Schiff base


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Schiff base

(shif),
condensation products of aldehydes and ketones with primary amines; the compounds are stable if there is at least one aryl group on the nitrogen or carbon. Compare: ketimine.
Synonym(s): aldimine

Schiff,

Hugo, German chemist in Florence, 1834-1915.
Kasten fluorescent Schiff reagents - see under Kasten
ninhydrin-Schiff stain for proteins
periodic acid-Schiff stain - a tissue-staining procedure. Synonym(s): PAS stain
Schiff base - condensation products of aldehydes and ketones with primary amine. Synonym(s): aldimine
Schiff reagent - used for aldehydes and in histochemistry to detect polysaccharides, DNA, and proteins.
References in periodicals archive ?
Schiff bases abbreviated as DHB-3-MAP, DHB-4-MAP, and DHB-6-MAP were synthesized by the condensation reactions of 2,4-dihydroxy benzaldehyde (DHB) with amino-methyl pyridines (2-amino-3-methylpyridine, 2-amino-4-methylpyridine, and 2-amino-6-methylpyridine), respectively [22].
Schiff bases of ethylenediamine as corrosion inhibitors of zinc in sulphuric acid.
At the alkaline pH, the free primaquine dissociated from the diphosphate salt would enter into reaction with the aldehdye groups of the oxidized polysaccharide leading to the formation of Schiff base linkage between the drug and the polysaccharide and we expected the covalent immobilization of the drug onto the polymer to be high.
What Birge noticed was that the energy required to shift the counterion in a Schiff base salt of the right structure is very small.
In the electronic spectra of Schiff base hard segment PUs, the aromatic bands at 255 and 264 nm are attributed to benzene [pi]-[pi]* transitions, whereas those observed at 315 and 321 nm are assigned to--CH=N--[pi]-[pi]* transitions.
16] Myeong Soon Park, Koon Ha Park, Kun Jun, Seung Rim Shin, Sea Wha Oh, 2002 "Synthesis of 2-(2-, 3-, and 4-pyridyl)benzoxazoles by the reaction of phenolic schiff bases with thianthrene cation radical" Journal of Heterocyclic Chemistry,Volume 39(6), pp.
The Bio-Rad instrument manual advises users to "let samples stand at 18-28 [degrees]C for at least 10 min to allow Schiff base removal" (this was increased recently to 15 min).
The presence of normal Schiff base bands indicated that these bands were intact in the complexes.
A Schiff base is a functional group that contains a carbon-nitrogen double bond with the nitrogen atom connected to an aryl or alkyl group but not hydrogen.