jp5b03393_si_001.pdf (196.82 kB)
Structure and Redox Properties of 5‑Amino-3-nitro‑1H‑1,2,4-triazole (ANTA) Adsorbed on a Silica Surface: A DFT M05 Computational Study
journal contribution
posted on 2015-07-23, 00:00 authored by Liudmyla
K. Sviatenko, Leonid Gorb, Frances C. Hill, Danuta Leszczynska, Jerzy LeszczynskiA cluster approximation was applied
at the M05/tzvp level to model
an adsorption of 5-amino-3-nitro-1H-1,2,4-triazole
(ANTA) on the (001) surface of α-quartz. Structures of the obtained
ANTA–silica complexes confirm a nearly parallel orientation
of the nitro compound toward the surface. The atoms in molecules (AIM)
method was applied to analyze binding between ANTA and the silica
surface. Attachment or loss of an electron was found to lead to a
significant deviation from coplanarity in the complexes and to a strengthening
of a hydrogen bonding. Redox properties of the adsorbed ANTA were
compared with those of gas-phase and hydrated species by calculation
of the ionization potential, electron affinity, oxidation and reduction
Gibbs free energies, and oxidation and reduction potentials. It was
shown that the adsorbed ANTA has a lower ability to undergo redox
transformations as compared to that of the hydrated one.