Magnetic Properties of Novel Dendrimeric Iron(III) Complexes of the First Generation: EPR and Mössbauer Study

Domracheva, N. E.; Vorobeva, V.E.; Pyataev, A. V.; Ivanova, Anna G.

doi:10.1007/s00723-016-0792-6

Cited by 11 publications

(8 citation statements)

References 9 publications

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“…The difference in spectra of complexes C3 , C4 and C6 – C11 and complexes C1 , C2 , C5 and C12 agrees very well with the distinction in structure (monomers vs. supramolecular dimers). The above obtained values of the g ‐factor and zero field splitting are in a good accordance with those presented for the similar HS Fe(III) complexes in the literature ,,…”

Section: Resultssupporting

confidence: 91%

High‐Spin Mononuclear Iron(III) Complexes with Pentadentate Schiff Base Ligands: Structural Analysis and Magnetic Properties

et al. 2019

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Various substituted 2-hydroxybenzophenones were combined with aliphatic linear triamines to form pentadentate Schiff base ligands. Twelve new iron(III) complexes with the general formula [Fe(L n )X].mCH 3 CN (n = 1-10; X = N 3 À , NCS À or NCSe À ; m = 0-2) have been synthesized, and spectrally as well as structurally characterized. The structural analysis revealed a notable dependence of coordination polyhedra deformation as well as the spatial configuration of donor atoms on the length and symmetry of the Schiff base ligands. The magnetic proper-ties of the compounds were investigated and the permanent high-spin state (S = 5/2) for all reported compounds was established, and allowed calculation of zero-field-splitting parameters as well as coupling constants, which were further confirmed with DFT calculations. The solid-state EPR spectra were recorded at 293 K and 98 K, and in accordance with the magnetic measurements, showed a high-spin state in the measured temperature range.[a] Dr.

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Section: Resultssupporting

confidence: 91%

High‐Spin Mononuclear Iron(III) Complexes with Pentadentate Schiff Base Ligands: Structural Analysis and Magnetic Properties

et al. 2019

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“…In this study, compared with the CP-1 and CP-3, the signals for CP-1-Fe and CP-3-Fe were disappeared except for the water peak at d H 4.72 ppm, which was in accordance with the study reported by Domracheva et al 39 This may be due to metallic iron with paramagnetism, which interfere with the magnetic environment around the ligand. The presence of this region of the polysaccharide ligand caused the proton signal to be amplied and the relaxation time becomes longer to broaden the spectral peak, forming an apparently invisible iron core blind zone causing the peaks in this area to disappear.…”

Section: Discussionsupporting

confidence: 92%

Co-cultured Lepista sordida and Pholiota nameko polysaccharide-iron(iii) chelates exhibit good antioxidant activity

Jikang

2020

RSC Adv.

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“…d‐2). This might be due to the existence of the relatively large blinded zone near the high‐spin (S = 5/2) iron (III) centres (Jimenez & Moratal, ; Bertini et al ., ; Domracheva et al ., ), with AOS ligands obviously located entirely within this region, and the proton spectra signals were broadened to such an extent that they almost vanished. The existence of the ‘blind region’ (Fig.…”

Section: Resultsmentioning

confidence: 96%

Preparation and characterisation of a novel agar oligosaccharide–iron (III) complex

Teng

et al. 2018

Int J of Food Sci Tech

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This study aimed to synthesise a complex of agar oligosaccharides (AOS) with ferric iron and to evaluate its physicochemical and structural characteristics. Based on single factor, Plackett-Burman and response surface optimal experiments of three factors at three levels, the optimised chelate conditions of the AOSiron (III) complex were mass ratio of AOS to iron ions of 4.5:1 g:g, reaction temperature of 74°C and reaction time of 60 min. Under these conditions, the iron content and total sugar content were 14.03 AE 0.42% and 66.07 AE 0.96%, respectively. The physicochemical analysis showed that AOS-iron (III) was soluble and steady at physiological pH, and it was easily reduced to iron (II). The structural characteristics of AOS and AOS-iron (III) were analysed by Raman spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction and Nuclear magnetic resonance, and results showed that the iron (III) ions were chelated to AOS by -OH groups and -COOH groups and widely dispersed on the AOS backbone. Therefore, AOS-iron (III) could be a candidate for iron supplementation to treat iron deficiency anaemia.

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Magnetic Properties of Novel Dendrimeric Iron(III) Complexes of the First Generation: EPR and Mössbauer Study

Cited by 11 publications

References 9 publications

High‐Spin Mononuclear Iron(III) Complexes with Pentadentate Schiff Base Ligands: Structural Analysis and Magnetic Properties

High‐Spin Mononuclear Iron(III) Complexes with Pentadentate Schiff Base Ligands: Structural Analysis and Magnetic Properties

Co-cultured Lepista sordida and Pholiota nameko polysaccharide-iron(iii) chelates exhibit good antioxidant activity

Preparation and characterisation of a novel agar oligosaccharide–iron (III) complex

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