Results 41 to 50 of about 23,873 (241)

Synthesis and Characterization of Novel Pyridinium Salts of (E)-2-(Pyridin-4-ylmethylene)hydrazine-1-carboximidamide

Molbank
We report the synthesis and characterization of the novel pyridinium salts from (E)-2-(pyridin-4-ylmethylene)hydrazine-1-carboximidamide. The pyridinium salts were obtained via the reaction of guanylhydrazone derived from pyridine-4-carbaldehyde with ...
Fatemeh Ataie Alani, Fatemeh Ahmadian, Alireza Houshdar Tehrani, Salimeh Amidi   +3 more
doaj   +1 more source

Reaction of Picolinamides with Ketones Producing a New Type of Heterocyclic Salts with an Imidazolidin-4-One Ring

Molecules, 2023
Reactions of picolinamides with 1,3-propanesultone in methanol followed by the treatment with ketones led to a series of previously unknown chemical transformations, yielding first pyridinium salts (2a–f), with a protonated endocyclic nitrogen atom, and ...
Eugenia P. Kramarova, Dmitry N. Lyakhmun, Dmitry V. Tarasenko, Sophia S. Borisevich, Edward M. Khamitov, Alfia R. Yusupova, Alexander A. Korlyukov, Alexander R. Romanenko, Tatiana A. Shmigol, Sergey Yu. Bylikin, Yuri I. Baukov, Vadim V. Negrebetsky   +11 more
doaj   +1 more source

Direct methane conversion to methanol by ionic liquid-dissolved platinum catalysts [PDF]

, 2006
Ternary systems of inorganic Pt salts and oxides, ionic liquids and concentrated sulfuric acid are effective at catalyzing the direct, selective oxidation of methane to methanol and appear to be more water tolerant than the Catalytica ...
Cheng, Jihong, Haught, Mark, Li, Zaiwei, Tang, Yongchun   +3 more
core   +2 more sources

From optically pure pyridinium salts to some new dihydro-2H-oxazolo[3,2-a]pyridines

Results in Chemistry, 2023
Treatment of 2,4,6-triphenylpiridinium salts, bearing a chiral β-hydroxy alkyl N-substituent with diluted aqueous sodium hydroxide afforded four new dihydrooxazolo[3,2a]pyridines,as an almost equimolar mixture of diastereomers.
R.G. Moura, P.R. Batista, L.C. Ducati, J. Gruber, L.F. Yamaguchi, L. Marzorati   +5 more
doaj   +1 more source

Biodegradable ion-exchange microspheres based on modified polylysines [PDF]

, 1995
Poly-L-lysine was synthesized via a triethylamine initiated ring-opening polymerization of Z-L-lysine-N'~-carboxyanhydride,\ud followed by deprotection of the E-amino group. Subsequently the polylysine was sulfamated using a pyridinium-sulfate complex to
Cremers, H.F.M., Feijen, J., Lens, J.P., Seymour, L.   +3 more
core   +4 more sources

The synthesis and characterization of polypeptide-adriamycin conjugates and its complexes with adriamycin. Part I [PDF]

, 1985
Poly(α-l-glutamic acid) (PGA) was grafted with amino acid and oligopeptide spacers up to 5 amino acids with the use of N,N'-carbonyldiimidazole and 2,3-dihydro-1,2-benz-isothiazole-3-on-1, 1-dioxide (saccharin) as an additive, and these polypeptides were
Eenink, M.J.D., Feijen, J., Heeswijk, W.A.R., Hoes, C.J.T., Potman, W., Stoffer, T.   +5 more
core   +2 more sources

Crystal structures of bis[4-(dimethylamino)pyridinium] tetrakis(thiocyanato-κN)manganate(II) and tris[4-(dimethylamino)pyridinium] pentakis(thiocyanato-κN)manganate(II)

Acta Crystallographica Section E: Crystallographic Communications, 2018
The crystal structures of the title salts, (C7H11N2)2[Mn(NCS)4] (1) and (C7H11N2)3[Mn(NCS)5] (2), consist of manganese(II) cations that are tetrahedrally (1) or trigonal–bipyramidally (2) coordinated to four or five terminal N-bonded thiocyanate ligands,
Tristan Neumann, Inke Jess, Christian Näther   +2 more
doaj   +1 more source

