Premium
Potentiometric Studies on Interactions of α‐ L ‐glutamic Acid Oligomers with Cu(II) in aqueous Solutions
Author(s) -
Mosoni L.,
PetitRamel M. M.,
Domard A.,
Rinaudo M.
Publication year - 1979
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1979.360180920
Subject(s) - potentiometric titration , oligomer , chemistry , aqueous solution , dissociation (chemistry) , polymerization , titration , dissociation constant , polymer , glutamic acid , polymer chemistry , inorganic chemistry , amino acid , organic chemistry , ion , receptor , biochemistry
Four oligomers of α‐ L ‐glutamic acid with ends blocked by nonionizable protecting groups were studied in 0.1 M NaClO 4 solution using potentiometric measurements. The titrations were analyzed using a pit‐mapping method. The results are compared with those obtained with the corresponding polymer. The successive dissociation constants of the carboxylic side chains are obtained for oligomers with degrees of polymerization varying from 1 to 6. Then the successive stability constants corresponding to the association Cu 2+ –oligomer are given, and the M p H q L r distribution is calculated for each oligomer introducing M H q L complexes.