Category: 33941-15-0

Recommanded Product: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Complexation and Separation of Trivalent Actinides and Lanthanides by a Novel DGA Derived from Macrocyclic Crown Ether: Synthesis, Extraction, and Spectroscopic and Density Functional Theory Studies. Author is Fan, Yu; Li, Youzhen; Shu, Xi; Wu, Rulei; Chen, Shanyong; Jin, Yongdong; Xu, Chao; Chen, Jing; Huang, Chao; Xia, Chuanqin.

A DGA-arm-grafted macrocyclic aza-crown ether ligand (Cr6DGA) was synthesized, and its solvent extraction behavior toward trivalent americium and europium in nitric acid medium was studied. The effects of various parameters such as the contact time, temperature, concentration of the extractant, and acidity on the extraction by Cr6DGA were investigated. It was found that in 3 mol/L HNO3, the SFEu/Am value was about 2. The complexation energies calculated by DFT showed that the Eu(III) complexes were more stable than the corresponding Am(III) complexes in gas, aqueous, and organic phases. Furthermore, the coordination study showed that the metal/ligand ratio of the extracted species was 1:2 by mass spectrometry (MS) anal. The time-resolved laser-induced fluorescence spectra (TRLFS) further proved that the extracted species contained one water mol., and so the composition of the extracted complexes may be [EuL2NO3(H2O)]2+ or [EuL2(NO3)2(H2O)]+. Finally, DFT calculations revealed that [EuL2(NO3)2(H2O)]+ is a more stable species and the binding energy of Eu(III) with the DGA unit is lower than that with the crown unit.

This compound(1,4,7,10,13-Pentaoxa-16-azacyclooctadecane)Recommanded Product: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane was discussed at the molecular level, the effects of temperature and reaction time on the properties of the compound were discussed, and the optimum reaction conditions were selected.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Reference of 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Barium selective chemosensing by diazacrown ether naphthalimide turn-on fluorophores for single ion barium tagging. Author is Thapa, P.; Byrnes, N. K.; Denisenko, A. A.; Foss, F. W. Jr.; Jones, B. J. P.; Mao, J. X.; McDonald, A. D.; Nam, K.; Newhouse, C. A.; Nygren, D. R.; Vuong, T. T.; Woodruff, K..

Single mol. fluorescence detection of barium is investigated for enhancing the sensitivity and robustness of a neutrinoless double beta decay (0νββ) search in 136Xe, the discovery of which would alter our understanding of the nature of neutrinos and the early history of the Universe. A key developmental step is the synthesis of barium selective chemosensors capable of incorporation into ongoing experiments in high-pressure 136Xe gas. Here we report turn-on fluorescent naphthalimide chemosensors containing monoaza- and diaza-crown ethers as agents for single Ba2+ detection. Monoaza-18-crown-6 ether naphthalimide sensors showed sensitivity primarily to Ba2+ and Hg2+, whereas two diaza-18-crown-6 ether naphthalimides revealed a desirable selectivity toward Ba2+. Solution-phase fluorescence and NMR experiments support a photoinduced electron transfer mechanism enabling turn-on fluorescence sensing in the presence of barium ions. Changes in ion-receptor interactions enable effective selectivity between competitive barium, mercury, and potassium ions, with detailed calculations correctly predicting fluorescence responses. With these mols., dry-phase single Ba2+ ion imaging with turnon fluorescence is realized using oil-free microscopy techniques. This represents a significant advance toward a practical method of single Ba2+ detection within large volumes of 136Xe, plausibly enabling a background-free technique to search for the hypothetical process of 0νββ.

