Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Picolinamide, is researched, Molecular C6H6N2O, CAS is 1452-77-3, about Dipicolinamide functionalized titania for highly efficient sorption of tetra and hexavalent actinide.Electric Literature of C6H6N2O.
Dipicolinamide functionalized titania particles have been synthesized for efficient decontamination of uranyl and thorium ions from aqueous acidic waste solution Langmuir isotherm was found to be predominating with maximum sorption capacity of 125 mg/g for Th and 111 mg/g for U, resp. The sorption was found to follow pseudo 2nd order kinetics predominately, with rate constant 8.6E-04 mg g-1 min-1 for Th and 6.1E-04 mg g-1 min-1 for U, resp. Up to 200 kGy of gamma irradiation, not much deterioration in extraction performance of sorbent material was observed Three contacts of 0.1 M aqueous solutions of oxalic acid and sodium carbonate were found to be effective in quant. elution of Th4+ and UO2+2 from the loaded sorbent, resp. The sorption of U and Th on dipicolinamide functionalized titania was evidenced by SEM images, elemental mapping and the EDX. Theor. investigation revealed that, the solution phase free energy of sorption (ΔGsol) was higher for Th4+ (-114.1 kcal mol-1) compared to UO2+2 (-80.41 kcal mol-1).
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Reference:
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem