Preparação do composto de associação entre citrato de ródio(II) e β-ciclodextrina

Abstract

PREPARATION OF ASSOCIATION COMPOUND BETWEEN RHODIUM(II) CITRATE AND β-CYCLODEXTRIN. Inclusion compound of rhodium(II) citrate with β-cyclodextrin in a 1:1 molar ratio was prepared using freeze-drying method. X-ray diffactometry, thermal analysis (TG/DTG/DSC), infrared and 1 H-NMR with 1 H spin lattice relaxation (1 H T 1) measurements and 13 C techniques were used to characterize the system prepared. The results indicated the formation of inclusion or association compounds between rhodium(II) citrate and β-cyclodextrin.

β‐Cyclodextrin PAMAM Dendrimer Surface Doped with Silver and Hexacyanoferrate (III) and its Applications for Dopamine Detection in Synthetic Samples

“…The other peaks occurred at 1627, 1157, 1080 and 1029 cm −1 . A new peak was observed at 1722 cm −1 attributed to stretching of carbonyl group ν(C=O) from citric acid [36]. Besides, the intensity of the peaks attributed to ν s (C−O−C), ν(C−C) and ν (C−O) stretching vibrations was increased.…”

“…This displacement indicates that the an intervalence complex was not been formed (Fe III ‐CN‐Ag I ) [38]. Furthermore, the broad band attributed to δ(O−H) bending vibration (3326 cm −1 ) is less intense and narrower when compared to β‐CD‐PAMAM spectra, suggesting a possible interaction between hydrogen atoms with the intervalence complex formed and breaking of hydrogen bond of β‐CD structure [36] [39].…”