Simultaneous selective extraction of nitramine explosives using molecularly imprinted polymer hollow spheres from post blast samples

Abstract

Solvents modulate the adsorption selectivity and adsorption capacity of a molecularly imprinted polymer to target compounds.

Dinitro Derivatives of 3,6,7,8-tetraazatricyclo[11,5. 11,5.12,4. 12,4]octa-1,4-diene – A DFT Treatment

“…1 1,5 .1 2,4 . 1 2,4 ]octa-1,4-diene) and its dinitro (dinitramine structures) derivatives are labeled as F0 and F1-F3, respectively (see Figure 1). F0 is isoconjugate with anion (multiple anion) of an even alternant hydrocarbon (AH) having equal starred and unstarred positions (N * =N 0 =4).…”

“…Note that non-Kekule' structures are unstable [32, Dinitro Derivatives of 3,6,7,8-tetraazatricyclo[1 1,5 . 1 1,5 .1 2,4 . 1 2,4 [34].…”

“…The nitramines are the most recently introduced class of organic nitrate explosives [1][2][3][4]. They have been subject of various experimental and theoretical studies [5][6][7][8][9][10][11].…”

Designing and controlling the morphology of spherical molecularly imprinted polymers

“…In this method, the step of removing cores is added on the basis of preparing core-shell MIPs, and selective etching is used to remove cores. Usually, PS, 158,159 SiO 2 , [160][161][162][163][164][165][166][167][168][169] mesoporous silica, [170][171][172][173] 174 CaCO 3 175 and Fe 3 O 4 @ SiO 2 [176][177][178][179] are used as the sacrificial material to prepare H-MIPs. This method is widely used because both organic and inorganic H-MIPs can be prepared.…”

Molecularly Imprinted Polymer Materials as Selective Recognition Sorbents for Explosives: A Review

“…One hundred mg of the optimized MIP was packed in a 1 mL SPE cartridge and successfully used to selectively extract CL-20 from soil samples. The same group further developed this idea using a new synthesis strategy to increase the porosity of the CL-20 imprinted polymers [51]. In this new study, a modified silica particle was first coated with a MIP shell before being removed using hydrofluoric acid to produce CL-20 imprinted hollow spheres (with an outer diameter of 0.25–0.5 µm and a thickness of 30–100 nm).…”