《Barium selective chemosensing by diazacrown ether naphthalimide turn-on fluorophores for single ion barium tagging》 provides a strategy for the preparation of materials with excellent comprehensive properties, which is conducive to broaden the application field of this compound(1,4,7,10,13-Pentaoxa-16-azacyclooctadecane)Reference of 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Abel, Anton S.; Mitrofanov, Alexander Yu; Yakushev, Aleksei A.; Zenkov, Ilya S.; Morozkov, Gleb V.; Averin, Alexei D.; Beletskaya, Irina P.; Michalak, Julien; Brandes, Stephane; Bessmertnykh-Lemeune, Alla researched the compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane( cas:33941-15-0 ).Related Products of 33941-15-0.They published the article 《1,10-Phenanthroline Carboxylic Acids for Preparation of Functionalized Metal-Organic Frameworks》 about this compound( cas:33941-15-0 ) in Asian Journal of Organic Chemistry. Keywords: functionalized metal organic framework preparation. We’ll tell you more about this compound (cas:33941-15-0).

Synthetic approaches to 1,10-phenanthroline-3-carboxylic acid I [R = H; R1 = CO2H], 1,10-phenanthroline-3,8-dicarboxylic acid I [R = R1 = CO2H] and their functionalized derivatives, e.g., II were investigated. Acids I [R = H, CO2H; R1 = CO2H] were prepared in good yields from bromophenanthrolines via palladium-catalyzed alkoxycarbonylation. Moreover, Bu 8-bromo-1,10-phenanthroline-3-carboxylate was obtained in acceptable yield (25-35%) by ceasing the carbonylation of the dibromide I [R = R1 = Br] after 30-70% consumption of the starting compound To prepare functionalized derivatives of acids I [R = H, CO2H; R1 = CO2H], the reactions of Bu 8-bromo-1,10-phenanthroline-3-carboxylate and di-Et 4,7-dichloro-1,10-phenanthroline-3,8-dicarboxylate with various nucleophiles were investigated. SNAr reactions were suitable for the synthesis of 4,7-diazido-, dimethoxy- and diamino-substituted 3,8-bis(ethoxycarbonyl)phenanthrolines, including the macrocyclic derivatives The bromine atom at position 8 of the phenanthroline ring reacts with nucleophiles only in the presence of the palladium catalysts. The scope of these reactions was briefly investigated conducting Sonogashira, Suzuki-Miyaura and Hirao reactions. Hydrolysis of the functionalized esters of phenanthroline leads to corresponding acids in good yields.

The article 《1,10-Phenanthroline Carboxylic Acids for Preparation of Functionalized Metal-Organic Frameworks》 also mentions many details about this compound(33941-15-0)Related Products of 33941-15-0, you can pay attention to it, because details determine success or failure

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane(SMILESS: O1CCOCCOCCOCCOCCNCC1,cas:33941-15-0) is researched.Reference of 1-(Furan-2-yl)propan-1-one. The article 《A general method to optimize and functionalize red-shifted rhodamine dyes》 in relation to this compound, is published in Nature Methods. Let’s take a look at the latest research on this compound (cas:33941-15-0).

Expanding the palette of fluorescent dyes is vital to push the frontier of biol. imaging. Although rhodamine dyes remain the premier type of small-mol. fluorophore owing to their bioavailability and brightness, variants excited with far-red or near-IR light suffer from poor performance due to their propensity to adopt a lipophilic, nonfluorescent form. Herein a framework for rationalizing rhodamine behavior in biol. environments and a general chem. modification for rhodamines that optimizes long-wavelength variants and enables facile functionalization with different chem. groups is reported. This strategy yields red-shifted ‘Janelia Fluor’ (JF) dyes useful for biol. imaging experiments in cells and in vivo.

The article 《A general method to optimize and functionalize red-shifted rhodamine dyes》 also mentions many details about this compound(33941-15-0)Synthetic Route of C12H25NO5, you can pay attention to it or contacet with the author([email protected]) to get more information.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The three-dimensional configuration of the ester heterocycle is basically the same as that of the carbocycle. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane(SMILESS: O1CCOCCOCCOCCOCCNCC1,cas:33941-15-0) is researched.Recommanded Product: 3194-15-8. The article 《Monofunctionalized Bambus[6]urils and Their Conjugates with Crown Ethers for Liquid-Liquid Extraction of Inorganic Salts》 in relation to this compound, is published in Organic Letters. Let’s take a look at the latest research on this compound (cas:33941-15-0).

