It was found that introduction of a substituent to pyridine-C atom in 3-pyridylboronic acid drastically increased the acidity of the pyridinium moiety, but decreased the acidity of the boron center, whereas the introduction to pyridine-N atom had no influence on the acidity of the boron center...
In general, the primary activator has a higher acidity and/or a greater number of acidic groups per molecule than the secondary activator. The primary activator is selected from compounds having a pKa of less than 8.0 and in some embodiments having two or more acidic groups per molecule, while...
The low acidity of trimethylamine (PKa = 9.81) permits the higher permeability of anions because they are dis- sociated from the functional groups [18,36]. The prepared functionalized inorganic/organic composite AEMs will contain a trimethylamine group responsible for higher permeability of anions, ...