Open AccessFeatures of protolytic reactions in the ground and exited states in the presence of cationic polyelectrolyte
Author(s) -
A. S. Mugabutaeva,
Alina O. Naumova,
Petr Melnikov,
N. K. Zaytsev
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1093/1/012021
Subject(s) - cationic polymerization , polyelectrolyte , chemistry , excited state , salt (chemistry) , ground state , reaction rate constant , photochemistry , polymer chemistry , organic chemistry , kinetics , polymer , atomic physics , physics , quantum mechanics
Protolytic reactions in the ground and excited states for 2-naphthol and its sulfo derivatives were studied. It was revealed that in the presence of cationic polyelectrolyte, the acidity constant of the protolytic reaction in the ground state shifts to a more acidic region. It was also found that the value of the shift depends on the number of sulfo substituents in 2-naphthol derivatives. It reaches 1.2 units for the disodium salt of 2-naphthol-3,6,8-trisulfonic acid. At the same time, no significant effect of the polyelectrolyte on the acidity constant in the excited state pK a * was observed, and the photoprotolytic reaction proceeds in the same way as for an unimmobilized substance.