Vibrational spectra of two Fe(III)/EDTA complexes useful for iron supplementation

Elucidating some issues regarding the synthesis of superparamagnetic-like single crystalline micrometric Fe3O4 during the hydrothermal process

“…Also 736 cm -1 can be attributed to Fe-O stretching (octahedral and tetrahedral).The 864 cm −1 is attributed to bending vibration bands of CO3 group, and 1,414 cm −1 is attributed to stretching vibration bands of CO 3 group [11]. A wide and strong band at 3100-3630 cm -1 centered at 3434cm -1 could be assigned to O-H vibrations [12,13] or from the adsorbed water molecules [14,15], which is consistent with EDAX findings. The weak peak placed at approximately 2924 cm -1 and 2973 cm -1 could be attributed to symmetric C-H vibrations [16].…”

A Comparative Study of [CaEDTA]2– and [MgEDTA]2–: Structural and Dynamical Insights from Quantum Mechanical Charge Field Molecular Dynamics

“…2,30 Because of the manifold ways EDTA is used on a daily basis, it is important to investigate the structural and dynamical properties of EDTA complexes in the aqueous medium. In fact, many studies have been carried out so far to characterise metal chelating EDTA in the solid 5,[10][11][12][13][14][15][18][19][20]23,31 and liquid phase [6][7][8][9]16,17,[20][21][22]24,25,32 using a number of different experimental methods including NMR, IR/RAMAN, X-RAY and EXAFS/XANES spectroscopy. It was concluded that the coordination behaviour of EDTA strongly depends on the nature of the complexed metal as well as on the pH value of the medium.…”

“…It was concluded that the coordination behaviour of EDTA strongly depends on the nature of the complexed metal as well as on the pH value of the medium. 7, 8,24 Basically a six-fold hexadentate coordination of EDTA to the metal is preferred at environmental conditions, 7,8,15,24 but also a pentadentate coordination of EDTA to the metal with a water molecule substituting a carboxyl group in the six-fold coordination sphere was observed. 10,23 Even a seven-fold coordination has been reported in the case of Ca(II), Mg(II), Na(I), Co(III) and Fe(III), where EDTA adapts a six-fold coordination and an additional water molecule is present in the coordination sphere of the metal.…”

“…10,23 Even a seven-fold coordination has been reported in the case of Ca(II), Mg(II), Na(I), Co(III) and Fe(III), where EDTA adapts a six-fold coordination and an additional water molecule is present in the coordination sphere of the metal. [12][13][14]18,19,24 Regarding the EDTA complexes of Ca and Mg generally a hexadentate six-fold coordination of EDTA with a distorted octahedral conformation has been reported. 7,15 Nevertheless, seven-fold coordination spheres adopting a pentagonal bi-pyramidal conformation have been mentioned in the literature.…”

Laser induced clot formation in blood treated by EDTA

“…The US FDA approved the use of EDTA for lead poisoning in July 16, 1953, under the brand name of Versenate, which was licensed to the pharmaceutical company Riker. It was approved as useful in trace elementsupplementation [8,9]. Such patients are accounted as medically compromised in dental clinics for the consequence of severe bleeding after tooth extraction and other minor operation.…”