1] is due to C=O asymmetric stretching in carboxylate anion
that is reconfirmed by another peak at 1411 [cm.
Selected ion monitoring was performed to monitor the carboxylate anion
(M-181; loss of [sup.
Following formation of the carboxylate anion
, decarboxylation would generate the fragment ion detected at m/z 275.
The catalyst 2MI initiates the ring-opening reaction of the epoxy group of pDGEBA to form an oxygen anion, which subsequently picks up hydrogen from carboxyl in DACA to yield a carboxylate anion
[reaction (1) of Scheme 2].
2) of AHAMAA shows evidence of the coordination between the carboxylate anion
and aluminum ion at the strong absorption peak of 1658 [cm.
Complexation occurs between the lanthanide metal cation and the carboxylate anion
in the methacrylic segments of the random copolymer via ionic interactions.
These results showed that a highly expanded network can be generated by electrostatic repulsions among carboxylate anions
(-COO') during the polymerization process.
Previous studies show that the newly formed carboxylic acids are easily transformed into carboxylate anions
2% weight and not more than 20% weight of the composition; and a component selected from the group consisting of lithium salts, sodium salts, and potassium salts of fatty organic acids, wherein anions of the fatty organic acids include at least 10 carbon atoms, and cations are selected from the group consisting of sodium, lithium, and potassium; the component present in an amount, measured as its stoichiometric equivalent as lithium stearate with the stoichiometry being based on equal numbers of carboxylate anions
, such that the component has a ratio to the at least one oxyethylated aliphatic alcohol that is at least 0.
So we could observe various carboxylate anions
and kinetics of hydrolysis (Fig.
They derive many of their unique physical and mechanical properties from the ionic bonds that are formed between the zinc cations and the carboxylate anions
in the swelling media, which shields the carboxylate anions
and restricts effective anion-anion repulsion , would result in the reduction of the swelling ratio.