There seems to be agreement on the reaction mechanism that the carbonyl group of formaldehyde molecule can react with the amino group on the surface of the material to form an imine
The results indicate that the trifunctional thione form of the ligand is chelated to the vanadium center through the pyridine nitrogen, imine
nitrogen and thione sulfur atoms.
The first step is the formation of an imine
between p-anisidine and ethyl glyoxalate using molecular sieve.
Isolation and analysis of products demonstrated that 40-70% of the imine
or diimine was reduced to the corresponding PPD, while 2050% was isolated as the alkylated product.
A third major enhancement to the Zycus Spend Analysis Solution -- iMine
-- helps less mature procurement teams progress both rapidly and efficiently through the early stages of strategic procurement transformation.
3] anion of CSA and the quinoid imine
coexists in the PAni doped with CSA .
Completion of the reaction to the imine
stage was monitored by GC-MS.
The nanosorbent has been made of polypropylene imine
dendrimer and its sorption ability is almost 1,000 times higher than usual sorbents.
All the above said exogenous cross-linkers, cross-linked with chitosan or with type-I collagen through; (i) covalent amide / imine
linkage; (ii) metal-protein complex formation (chromium cross-linking with type-I collagen); (iii) H-bond formation (between polyphenolic -OH group with different type of amino acids of type-I collagen molecule and amine group of chitosan) etc.
During the alkaline hydrolysis, ammonia was evolved and an orange-red color developed due to conjugated imine
1] can be attributed to the C-N stretching vibration in the quinoid imine
3] is an aryl or alkyl group that makes the Schiff base a stable imine