In this Letter, the first synthesis of monofunctionalized bambusurils I [R = (CH2)4COOH, 4-HO2CC6H4] and their use for preparation of heteroditopic bambusuril-crown ether conjugates suitable for extraction of ion pairs from water to chloroform was presented.

After consulting a lot of data, we found that this compound(33941-15-0)HPLC of Formula: 33941-15-0 can be used in many types of reactions. And in most cases, this compound has more advantages.

Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane( cas:33941-15-0 ) is researched.Recommanded Product: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane.Rivilla, Ivan; Aparicio, Borja; Bueno, Juan M.; Casanova, David; Tonnele, Claire; Freixa, Zoraida; Herrero, Pablo; Rogero, Celia; Miranda, Jose I.; Martinez-Ojeda, Rosa M.; Monrabal, Francesc; Olave, Benat; Schafer, Thomas; Artal, Pablo; Nygren, David; Cossio, Fernando P.; Gomez-Cadenas, Juan J. published the article 《Fluorescent bicolor sensor for low-background neutrinoless double β decay experiments》 about this compound( cas:33941-15-0 ) in Nature (London, United Kingdom). Keywords: high pressure xenon gas detector barium tagging neutrinoless decay; fluorescent bicolor sensor neutrinoless double beta decay experiment. Let’s learn more about this compound (cas:33941-15-0).

Observation of the neutrinoless double β decay is the only practical way to establish that neutrinos are their own antiparticles. Because of the small masses of neutrinos, the lifetime of neutrinoless double β decay is expected to be at least ten orders of magnitude greater than the typical lifetimes of natural radioactive chains, which can mimic the exptl. signature of neutrinoless double β decay. The most robust identification of neutrinoless double β decay requires the definition of a signature signal-such as the observation of the daughter atom in the decay-that cannot be generated by radioactive backgrounds, as well as excellent energy resolution In particular, the neutrinoless double β decay of 136Xe could be established by detecting the daughter atom, 136Ba2+, in its doubly ionized state. Here, the authors demonstrate an important step towards a ′barium-tagging′ experiment, which identifies double β decay through the detection of a single Ba2+ ion. they propose a fluorescent bicolor indicator as the core of a sensor that can detect single Ba2+ ions in a high-pressure xenon gas detector. In a sensor made of a monolayer of such indicators, the Ba2+ dication would be captured by one of the mols. and generate a Ba2+-coordinated species with distinct photophys. properties. The presence of such a single Ba2+-coordinated indicator would be revealed by its response to repeated interrogation with a laser system, enabling the development of a sensor able to detect single Ba2+ ions in high-pressure xenon gas detectors for barium-tagging experiments

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Mechanochemical Solvent-Free Conditions for the Synthesis of Pillar[5]arene-Containing [2]Rotaxanes, published in 2019, which mentions a compound: 33941-15-0, mainly applied to pillararene diamide rotaxane inclusion preparation mechanochem ball milling, COA of Formula: C12H25NO5.

Pillar[5]arene-containing [2]rotaxanes have been efficiently prepared under solvent-free conditions. Specifically, solid-to-solid ball-milling of primary or secondary amine reagents with the inclusion complex resulting from the association of dodecanedioyl dichloride and a pillar[5]arene derivative provided the corresponding diamide [2]rotaxanes in good to excellent yields. Importantly, [2]rotaxanes difficult or even impossible to prepare under classical reaction conditions in solution, are now easily obtained.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Recommanded Product: 33941-15-0. The reaction of aromatic heterocyclic molecules with protons is called protonation. Aromatic heterocycles are more basic than benzene due to the participation of heteroatoms. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Facile fabrication of crown ether functionalized lignin-based biosorbent for the selective removal of Pb(II). Author is Jin, Can; Liu, Guifeng; Wu, Guomin; Huo, Shuping; Liu, Zengshe; Kong, Zhenwu.

