Tag: 200-300

In 2019,Journal of Polymer Science, Part A: Polymer Chemistry included an article by Park, Junghwa; Park, Yongman; Kim, Dukjoon. Application of 33100-27-5. The article was titled 《Chemical stability enhancement of crown ether grafted sulfonated poly(arylene ether ketone) fuel cell membrane by cerium ion fixation》. The information in the text is summarized as follows:

In operation of polymer electrolyte membrane fuel cell or direct methanol fuel cell, ·OH radicals are the major cause for the degradation of polymer electrolyte membrane. In order to enhance its antioxidation stability, cerium ion (Ce3+, CE), an ·OH radical quencher, is introduced to membrane, as it converts the ·OH radicals into inactive chems. In this study, aminoethyl-15-crown-5 (CRE) is grafted on the sulfonated poly(arylene ether ketone) (SPAEK) to prevent the migration of CE ions from the membrane for long-term antioxidation stability, as CRE forms a coordination complex with CE. The chem. and phys. structures of the CRE grafted SPAEK are examined using proton NMR, energy dispersive X-ray, and small-angle X-ray scattering spectroscopy. The phys. properties of the CRE grafted SPAEK membrane are investigated and compared with those of the CRE blended and CE blended ones. While the grafting of CRE does not significantly affect the thermal and mech. and water uptake behaviors of membranes, it leads to a significant improvement of antidegrdn. effect compared with other blend systems according to Fenton’s test. The proton conductivity decreases with addition of CE but its effect is lessened by introduction of CRE. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2018.1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Application of 33100-27-5) was used in this study.

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Application of 33100-27-5

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

In 2022,Luz, Eduardo Q.; Santana, Francielli S.; Silverio, Gabriel L.; Tullio, Suelen C. M. C.; Iodice, Bianca; Prola, Lizie D. T.; Barbosa, Ronilson V.; Rampon, Daniel S. published an article in Acta Crystallographica, Section E: Crystallographic Communications. The title of the article was 《Crystal structures of 3-halo-2-organochalcogenylbenzo[b]chalcogenophenes》.Recommanded Product: 1,2-Diphenyldisulfane The author mentioned the following in the article:

The structure of the title compounds 3-bromo-2-(phenylsulfanyl)benzo[b]thiophene (C14H9BrS2; 1), 3-iodo-2-(phenylsulfanyl)benzo[b]thiophene (C14H9IS2; 2), 3-bromo-2-(phenylselanyl)benzo[b]selenophene (C14H9BrSe2; 3), and 3-iodo-2-(phenylselanyl)benzo[b]selenophene (C14H9ISe2; 4) were determined by single-crystal X-ray diffraction; all structures presented monoclinic (P21/c) symmetry. The Ph group is distant from the halogen atom to minimize the steric hindrance repulsion for all structures. Moreover, the structures of 3 and 4 show an almost linear alignment of halogen-selenium-carbon atoms arising from the intramol. orbital interaction between a lone pair of electrons on the halogen atom and the antibonding σ*Se-C orbital (nhalogen→σ*Se-C). This interaction leads to significant differences in the three-dimensional packing of the mols., which are assembled through π-π and C-H···π interactions. These data provide a better comprehension of the intermol. packing in benzo[b]chalcogenophenes, which is relevant for optoelectronic applications. The experimental process involved the reaction of 1,2-Diphenyldisulfane(cas: 882-33-7Recommanded Product: 1,2-Diphenyldisulfane)

1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers.Although ethers resist hydrolysis, they are cleaved by hydrobromic acid and hydroiodic acid. Hydrogen chloride cleaves ethers only slowly. Recommanded Product: 1,2-Diphenyldisulfane

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

《Antibacterial and antifungal study on novel Ag(I)-15C5 complexes》 was published in European Journal of Biomedical and Pharmaceutical Sciences in 2020. These research results belong to Chitlangia, Seema; Ranjan, Rajeev. Reference of 1,4,7,10,13-Pentaoxacyclopentadecane The article mentions the following:

