Results 71 to 80 of about 30,087 (242)

Acetylation of Raw Cotton for Oil Spill Cleanup Application: an FTIR and 13-C MAS NMR Spectroscopic Investigation [PDF]

open access: yes, 2004
Fourier transform infrared (FTIR) and 13C MAS NMR spectroscopy have been used to investigate the acetylation of raw cotton samples with acetic anhydride without solvents in the presence of different amounts of 4-dimethylaminopyridine (DMAP) catalyst ...
Adebajo, Moses, Frost, Raymond
core   +2 more sources

Flexible ionic pressure sensors: From migration‐electronic mechanisms to emerging iontronic paradigms

open access: yesInfoMat, EarlyView.
Mechanisms, materials, structures, and applications of the FIPSs. Abstract Flexible ionic pressure sensors (FIPS) have emerged as promising candidates for bridging the gap between electronics and biologically compatible interfaces. Unlike previous reviews, which focused primarily on materials or devices, this review presents a classification of FIPS ...
Mengjie Wang   +10 more
wiley   +1 more source

Corrosion Inhibition Properties of Corrosion Inhibitors to under-Deposit Corrosion of X65 Steel in CO2 Corrosion Conditions

open access: yesMolecules
Under-deposit corrosion is widely present in the pipelines of oil and gas production, causing significant corrosion damage. In this paper, a novel electrochemical cathodic-polarization method was carried out to accelerate the formation of CaCO3 scale on ...
Hai Lin   +7 more
doaj   +1 more source

Electron-deficient pyridinium salts/thiourea cooperative catalyzed O-glycosylation via activation of O-glycosyl trichloroacetimidate donors

open access: yesBeilstein Journal of Organic Chemistry, 2017
The glycosylation of O-glycosyl trichloroacetimidate donors using a synergistic catalytic system of electron-deficient pyridinium salts/aryl thiourea derivatives at room temperature is demonstrated. The acidity of the adduct formed by the 1,2-addition of
Mukta Shaw   +3 more
doaj   +1 more source

Synthesis and Structural Characterization of 1-[2-(5-Nitro-1H-indol-2-yl)phenyl]methylpyridinium Chloride

open access: yesMolecules, 2011
In the course of studies on hybrid antibacterials incorporating 2-aryl-5-nitro-1H-indole moieties as potential bacterial NorA efflux pump inhibitors, the compound 1-[2-(5-nitro-1H-indol-2-yl)phenyl]methylpyridinium chloride (2) was synthesized and ...
John B. Bremner   +3 more
doaj   +1 more source

3D Polymeric Nanonetworks: From Self‐Assembly to Advanced Fabrication

open access: yesMacromolecular Materials and Engineering, EarlyView.
This review provides the first systematic cross‐method comparison of fabrication techniques for 3D polymeric nanonetworks. It evaluates five key strategies—block copolymer self‐assembly, hyper‐crosslinking, template‐assisted methods, 3D printing, and nanolithography—across critical metrics including resolution, throughput, scalability, and material ...
Carlos G. Cobos   +2 more
wiley   +1 more source

4-(Dimethylamino)pyridinium tetrachlorido(quinoline-2-carboxylato-κ2N,O)stannate(IV)

open access: yesActa Crystallographica Section E, 2011
In the title salt, (C7H11N2)[SnCl4(C10H6NO2)], the SnIV atom is chelated by the N,O-bidentate carboxylate ions and four chloride ions, showing a distorted octahedral SnNOCl4 coordination.
Ezzatollah Najafi   +2 more
doaj   +1 more source

Reactions of biologically inspired hydride sources with B(C6F5)3 [PDF]

open access: yes, 2017
The combination of 1-benzyl-1,4-dihydropyridines with the strong Lewis acid, B(C6F5)3, generates a stable pyridinium borohydride species in high yields (94%) in as little as 10 min.
Luk, Louis Y. P.   +3 more
core   +1 more source

Catechol‐Containing Poly(2‐isopropyl‐2‐oxazoline): Synthesis and Thermoresponsive Behavior in Aqueous Salt Solutions

open access: yesMacromolecular Rapid Communications, EarlyView.
Polymers carrying catechol groups are interesting mussel‐inspired materials for wet adhesion applications or metal ion complexation for wastewater treatment. Here, catechol‐containing poly(2‐isopropyl‐2‐oxazoline)s were synthesized via microwave‐assisted cationic (co)polymerization and examined with regard to their thermoresponsive LCST behavior in ...
Niclas Madaj   +4 more
wiley   +1 more source

Crystal structure of 1-[(1-methyl-5-nitro-1H-imidazol-2-yl)methyl]pyridinium iodide

open access: yesActa Crystallographica Section E: Crystallographic Communications, 2015
In the title salt, C10H11N4O2+·I−, the asymmetric unit consists of a pyridinium cation bearning a (1-methyl-5-nitro-1H-imidazol-2-yl)methyl group at the N position and an iodide anion.
Roumaissa Belguedj   +4 more
doaj   +1 more source

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