Acid dissociation constants of melamine derivatives from density functional theory calculations.
Melamine and its hydrolysis products (ammeline, ammelide, and cyanuric acid) recently attracted great attention as major food contaminants. Developing analytical tools to quantify them requires exact knowledge of their acid dissociation constants (pK(a) values). Herein, we calculated the pK(a) values of these melamine derivatives in water, using a density functional theory quantum mechanical method [B3LYP/6-311++G(d,p)] in combination with the Poisson-Boltzmann continuum solvation model. The excellent agreement of the calculated values with the experimental ones shows that our method can be used to predict such properties of other food contaminants.
Jang
Yun Hee
YH
Department of Materials Science and Engineering, Gwangju Institute of Science and Technology, Gwangju 500-712, Korea.
Hwang
Sungu
S
Chang
Seo Bong
SB
Ku
Jamin
J
Chung
Doo Soo
DS
D003198:Computer Simulation; D006863:Hydrogen-Ion Concentration; D008956:Models, Chemical; D011789:Quantum Theory; D012995:Solubility