Crown ether is a general name given to macrocyclic polyethers containing ethylene bridges separating electroneg. oxygen atoms. They typically contain central electron rich hydrophilic cavity with diameter varying from 1.2-6.0 Å. Crown ethers have been used for the various studies pertaining to extraction equilibrium constant, stability constant and for determination of some of the alkali and alk. earth elements and other elements from p, d and f-block elements. Crown ethers have a significant coordination power towards silver ion. The present paper describes synthesis, characterization and antimicrobial study of novel Ag(I) complexes synthesized by 15-crown-5 ether. The organic salts used for complexation were salts of nitrophenols. Products were isolated from silver salts of all the three nitrophenols, 2-nitrophenol(ONPH), 2,4-dinitrophenol(DNPH) and 2,4,6-trinitrophenol(TNPH), having general formula of [Ag.L](Pic-), where L = 15C5 and Pic- = Picrate anion. Elemental anal., molar conductivity, UV-Vis, IR, and 1H-NMR spectral anal. were performed for establishment of the structure of synthesized complexes. Antibacterial activities of the synthesized complexes were determined by using Kirby Bauer disk diffusion method. Antibacterial and antifungal activity of the prepared complexes were determined and recorded by zone inhibition method. The experimental part of the paper was very detailed, including the reaction process of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Reference of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Reference of 1,4,7,10,13-Pentaoxacyclopentadecane

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

In 2017,Tang, Tommy Siu-Ming; Liu, Hua-Wei; Lo, Kenneth Kam-Wing published 《Monochromophoric iridium(III) pyridyl-tetrazine complexes as a unique design strategy for bioorthogonal probes with luminogenic behavior》.Chemical Communications (Cambridge, United Kingdom) published the findings.Safety of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate The information in the text is summarized as follows:

The coordination of pyridyl-tetrazine to a cationic iridium(III) center affords a novel class of luminogenic bioorthogonal probes for biomol. labeling and cellular imaging. The experimental part of the paper was very detailed, including the reaction process of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Safety of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.Safety of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate

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

《KF-Al2O3 catalyzed mild and efficient preparation of symmetrical disulfides from thiols》 was published in Indian Journal of Chemistry, Section B: Organic Chemistry Including Medicinal Chemistry in 2020. These research results belong to More, Vijaykumar; Malba, Chandrashekhar; Panchgalle, Sharad. Recommanded Product: 882-33-7 The article mentions the following:

A facile, efficient, convenient and environmentally friendly method for the oxidation of various thiols RCH2SH (R = n-Pr, Ph, 2-furyl, etc.) to their corresponding disulfides (RCH2S)2 catalyzed by KF-Al2O3 in very short reaction times in acetonitrile and at room temperature has been reported. In addition to this study using 1,2-Diphenyldisulfane, there are many other studies that have used 1,2-Diphenyldisulfane(cas: 882-33-7Recommanded Product: 882-33-7) was used in this study.

1,2-Diphenyldisulfane(cas: 882-33-7) belongs to ethers.Ethers do have nonbonding electron pairs on their oxygen atoms, and they can form hydrogen bonds with other molecules (alcohols, amines, etc.) that have O―H or N―H bonds. Recommanded Product: 882-33-7 The ability to form hydrogen bonds with other compounds makes ethers particularly good solvents for a wide variety of organic compounds and a surprisingly large number of inorganic compounds.

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

《Design of a multivalent bifunctional chelator for diagnostic 64Cu PET imaging in Alzheimer′s disease》 was published in Proceedings of the National Academy of Sciences of the United States of America in 2020. These research results belong to Cho, Hong-Jun; Huynh, Truc T.; Rogers, Buck E.; Mirica, Liviu M.. Product Details of 139115-91-6 The article mentions the following:

Herein, we report a 64Cu positron emission tomog. (PET) imaging agent that shows appreciable in vivo brain uptake and exhibits high specific affinity for beta-amyloid (Aβ) aggregates, leading to the successful PET imaging of amyloid plaques in the brains of 5xFAD mice vs. those of wild-type mice. The employed approach uses a bifunctional chelator with two Aβ-interacting fragments that dramatically improves the Aβ-binding affinity and lipophilicity for favorable blood-brain barrier penetration, while the use of optimized-length spacers between the Cu-chelating group and the Aβ-interacting fragments further improves the in vivo Aβ-binding specificity and brain uptake of the corresponding 64Cu PET imaging agent. The results came from multiple reactions, including the reaction of tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6Product Details of 139115-91-6)

tert-Butyl (2-(2-hydroxyethoxy)ethyl)carbamate(cas: 139115-91-6) belongs to ethers.The C-O bonds that comprise simple ethers are strong. Product Details of 139115-91-6 They are unreactive toward all but the strongest bases. Although generally of low chemical reactivity, they are more reactive than alkanes.

