Tag: M.W=300-350

Zhang, Hui published the artcileAltering intercomponent interactions in a photochromic multi-state [2]rotaxane, Quality Control of 219537-97-0, the publication is Organic & Biomolecular Chemistry (2011), 9(11), 4051-4056, database is CAplus and MEDLINE.

Rotaxanes have attracted much attention because of their challenging constructions and potential applications. In this paper, a multi-state [2]rotaxane, in which a dithienylethene-functionalized dibenzo-24-crown-8 macrocycle was interlocked onto a thread component bearing a 4-morpholin-naphthalimide fluorescent stopper and two distinct recognition sites, namely, dibenzylammonium and N-methyltriazolium recognition sites, was prepared and studied. By introducing a dithienylethene photochrome into the macrocycle component, multi-mode alteration of the intercomponent interactions, such as energy transfer, electron transfer, and charge transfer interaction between the photochrome and the fluorescent naphthalimide stopper could be altered in this multi-state rotaxane system in response to the combination of chem. and photochem. stimuli.

Organic & Biomolecular Chemistry published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C20H21ClN4O4, Quality Control of 219537-97-0.

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

Thurston, John H. published the artcile5. Trinuclear tungsten halide clusters, Application In Synthesis of 23616-79-7, the publication is Inorganic Syntheses (2014), 24-30, database is CAplus.

The preparation of title compound is described. Thus, reaction of WCl₆ with Bi gave W₃Cl₁₀, whereas reaction of WCl₆ with Sb in presence of NaCl gave Na₃W₃Cl₁₃ which on treatment with [N(CH₂Ph)Bu₃]Cl gave title compound, [N(CH₂Ph)Bu₃]₃[W₃(μ₃-Cl)(μ-Cl)₃Cl₉].

Inorganic Syntheses published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C6H12O2, Application In Synthesis of 23616-79-7.

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

Afonin, Sergii published the artcileIn Vivo Behavior of the Antibacterial Peptide Cyclo[RRRWFW], Explored Using a 3-Hydroxychromone-Derived Fluorescent Amino Acid, Safety of 2-Chlorotrityl chloride, the publication is Frontiers in Chemistry (Lausanne, Switzerland) (2021), 688446, database is CAplus and MEDLINE.

Labeling biomols. with fluorescent labels is an established tool for structural, biochem., and biophys. studies; however, it remains underused for small peptides. In this work, an amino acid bearing a 3-hydroxychromone fluorophore, 2- amino-3-(2-(furan-2-yl)-3-hydroxy-4-oxo-4H-chromen-6-yl)propanoic acid (FHC), was incorporated in a known hexameric antimicrobial peptide, cyclo[RRRWFW] (cWFW), in place of aromatic residues. CD spectropolarimetry and antibacterial activity measurements demonstrated that the FHC residue perturbs the peptide structure depending on labeling position but does not modify the activity of cWFW significantly. FHC thus can be considered an adequate label for studies of the parent peptide. Several anal. and imaging techniques were used to establish the activity of the obtained labeled cWFW analogs toward animal cells and to study the behavior of the peptides in a multicellular organism. The 3-hydroxychromone fluorophore can undergo excited-state intramol. proton transfer (ESIPT), resulting in double-band emission from its two tautomeric forms. This feature allowed us to get insights into conformational equilibrium of the labeled peptides, localize the cWFW analogs in human cells (HeLa and HEK293) and zebrafish embryos, and assess the polarity of the local environment around the label by confocal fluorescence microscopy. We found that the labeled peptides efficiently penetrated cancerous cells and localized mainly in lipid-containing and/or other nonpolar subcellular compartments. In the zebrafish embryo, the peptides remained in the bloodstream upon injection into the cardinal vein, presumably adhering to lipoproteins and/or microvesicles. They did not diffuse into any tissue to a significant extent during the first 3 h after administration. This study demonstrated the utility of fluorescent labeling by double-emission labels to evaluate biol. active peptides as potential drug candidates in vivo.

Frontiers in Chemistry (Lausanne, Switzerland) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Safety of 2-Chlorotrityl chloride.

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

Peristyy, Anton published the artcileIon-exchange properties of High Pressure High Temperature synthetic diamond, HPLC of Formula: 23616-79-7, the publication is Diamond and Related Materials (2017), 131-139, database is CAplus.

The adsorption and chromatog. properties of microparticulated diamond (1-2 μm and 4-6 μm fractions) from high pressure and high temperature synthesis (HPHT diamond) are investigated, with a focus on their cation-exchange capacity. Several adsorbents were prepared, either by wet oxidation of the surface of HPHT with H₂O₂/H₂SO₄ or HNO₃/H₂SO₄ mixtures, or by oxidation in air at 700 °C, or following a four-step reduction using LiAlH₄ and n-butyllithium. The zeta-potential profiles as a function of pH and ion-exchange capacities were measured for the prepared adsorbents as well as isotherms of adsorption. The ion-exchange selectivity of oxidised HPHT diamond was studied towards alkali, alk.-earth and transition metal cations.

