Investigation of electrostatic and hydrogen ionic (H+) field on the structural and quantum parameters of interaction cyanogen bromide (BrCN) with B12N12 nanocage, by density functional theory

In this work, the effects of static electric field (SEF) and ion field (hydrogen ions (nH+) on the interaction of cyanogen bromide (BrCN) with boron nitride nanocage (B12N12) using density function theory (DFT) and time-dependent density function theory (TD-DFT) have been investigated. Using optimized configurations the parameters of structural, electrical, quantum and thermodynamic, adsorption energy, quantum theory of atoms in molecules (QTAIM), reduced density gradient (RDG), nonlinear optical properties (NLO), ultraviolet-visible spectra ( UV-Vis) are calculated. The calculated results indicate that the amount of adsorption energy, enthalpy (∆H) and Gibbs free energy (∆G) are negative for all adsorption states and the adsorption process of cyanogen bromide on the surface of B12N12 nanocage is thermodynamically exothermic and spontaneous. With increasing electrical field strength from SEFz-0.005 a.u to SEFz-0.07 a.u and H+ ionic field, the adsorption energy increase and gap energy between the HOMO and LUMO orbitals significantly reduce, so the sensitivity of the nanocage to adsorb and detect of toxic cyanogen bromide increase.