Results 241 to 250 of about 23,086 (291)
Some of the next articles are maybe not open access.
Experientia, 1964
Vond-Cycloserin ist die erste Schiffsche Base isoliert und charakterisiert worden. Bei Erhitzen in Athylalkohol unterbleibt die Umlagerung in einen Cycloserindimerenabkommling und ergibt Racemisierung. Es wird gefolgert, dass Aldehyde nicht auf das Stickstoffatom des Isoxazolidons reagieren und dass Dimerisation von Cycloserinnicht fur die Reaktion mit
openaire +2 more sources
Vond-Cycloserin ist die erste Schiffsche Base isoliert und charakterisiert worden. Bei Erhitzen in Athylalkohol unterbleibt die Umlagerung in einen Cycloserindimerenabkommling und ergibt Racemisierung. Es wird gefolgert, dass Aldehyde nicht auf das Stickstoffatom des Isoxazolidons reagieren und dass Dimerisation von Cycloserinnicht fur die Reaktion mit
openaire +2 more sources
Journal of Macromolecular Science: Part A - Chemistry, 1967
Abstract This paper compares the syntheses and the thermal stabilities of twelve related conjugated, pseudoconjugated, and nonconjugated Schiff base polymers of the general formula in which Z represents The polymers were prepared (a) by the condensation of Z(NH2)2 and p-C6 H4(CHO)2 in (1) solution and (2) as melts, and (b) by three new Schiff base ...
G. F. D'alelio +3 more
openaire +1 more source
Abstract This paper compares the syntheses and the thermal stabilities of twelve related conjugated, pseudoconjugated, and nonconjugated Schiff base polymers of the general formula in which Z represents The polymers were prepared (a) by the condensation of Z(NH2)2 and p-C6 H4(CHO)2 in (1) solution and (2) as melts, and (b) by three new Schiff base ...
G. F. D'alelio +3 more
openaire +1 more source
Schiff's bases of polyallylamine
Polymer Bulletin, 1987Schiffs bases of polyallylamine were synthesized by the reaction with four aldehydes. Salicylaldehyde (S)- and 2-pyridinecarboxaldehyde (P)-Schiff's base could be used as reverse osmosis membranes when crosslinked with divinyl sulfone, diacetyl or ethylene glycol diglycidyl ether.
Eizo Oikawa, Ken Yahata
openaire +1 more source
2023
This chapter provides an engaging overview of Schiff bases, highlighting their versatility in various chemical applications. Covering the synthesis, structural diversity, and multifaceted reactivity of Schiff bases, the introduction delves into their significance in coordination chemistry, bioinorganic systems, and medicinal chemistry.
openaire +1 more source
This chapter provides an engaging overview of Schiff bases, highlighting their versatility in various chemical applications. Covering the synthesis, structural diversity, and multifaceted reactivity of Schiff bases, the introduction delves into their significance in coordination chemistry, bioinorganic systems, and medicinal chemistry.
openaire +1 more source
Journal of the Chemical Society, Chemical Communications, 1976
Although very few examples of chemiluminescent Schiff bases have been described, and attempts to extend this class of reaction have hitherto been unsuccessful, it is now shown that these compounds are generally chemiluminescent on oxidation, with reasonable efficiency.
Frank McCapra, Alexander Burford
openaire +1 more source
Although very few examples of chemiluminescent Schiff bases have been described, and attempts to extend this class of reaction have hitherto been unsuccessful, it is now shown that these compounds are generally chemiluminescent on oxidation, with reasonable efficiency.
Frank McCapra, Alexander Burford
openaire +1 more source
Polymeric Schiff Bases. VI. The Direct Syntheses of Poly-Schiff Bases
Journal of Macromolecular Science: Part A - Chemistry, 1967Abstract The synthesis of black, high molecular weight polymeric Schiff bases directly from aryldiamines and aryldialdehydes by two methods is described. The first method utilizes benzylideneaniline as the reaction medium. The second method is a direct one-step synthesis involving the reaction of the aryldiamine, aryldialdehyde, aniline, and ...
G. F. D'alelio +3 more
openaire +1 more source
Tetrahedron, 1970
Abstract Various tautomeric forms have been postulated for pyridoxal Schiff bases, including the ring-chain tautomers aldimine ∡ aminoacetal (Ia ∡ Ib). We have found that acylation stabilizes either the aldimine or the aminoacetal form, depending on the structure of the Schiff base and the acylating agent used.
W. Korytnyk, H. Ahrens, N. Angelino
openaire +1 more source
Abstract Various tautomeric forms have been postulated for pyridoxal Schiff bases, including the ring-chain tautomers aldimine ∡ aminoacetal (Ia ∡ Ib). We have found that acylation stabilizes either the aldimine or the aminoacetal form, depending on the structure of the Schiff base and the acylating agent used.
W. Korytnyk, H. Ahrens, N. Angelino
openaire +1 more source
Acid-base equilibrium of the Schiff base in bacteriorhodopsin
Biochemistry, 1982Aqueous suspensions of dark-adapted bacteriorhodopsin (bR560) in the purple membrane of Halobacterium halobium are exposed to rapid jumps to high pH. Optical and resonance Raman measurements are carried out by using flow and stationary methods. Above pH congruent to 11.5 bR560 starts to be reversibly converted to a species absorbing at 460 nm (bR460 ...
S, Druckmann +4 more
openaire +2 more sources
1988
The Schiff base complexes described in this chapter are derived from ligands obtained by the reaction of aldehydes or ketones with amines. Ligation to manganese occurs through the nitrogen atom of the azomethine group (>C=N−), as well as through other functional groups present in the ligand, such as hydroxy and carboxy groups or other groups containing
L. J. Boucher +5 more
openaire +1 more source
The Schiff base complexes described in this chapter are derived from ligands obtained by the reaction of aldehydes or ketones with amines. Ligation to manganese occurs through the nitrogen atom of the azomethine group (>C=N−), as well as through other functional groups present in the ligand, such as hydroxy and carboxy groups or other groups containing
L. J. Boucher +5 more
openaire +1 more source
A review on applications of chitosan-based Schiff bases
International Journal of Biological Macromolecules, 2019Biopolymers have become very attractive as they are degradable, biocompatible, non-toxic and renewable. Due to the intrinsic reactive amino groups, chitosan is vibrant in the midst of other biopolymers. Using the versatility of these amino groups, various structural modifications have been accomplished on chitosan through certain chemical reactions ...
R, Antony +2 more
openaire +2 more sources