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

In 2022,Ahsin, Atazaz; Jadoon, Tabish; Ayub, Khurshid published an article in Physica E: Low-Dimensional Systems & Nanostructures (Amsterdam, Netherlands). The title of the article was 《M@[12-crown-4] and M@[15-crown-5] where (M=Li, Na, and K); the very first examples of non-conventional one alkali metal-containing alkalides with remarkable static and dynamic NLO response》.Synthetic Route of C10H20O5 The author mentioned the following in the article:

Excess electron compounds, such as alkalides, were shown to be promising nonlinear optical (NLO) materials with higher static and frequency-dependent nonlinearities. The intriguing alkalides are obtained after doping the alkali metals with crown ethers M@[12-crown-4] and M@[15-crown-5] (where M=Li, Na, and K). The studied complexes are thermodynamically stable and their interactions energies range from -66.51 to -3.51 kcal mol-1. The geometric, electronic, and nonlinear optical properties are validated through d. functional theory at the CAM-B3LYP/6-31+G(d,p) level of theory. The significant (neg.) NBO charge present on alkali metals reveals their alkalide characteristics. Furthermore, reduced HOMO-LUMO gaps for the designed complexes show their excellent electronic and conductive properties. Being excess electron candidate the significant static first hyperpolarizability value increased up to 1.2 x 107 au where the βvec response recorded up to 1.1 x 107 au. The total hyperpolarizability nicely correlates with hyperpolarizability (βtl) which suggests their excellent NLO properties. Besides, the dynamic hyperpolarizability response for electro-optical pockel’s effect β(-2ω;ω,0) increases up to 3.5 x 107 au at dispersion frequency of 1064 nm. The dynamic hyperpolarizability responses for SHG are much pronounced at the larger dispersion frequency. The dynamic second hyperpolarizability response for the dc-Kerr effect increases up to 6.4 x 109 au. The frequency-dependent NLO response of M@[12-crown-4] alkalides is slightly larger than those of M@[12-crown-4]. Moreover, the hyper Rayleigh scattering hyperpolarizability (βHRS) value is calculated up to 3.4 x 106 au. The experimental part of the paper was very detailed, including the reaction process of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Synthetic Route of C10H20O5)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Synthetic Route of C10H20O5

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

《Destructive-quantum-interference suppression in crown ether single molecule junction》 was published in European Physical Journal B: Condensed Matter and Complex Systems in 2020. These research results belong to Mijbil, Zainelabideen Y.; Essa, Haider O.. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane The article mentions the following:

The electronic transmission coefficient of X-crown ether-Y (X = 3Y ;Y = 4, 5, and 6) have been investigated using d. functional theory and Green’s function approximation incorporated with the Huckel method. The results illustrate unexpected role of the oxygen atoms to highly enhance charge transport in the crown ether mols. by moving the destructive quantum interferences (QI) close to the Fermi level. Such slight shifting creates a beneficial peak-valley pattern in the transmission spectra that facilitates the ON/OFF variation. Moreover, the length of the crown ether rings offers an insignificant impact on electronic transmission. Hence, we believe that these findings would deepen our understanding of QI patterns and exploit crown ether mols. more practically and efficiently in mol. devices. The results came from multiple reactions, including the reaction of 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Quality Control of 1,4,7,10,13-Pentaoxacyclopentadecane

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

The author of 《Importance of terminated groups in 9,9-bis(4-methoxyphenyl)-substituted fluorene-based hole transport materials for highly efficient organic-inorganic hybrid and all-inorganic perovskite solar cells》 were Zhang, Dongyang; Tai, Wu‡; Xu, Peng; Ou, Yangmei; Sun, Anxin; Ma, Huili; Cui, Bo; Sun, Hanwen; Ding, Liming; Hua, Yong. And the article was published in Journal of Materials Chemistry A: Materials for Energy and Sustainability in 2019. Recommanded Product: Bis(4-methoxyphenyl)amine The author mentioned the following in the article:

Hole-transport materials (HTMs) play a crucial role in determining the photovoltaic performance and long-term stability of perovskite solar cells (PSCs), because they not only efficiently facilitate hole-extraction and transfer, but also act as a barrier to protect the perovskite from moisture and oxygen. So far, the power conversion efficiencies (PCEs) over 20% in PSCs have been mostly achieved by employing a Spiro-OMeTAD-based HTM. However, it suffers from some drawbacks such as relatively low hole-mobility, complicated synthesis and difficult purification, which hamper its potential com. applications. Here, for the first time, two new easily accessible 9,9-bis(4-methoxyphenyl)-substituted fluorene-based HTMs comprising H (YT1) and methoxyphenyl-fluorene (YT3) as the terminated groups have been synthesized for use in organic-inorganic hybrid and all-inorganic PSCs. The (FAPbI3)0.85(MAPbBr3)0.15 and CsPbI2Br PSCs based on YT3 yield very impressive PCEs of 20.23% and 13.36%, resp., both of which are higher than that of Spiro-OMeTAD (19.18% and 12.30%). More encouragingly, the YT3-based PSC displays good long-term stability for 600 h. These results confirm that different terminated groups in HTMs show a significant effect on the energy levels, hole extraction and transfer, thin-film surface morphol. and photovoltaic performance. Our findings could provide a useful insight for future rational design of HTMs for highly efficient and stable PSCs. In the part of experimental materials, we found many familiar compounds, such as Bis(4-methoxyphenyl)amine(cas: 101-70-2Recommanded Product: Bis(4-methoxyphenyl)amine)

Bis(4-methoxyphenyl)amine(cas: 101-70-2) is a diphenylamine derivative used as a chemical additive for cured rubber.Bis(4-methoxyphenyl)amine is highly toxic and may potentially induce chromosome abberation.Recommanded Product: Bis(4-methoxyphenyl)amine

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

In 2022,Eichstaedt, Natalie; van der Zwan, Kasper P.; Mayr, Lina; Siegel, Renee; Senker, Juergen; Breu, Josef published an article in Zeitschrift fuer Naturforschung, B: A Journal of Chemical Sciences. The title of the article was 《Crystal structure of phenanthrenide salts stabilized by 15-crown-5 and 18-crown-6》.Application In Synthesis of 1,4,7,10,13-Pentaoxacyclopentadecane The author mentioned the following in the article:

Potassium 15-crown-5 phenanthrenide and potassium 18-crown-6 phenanthrenide were synthesized and characterized by powder X-ray diffraction and 39K solid state NMR spectroscopy. While the radical carbanion is very reactive in solution, the crystals are stable and storable under inert atm. For 15-crown-5, a sandwich-like complex of potassium is formed with two mols. of crown ether per potassium resulting in a coordination number of 10. For the larger 18-crown-6 ligand, a 1:1 complex is obtained and a coordination number of 6 for the potassium cation. In neither crystal structure solvent mols. are incorporated. The 15-crown-5 compound crystallizes faster and is less soluble in THF as compared to the 18-crown-6 compound Both compounds form solid phenanthrenide that is easy to handle and can be applied for reduction reactions. In the experimental materials used by the author, we found 1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5Application In Synthesis of 1,4,7,10,13-Pentaoxacyclopentadecane)

1,4,7,10,13-Pentaoxacyclopentadecane(cas: 33100-27-5) is a member of crown ether Ligands. Crown-ethers are macrocyclic polyethers capable of forming host-guest complexes, especially with inorganic and organic cations. Crown-ethers can incorporate protonated primary amine compounds by formation of ion-dipole bonds with the oxygen atoms of the chiral selector. Crown-ethers have been widely used for the separation of several pharmaceuticals both in aqueous and non-aqueous media. Application In Synthesis of 1,4,7,10,13-Pentaoxacyclopentadecane

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