| 초록 |
Two new layered zirconium phosphonates functionalized with amino groups were synthesized starting from aminomethylphosphonic acid in the presence of different mineralizers, and their structures were solved from powder X-ray diffraction data. Their topologies are unprecedented in zirconium phosphonate chemistry: the first, of formula ZrH[F 3 (O 3 PCH 2 NH 2 )], prepared in the presence of hydrofluoric acid, features uncommon ZrO 2 F 4 units and a remarkable thermal stability; the second, of formula Zr 2 H 2 [(C 2 O 4 ) 3 (O 3 PCH 2 NH 2 ) 2 ]·2H 2 O, prepared in the presence of oxalic acid, is based on ZrO 7 units with oxalate anions coordinated to the metal atom, which were never observed before in any zirconium phosphonate. In addition, the structure of another compound based on (2-aminoethyl)phosphonic acid is reported, which was the object of a previously published study. This compound has layered alpha;-type structure with minus;NH 3 + groups located in the interlayer space. All of the reported compounds were further characterized by means of vibrational spectroscopy, which provided important information on fine structural details that cannot be deduced from the powder X-ray diffraction data. Two new layered zirconium phosphonates functionalized with amino groups were synthesized starting from aminomethylphosphonic acid in the presence of different mineralizers, namely, hydrofluoric acid and oxalic acid. The crystal structures were solved from powder X-ray diffraction data, finding two unprecedented topologies. Vibrational spectroscopy was exploited to study these phosphonates to gain a deeper understanding of features that cannot be straightforwardly derived from diffraction techniques. Graphic Abstract ACS Electronic Supporting Info |