Organic–inorganic hybrid mixed-halide ZnII and CdII tetrahalometallates with the 2-methylimidazo[1,5-a]pyridinium cation

Acta Crystallographica Section E: Crystallographic Communications, 2022
Three isomorphous 0-D hybrid salts, namely, 2-methylimidazo[1,5-a]pyridinium trichloridoiodidozincate(II), (C8H9N2)2[ZnCl3.19I0.81] or [L]2[ZnCl3.19I0.81], (I), 2-methylimidazo[1,5-a]pyridinium dibromidodichloridocadmate(II), (C8H9N2)2[CdBr2.42Cl1.58] or
Olga Yu. Vassilyeva, Elena A. Buvaylo, Vladimir N. Kokozay, Brian W. Skelton   +3 more
doaj   +1 more source

Diquat Derivatives: Highly Active, Two-Dimensional Nonlinear Optical Chromophores with Potential Redox Switchability [PDF]

, 2010
In this article, we present a detailed study of structure−activity relationships in diquaternized 2,2′-bipyridyl (diquat) derivatives. Sixteen new chromophores have been synthesized, with variations in the amino electron donor substituents, π-conjugated ...
Abbotto A., Akdas-Kilig H., Alain V., Averseng F., Benjamin J. Coe, Bosshard Ch., Boubekeur-Lecaque L., Bruce S. Brunschwig, Brunschwig B. S., Bublitz G. U., Campo J., Cariati E., Champagne B., Cho B. R., Cifuentes M. P., Clays K., Clays K., Clays K., Clays K., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Coe B. J., Cui Y.-Z., Dhenaut C., Di Bella S., Di Bella S., Di Bella S., Ferguson, B., Figi H., Franz E., Geis W., Gillaizeau-Gauthier I., Heesink G. J. T., Hendrickx E., Hennrich G., Hilton A., Inge Asselberghs, Isborn C. M., James A. Harris, Jang S.-R., Javier Garín, Jeong M.-Y., Jesús Orduna, John Fielden, Kaino T., Kawase K., Kawase K., Kim H. M., Kim H. S., Kim H. S., Knoch F., Koen Clays, Kuzuya M., Kuzyk M. G., Kuzyk M. G., Kwon O., Lacroix P. G., Le Bouder T., Le Floc’h V., Lee O.-K., Li H.-P., Li H.-P., Lindner E., Liu C.-G., Liu Y., Madeleine Helliwell, Malaun M., Marder S. R., Marder S. R., Marder S. R., Marder S. R., Maury O., Maury O., McDonagh A. M., McEntee J., Meshulam G., Miles R. E., Mohan Kumar R., Mori Y., Moylan C. R., Muhammad S., Nalwa H. S., Nunzi F., Olbrechts G., Olbrechts G., Ostroverkhov V., Oudar J. L., Oudar J. L., Papadopoulos M. G., Powell C. E., Rigamonti L., Ruiz B., Ruiz B., Schneider A., Schneider A., Simon P. Foxon, Sohma S., Sporer C., Tai O. Y.-H., Taniuchi T., Taniuchi T., Vance F. W., Vance F. W., Verbiest T., Weyland T., Willetts A., Wolff J. J., Wolff J. J., Woodford J. N., Wortmann R., Wortmann R., Xu X.-L., Yang M.-L., Yang Z., Yang Z., Yang Z., Yitzchaik S., Zhou Y.-F., Zrig S., Zyss J., Zyss J.   +131 more
core   +2 more sources

Unlocking the Potential of MXene‐Based Electrochemical Biosensors: A Review of Biofunctionalization Strategies and Biosensing Principles

Advanced Materials Technologies, EarlyView.
ABSTRACT Electrochemical biosensors enable the accurate and timely detection of clinical biomarkers, improving healthcare and precision medicine. MXene nanosheets, a class of 2D transition metal carbides, nitrides, and carbonitrides, are promising materials for developing next‐generation electrochemical biosensors due to their unique physicochemical ...
Muhsin Ali, Sharat Chandra Barman, Isobel Steer, Aya H. Alshareef, Dana Alsulaiman   +4 more
wiley   +1 more source