Diamond and Related Materials published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, HPLC of Formula: 23616-79-7.

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

Matusik, Jakub published the artcileNMR and IR study of kaolinite intercalation compounds with benzylalkylammonium chlorides, Safety of N-Benzyl-N,N-dibutylbutan-1-aminium chloride, the publication is Applied Clay Science (2013), 426-432, database is CAplus.

Novel intercalation compounds of kaolinite with selected benzylalkylammonium chlorides, obtained using methoxy-kaolinite as a precursor, were characterized by ¹³C, ²⁷Al, and ²⁹Si solid-state NMR and IR (FTIR) spectroscopy. The analyses allowed the confirmation of both the formation and structure of precursors (kaolinite-DMSO and methoxy-kaolinite), as well as the intercalation compounds According to the ¹³C CP-MAS NMR spectra of the derivatives with benzyltrimethylammonium chloride (B1), the Me groups of the mols., arranged in a monolayer, were keyed into the ditrigonal holes of the kaolinite tetrahedral sheet. The local environment of internal carbons of benzyltributylammonium chloride (B2) Bu chains was mostly perturbed during intercalation. In turn, the structure of the benzyldimethylhexadecylammonium chloride (B5) after intercalation was changed from the solid-like to liquid-like conformation with an increase of gauche conformers, which was attested both by ¹³C CP-MAS NMR and FTIR. The ¹³C CP-MAS NMR anal. confirmed that the methoxyl groups attached to the octahedral surface of methoxy-kaolinite were not affected by intercalation. The ²⁷Al and ²⁹Si MAS NMR did not show any significant distortion of the Al-octahedra and Si-tetrahedra after intercalation of the organic salts. The IR analyses indicated an increased amount of intercalated water with the increase of initial salt concentration

Applied Clay Science published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Safety of N-Benzyl-N,N-dibutylbutan-1-aminium chloride.

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

Matusik, Jakub published the artcileCharacterization of kaolinite intercalation compounds with benzylalkylammonium chlorides using XRD, TGA/DTA and CHNS elemental analysis, Quality Control of 23616-79-7, the publication is Applied Clay Science (2013), 433-440, database is CAplus.

Kaolinite of high structural order was intercalated with selected ammonium salts containing a benzyl group: benzyltrimethylammonium (B1), benzyltributylammonium (B2), benzalkonium (B3), benzyldimethyltetradecylammonium (B4) and benzyldimethylhexadecylammonium (B5) chlorides. As a precursor, a methoxy-kaolinite was used which had OCH₃ methoxyl groups attached to the octahedral sheet. Such change of the octahedral surface character enabled intercalation of the salts which was not possible using other precursors (e.g. kaolinite-DMSO). The new intercalation compounds were characterized using XRD, thermal anal. (TGA/DTA) and CHNS elemental anal. The XRD revealed a significant shift of the kaolinite basal reflection to higher values range from ~14 Å (B1 salt) to ~38 Å (B5 salt) which confirmed the intercalation. The d values depended on the type of used salt as well as on its initial concentration The estimated space occupied by each mol. enabled to calculate the maximal molar capacity of the kaolinite in relation to the salts. The results were compared with the chem. formulas of the materials calculated from CHNS measurements. The TGA/DTA analyses were helpful to confirm the successful intercalation of the selected salts as the thermal decomposition of the kaolinite derivatives took place at higher temperatures as compared to appropriate phys. mixtures

Applied Clay Science published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, Quality Control of 23616-79-7.

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

Klein, Philipp Michael published the artcileEfficient shielding of polyplexes using heterotelechelic polysarcosines, Recommanded Product: 2-Chlorotrityl chloride, the publication is Polymers (Basel, Switzerland) (2018), 10(6), 689/1-689/21, database is CAplus and MEDLINE.

