Abstract
Sorption of histidine free base by monoionic montmorillonites was compared with that of histidine, HCl, using two different clays. The type of interlayer species formed and the corresponding reaction mechanisms were inferred from the amounts of amino acid sorbed, the cations exchanged and the IR spectra. Complex formation occurs between the amino acid and interlayer Cu ions. With other cations protonation of the amino acid and concomitant formation of metal hydroxides in the clay interlayers renders the cations partly nonexchangeable. The effect is most pronounced with Al but occurs also with Cu, Ca and Na ions. A strong tendency to peptide formation on heating under vacuo was observed with Al clays, but not with the other clays examined.
| Original language | English |
|---|---|
| Pages | 651-662 |
| Number of pages | 12 |
| State | Published - 1973 |
| Event | Int Clay Conf, 4th, Proc - Maidenhead, Engl Duration: 23 Jun 1972 → 30 Jun 1972 |
Conference
| Conference | Int Clay Conf, 4th, Proc |
|---|---|
| City | Maidenhead, Engl |
| Period | 23/06/72 → 30/06/72 |