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 ?
Nishat, Metal-based Schiff base polymers: preparation, spectral, thermal and their in vitro biological investigation, Designed Monomers and Polymers, 17, 217 (2014).
1H NMR spectra of the products showed doublet signals at 5.68 and 5.71 ppm (P-12, in CD[Cl.sub.3] and in DMSO-[d.sub.6], respectively) and 5.69 ppm (P-13, in CD[Cl.sub.3]) with [sup.2]JPH about 23 Hz which can be assigned to the CHP proton from their units formed by addition reaction between the polymeric H-phosphonate and the Schiff base. The NH proton signal is masked in the spectra taken in CD[Cl.sub.3] solution.
In Figure S2, a very strong band is below 400 nm for Schiff base (303 nm) and at 344 nm for complexes, due to ligand-centered [pi] [right arrow] [[pi].sup.*]/[pi] [right arrow] [[pi].sup.*] (most probably from phenolate oxygen donor atom) transitions (LLCT).
Recently, Al-Shemary and Zaidan [5] reported the successful synthesis and characterization of a new tetradented Schiff base ligand known as 2,2'(1E,1'E)-(ethane-1,2-diylbis (azan-1-yl-1-ylidene))bis(phenylmethan-1-yl-1-ylidene)dibenzoic acid (EDA2Bb) and its [Cu.sup.II], [Ni.sup.II], [Mn.sup.II], [Co.sup.II], and [Hg.sup.II] complexes.
Mass spectrum of the furan Schiff base ligand (H-MFMAQ) (Figure 1(a)) has final peak at 268 amu corresponding to the furan Schiff base ligand moiety [[C.sub.15][H.sub.12][N.sub.2][O.sub.3]] (atomic mass 268 amu) (Scheme 2).
Cobalt complexes with Schiff bases have received considerable attention in the fields of coordination chemistry and biological chemistry (6).
Salicylaldehyde-hydrazine hydrate Schiff base (la) showed the better inhibition to the growth of S.
Lei, "Surface-confined synthesis of one-dimensional schiff base polymers investigated by scanning tunneling microscopy," Journal of Physical Chemistry C, vol.