Shielding agents are commonly used to shield polyelectrolyte complexes, e.g., polyplexes, from agglomeration and precipitation in complex media like blood, and thus enhance their in vivo circulation times. Since up to now primarily poly(ethylene glycol) (PEG) has been investigated to shield non-viral carriers for systemic delivery, we report on the use of polysarcosine (pSar) as a potential alternative for steric stabilization. A redox-sensitive, cationizable lipo-oligomer structure (containing two cholanic acids attached via a bioreducible disulfide linker to an oligoaminoamide backbone in T-shape configuration) was equipped with azide-functionality by solid phase supported synthesis. After mixing with small interfering RNA (siRNA), lipopolyplexes formed spontaneously and were further surface-functionalized with polysarcosines. Polysarcosine was synthesized by living controlled ring-opening polymerization using an azide-reactive dibenzo-aza-cyclooctyne-amine as an initiator. The shielding ability of the resulting formulations was investigated with biophys. assays and by near-IR fluorescence bioimaging in mice. The modification of ∼100 nm lipopolyplexes was only slightly increased upon functionalization. Cellular uptake into cells was strongly reduced by the pSar shielding. Moreover, polysarcosine-shielded polyplexes showed enhanced blood circulation times in bioimaging studies compared to unshielded polyplexes and similar to PEG-shielded polyplexes. Therefore, polysarcosine is a promising alternative for the shielding of non-viral, lipo-cationic polyplexes.

Polymers (Basel, Switzerland) published new progress about 42074-68-0. 42074-68-0 belongs to chlorides-buliding-blocks, auxiliary class Chloride,Benzyl chloride,Benzene, name is 2-Chlorotrityl chloride, and the molecular formula is C19H14Cl2, Recommanded Product: 2-Chlorotrityl chloride.

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

Goestl, Robert published the artcileSterically crowding the bridge of dithienylcyclopentenes for enhanced photoswitching performance, SDS of cas: 219537-97-0, the publication is Chemistry – A European Journal (2012), 18(45), 14282-14285, S14282/1-S14282/28, database is CAplus and MEDLINE.

Diarylethenes (DAEs) are photochromic mols. with outstanding physicochem. properties. They are ideal for incorporation into materials for optoelectronics because of their superior switching properties. DAEs undergo a reversible 6p electrocyclic reaction upon irradiation with light. The efficiency of the photocyclization reaction is governed by its quantum yield, which is dependent on the equilibrium between the parallel (p) and the antiparallel (ap) conformation. Steric repulsion, which is largely independent of the environment, can also be used to influence the equilibrium between p and ap conformation. Herein, we report a synthetically straightforward method for introducing bulky substituents into the bridge moiety of dithienylcyclopentenes, thus leading to derivatives exhibiting higher photocyclization quantum yield.

Chemistry – A European Journal published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, SDS of cas: 219537-97-0.

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

Golubeva, Elena N. published the artcileFormation of Active Catalysts in the System: Chlorocuprates-CCl₄-n-C₁₀H₂₂, COA of Formula: C19H34ClN, the publication is Journal of Physical Chemistry A (2009), 113(38), 10219-10223, database is CAplus and MEDLINE.

Transformations of anionic Cu^II chlorocomplexes have been studied under conditions of catalytic exchange reactions between carbon tetrachloride and n-alkanes. It was shown that chlorocuprates are just precursors and are easily reduced to the genuine catalysts, i.e., to the resp. Cu^I complexes. Both the composition and the geometric structure of the precursor (CuCl₄^2-) and, probably, the active site (CuCl₃^2-) have been investigated by several techniques (UV-vis spectroscopy, ESR, extended X-ray absorption fine structure (EXAFS), X-ray absorption near-edge structure (XANES), and static magnetic measurements). The dependence of the metathesis velocity on the [Cl^–]/[Cu] ratio was found to exhibit a maximum most likely corresponding to the highest content of trichlorocuprite CuCl₃^2-.

Journal of Physical Chemistry A published new progress about 23616-79-7. 23616-79-7 belongs to chlorides-buliding-blocks, auxiliary class Phase Transfer Catalyst, name is N-Benzyl-N,N-dibutylbutan-1-aminium chloride, and the molecular formula is C19H34ClN, COA of Formula: C19H34ClN.

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

Creemer, Cassidy published the artcileLight-controlled self-assembly of a dithienylethene bolaamphiphile in water, Category: chlorides-buliding-blocks, the publication is Dalton Transactions (2020), 49(26), 8846-8849, database is CAplus and MEDLINE.

The self-assembly of bolaamphiphiles comprised of a central photochromic dithienylethene (DTE) chromophore was investigated in aqueous media. Irradiation at 254 nm induced a conversion from the open to closed states of the DTE chromophores. Whereas, in water, irradiation produced a photostationary state of 20 : 80 (open/closed), in methanol the ratio improved to 10 : 90 (open/closed). The open → closed transition was accompanied by the formation of 1D nanofibers during incubation in darkness.

Dalton Transactions published new progress about 219537-97-0. 219537-97-0 belongs to chlorides-buliding-blocks, auxiliary class Fused/Partially Saturated Cycles,Cyclopentenes, name is 5-Chloro-3-[2-(5-chloro-2-methylthien-3-yl)cyclopent-1-en-1-yl]-2-methylthiophene, and the molecular formula is C15H14Cl2S2, Category: chlorides-buliding-blocks.

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