), are synthesized by self-assembly based on the coordination reactions. The UP with 25 wt% SDPPNi (UP/SDPPNi25), shows quite excellent fire-safety performance, and its limiting oxygen index is as high as 38.0%, showing extremely high flame retardant efficiency. Meanwhile, its peak heat release rate, total heat release, fire growth rate, and maximum smoke d. (Dsmax) values are significantly reduced by 69%, 40%, 72%, and 42%, resp. During burning, the SDPPNi promotes UP to form compact char layers composed of pyridine derivatives, phosphoric-oxygenic compounds, and nickel-oxides, inhibiting the heat and mass transfer. Meanwhile, the SDPPNi also releases phosphoros-containing volatiles that can capture some small mol. fragments and break off the chain reaction of combustion. Therefore, a state-of-art strategy is proposed to endow UP resins with ultra-high fire-safety performance. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).COA of Formula: C11H10O

The Article related to ultra high unsaturated polyester nanorod mech property, Plastics Manufacture and Processing: Preparation Of Resins and other aspects.COA of Formula: C11H10O

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

Zhou, Jun; Mao, Lijun; Wu, Meng-Xiang; Peng, Zhiyong; Yang, Yiming; Zhou, Manfei; Zhao, Xiao-Li; Shi, Xueliang; Yang, Hai-Bo published an article in 2022, the title of the article was Extended phenothiazines: synthesis, photophysical and redox properties, and efficient photocatalytic oxidative coupling of amines.Application of 93-04-9 And the article contains the following content:

Herein authors successfully developed a ring-fusion approach to extend the conjugation length of phenothiazines and synthesized a series of novel extended phenothiazines. The intriguing π-conjugation length-dependent photophys. and redox properties of these extended phenothiazines, and their photocatalytic performance towards visible-light-driven oxidative coupling reactions of amines were systematically investigated. As compared with the conventional phenothiazine (PTZ), all the extended phenothiazines displayed reversible redox behavior and maintained a strong excited-state reduction potential as well. Consequently, phenothiazines with longer effective conjugation lengths could efficiently catalyze the oxidative coupling of amines to imines under visible-light irradiation; by comparison, the shorter PTZ could only catalyze such reactions in the presence of UV light. Moreover, one PTZ showed superior catalytic performance which can result in better yields within a shorter reaction time, and in a broad substrate scope. Finally, a direct and efficient conversion of amines to imines under sunlight in an air atm. was successfully realized. Authors believe that their study including the new phenothiazine modification methodol. and the newly developed extended phenothiazine-based photocatalysts will open up a new way to develop novel phenothiazine-based materials for optoelectronic and catalytic applications. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Application of 93-04-9

The Article related to extended phenothiazine preparation photophys redox property, imine preparation, amine photocatalytic oxidative coupling phenothiazine, Heterocyclic Compounds (More Than One Hetero Atom): Thiazines and other aspects.Application of 93-04-9

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 18, 2021, Knorrscheidt, Anja; Soler, Jordi; Huenecke, Nicole; Puellmann, Pascal; Garcia-Borras, Marc; Weissenborn, Martin J. published an article.Quality Control of 2-Methoxynaphthalene The title of the article was Accessing chemo- and regioselective benzylic and aromatic oxidations by protein engineering of an unspecific peroxygenase. And the article contained the following:

Unspecific peroxygenases (UPOs) enable oxyfunctionalizations of a broad substrate range with unparalleled activities. Tailoring these enzymes for chemo- and regioselective transformations represents a grand challenge due to the difficulties in their heterologous productions. Herein, we performed protein engineering in Saccharomyces cerevisiae using the MthUPO from Myceliophthora thermophila. More than 5300 transformants were screened. This protein engineering led to a significant reshaping of the active site as elucidated by computational modeling. The reshaping was responsible for the increased oxyfunctionalization activity, with improved kcat/Km values of up to 16.5-fold for the model substrate 5-nitro-1,3-benzodioxole. Moreover, variants were identified with high chemo- and regioselectivities in the oxyfunctionalization of aromatic and benzylic carbons, resp. The benzylic hydroxylation was demonstrated to perform with enantioselectivities of up to 95% ee. The proposed evolutionary protocol and rationalization of the enhanced activities and selectivities acquired by MthUPO variants represent a step forward toward the use and implementation of UPOs in biocatalytic synthetic pathways of industrial interest. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Quality Control of 2-Methoxynaphthalene