A novel 1-Aza-18-crown-6 functionalized lignin-based adsorbent (AFL) is facilely prepared through Mannich reaction in a one-step process. Structure characterization by Fourier transform IR spectroscopy, NMR spectroscopy, elemental anal. and XPS confirmed the successful fabrication of AFL. AFL was observed to display enhanced adsorption capacity (Qmax = 91.4 mg/g) and superior selectivity toward Pb(II) ions, due to a display of crown ether units and their interaction with metal ions. The adsorption equilibrium results from a kinetic study indicated that the Pb(II) adsorption by AFL was a chemisorption process. Addnl., the obtained thermodn. parameters showed the adsorption mechanism to be an exothermic and spontaneous process at room temperature The AFL could be regenerated by desorption of Pb(II) ions and remained at over 80% adsorption efficiency after four adsorption-desorption cycles. Therefore, the AFL displays acceptable adsorption performance and can serve as a bioresource-based and recyclable adsorbent material, portending a new expectation in the application for water purification engineering.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Application of 33941-15-0. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Axially- and Meso-Substituted Aza-Crown-Ether-Incorporated BIII Subporphyrins: Control of Electron-Donating Ability by Metal Ion Chelation.

A series of subporphyrin-based fluorescent probes bearing 1-aza-15-crown-5 or 1-aza-18-crown-6 moieties at the meso or axial positions were prepared by Pd-catalyzed Buchwald-Hartwig amination reaction of the corresponding bromosubporphyrins. Both types of aza-crown-ether-incorporated subporphyrins were fluorescent in solution and exhibited cation-dependent absorption and fluorescence changes. In fluorescence titration experiments, opposite responses were observed for the two types of subporphyrins. Namely, fluorescence quenching occurred for the meso-substituted subporphyrins while fluorescence enhancement was observed for the axially-substituted subporphyrins. These results demonstrate the advantage of subporphyrins being viable to serve as turn-off-type or turn-on-type fluorescence probes, depending upon substitution pattern.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem

Related Products of 33941-15-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: 1,4,7,10,13-Pentaoxa-16-azacyclooctadecane, is researched, Molecular C12H25NO5, CAS is 33941-15-0, about Design and characterization of a 2-(2′-hydroxyphenyl)benzimidazole-based Sr2+-selective fluorescent probe in organic and micellar solution systems. Author is Akutsu-Suyama, Kazuhiro; Mori, Seiji; Hanashima, Takayasu.

A novel Sr2+ fluorescent probe, N-(2-hydroxy-3-(1H-benzimidazol-2-yl)-phenyl)-1-aza-18-crown-6-ether (BIC), was synthesized and its fluorescence properties, equilibrium, and local structure in solution were studied in detail. The fluorescence intensity of BIC in DMSO was enhanced selectively upon addition of Sr2+ but not Na+, K+, Mg2+, Ca2+, and Ba2+. To employ this rather hydrophobic BIC probe in aqueous media, a sodium laurate (LaNa) micellar solution was used as a good solvent. The detection limit of said LaNa micelle-BIC system (2.02μM) is lower than that of the H2O system (309μM), but higher than that of the DMSO system (0.04μM). Therefore, it is clear that the LaNa micelles have an effect on the detection of Sr2+ by BIC in aqueous solutions Further structural studies by extended X-ray absorption fine structure and speciation analyses revealed that BIC undergoes complexation equilibrium corresponding to the formation of [Sr(BIC)]+ species in all solution types. It was concluded that the changes in the Sr2+-BIC fluorescence in solution are attributed to the formation of such [Sr(BIC)]+ complexes.

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Reference:
Benzoxazole – Wikipedia,
Benzoxazole | C7H5NO – PubChem