The Article related to saccharomyces unspecific peroxygenase protein engineering, Fermentation and Bioindustrial Chemistry: Industrial Chemicals and other aspects.Quality Control of 2-Methoxynaphthalene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On June 27, 2022, Bole, Leonie J.; Tortajada, Andreu; Hevia, Eva published an article.HPLC of Formula: 93-04-9 The title of the article was Enhancing Metalating Efficiency of the Sodium Amide NaTMP in Arene Borylation Applications. And the article contained the following:

Though LiTMP (TMP = 2,2,6,6-tetramethylpiperidide) is a commonly used amide, surprisingly the heavier NaTMP has hardly been utilized. Here, by mixing NaTMP with tridentate donor PMDETA (N,N,N’,N”,N”-pentamethyldiethylenetriamine), we provide structural, and mechanistic insights into the sodiation of non-activated arenes (e.g. anisole and benzene). While these reactions are low yielding, adding B(OiPr)3 has a profound effect, not only by intercepting the CAr-Na bond, but also by driving the metalation reaction towards quant. formation of more stabilized sodium aryl boronates. Demonstrating its metalating power, regioselective C2-metalation/borylation of naphthalene has been accomplished contrasting with single-metal based protocols which are unselective and low yielding. Extension to other arenes allows for in situ generation of aryl boronates which can then directly engage in Suzuki-Miyaura couplings, furnishing a range of biaryls in a selective and efficient manner. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).HPLC of Formula: 93-04-9

The Article related to metalation arene sodium amide borylation suzuki coupling preparation biaryl, amide, borylation, metalation, sodium, structural elucidation, Organometallic and Organometalloidal Compounds: Boron Compounds and other aspects.HPLC of Formula: 93-04-9

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem

On October 31, 2020, Ivancev-Tumbas, Ivana; Landwehrkamp, Lucas; Hobby, Ralph; Vernillo, Marco; Panglisch, Stefan published an article.Name: 2-Methoxynaphthalene The title of the article was Adsorption of organic pollutants from the aqueous phase using graphite as a model adsorbent. And the article contained the following:

Although graphite is not effective as an adsorbent in water treatment, it provides a homogenous, non-porous, carbonaceous structure that is ideal for studying fundamental adsorption mechanisms. High-purity graphite powder (C content 99.5%) was oxidized in an ozone stream, producing a near-surface oxygen content of 5.9 at.%, and was used together with the virgin material to establish adsorption isotherms for organic compounds in aqueous solutions We examined how the aromaticity and substituents of the adsorptives affect adsorption on the model-activated carbon surface. For both virgin and oxidized graphite, the adsorption capacity for the aromatic compounds decreased in the order 1-naphthol > 2-methoxynaphthalene > naphthalene > anisole > phenol, with significant differences in the adsorption capacities of the two graphite species observed only for anisole, naphthalene, and 1-naphthol. The Freundlich constantsfor the five compounds on virgin graphite were 23.9, 10.3, 5.5, 1.4, and 0.8 (nmol mg-1 )/(μmol L-1)n, resp. Naphthalene and 1-naphthol were slightly more adsorbed on the virgin material, whereas oxidized graphite had marginally better adsorption properties for anisole. The results underline the importance of dispersive and Π-Π interactions in the adsorption of organic compounds on carbonaceous adsorbents; a second aromatic ring in 1-naphthol and 2-methoxynaphthalene greatly increased the adsorption capacity for these compounds compared with their one-ring counterparts phenol and anisole. Differences were also observed in the adsorption of compounds containing hydroxyl or methoxy substituents, which have electron-donating properties (a resonance effect) but different electron-withdrawal characteristics (caused by induction). Two amino acids occurring as zwitterions, L-tryptophan and L-tyrosine, were also tested as adsorptives. L-Tryptophan, which has a larger aromatic system, achieved higher loading on graphite, suggesting an adsorption mechanism primarily governed by dispersive and Π-Π interactions for these two ionic compounds as well. The experimental process involved the reaction of 2-Methoxynaphthalene(cas: 93-04-9).Name: 2-Methoxynaphthalene

The Article related to graphite activated carbon adsorption mechanism organic pollutant, Water: Water Purification (Including Treatment For Industrial Uses) and other aspects.Name: 2-Methoxynaphthalene

Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem