Synthesis, characterization and electrochemical investigations of heterocyclic-selenocarboxylate iron complexes

El‐khateeb, Mohammad; Abul‐Futouh, Hassan; Görls, Helmar; Weigand, Wolfgang; Almazahreh, Laith R.

doi:10.1016/j.ica.2016.04.033

Cited by 9 publications

(5 citation statements)

References 46 publications

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“…Figure 2 depicts the reduction oxidation activity of each proposed solution at various scan rates (v) in the potential (V) range of − 0.80 to 0.0 V. In general, the cathodic peaks were not distinct in the four formulations, while anodic peaks were slightly observable. e recorded current peak (i p ) decreased as slower v was applied, which is in good agreement with previous reports [24,26,28,31]. is result could be explained by considering the size of diffusion layer around the electrode and the time required to observe it.…”

Section: Determination Of the Proper Conditions For Cyclic Voltammetrsupporting

confidence: 92%

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

Handayani

Krisanti

Kartohardjono

et al. 2020

Journal of Chemistry

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A proper understanding of the properties of iron could increase the effectiveness of programmes for alleviating iron deficiency. Recently, encapsulation has been considered an appropriate method for protecting iron from injurious reactions. However, several events may occur during encapsulation processes, including changes in the iron’s oxidation state. Oxidation of ferrous iron is not desirable since the intestines can only absorb iron in the ferrous form. In this study, a cyclic voltammetry method was applied to investigate the likelihood of ferrous gluconate oxidation for the preparation of chitosan-tripolyphosphate microparticles. Then, the electrochemical properties of ferrous gluconate were confirmed experimentally. The oxidation rate of ferrous gluconate is also discussed in this paper. All the experimental solutions were formulated in detail to produce conditions similar to those of microparticle production. Cyclic voltammetry analysis was conducted using a configuration of three electrodes connected to an electrochemical analyser. Graphite, platinum wire, and Ag/AgCl were employed as the auxiliary, working, and reference electrodes, respectively. The cyclic voltammetry results show that the observed potential for each anodic peak shifted negatively in the presence of chitosan and sodium tripolyphosphate. Moreover, the rate of ferrous oxidation tended to increase during 75 min of experiments due to the presence of chitosan and sodium tripolyphosphate. These behaviours indicate the transformation of ferrous iron to ferric iron during iron microparticle preparation. Furthermore, these findings suggest that spray drying is a preferable method to minimise the oxidation reaction.

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Section: Determination Of the Proper Conditions For Cyclic Voltammetrsupporting

confidence: 92%

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

Handayani

Krisanti

Kartohardjono

et al. 2020

Journal of Chemistry

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“…These bands are within the same range observed for alkyl or aryl thio-or selenosulfonato analogs. 18,19,[36][37][38] The C=C frequency of these complexes (1656, 1660 cm -1 ) is higher than the corresponding frequency of CpFe(CO) 2 SCOCH=CR 2 (1619-1622 cm -1 ) 45 and that for CpFe(CO) 2 SeCOCH=CR 2 (1637-1649 cm -1 ). 17 This difference may be attributed to more resonance between the C=O and C=C bonds in the latter complexes.…”

Section: Synthesismentioning

confidence: 99%

“…These bands have been assigned relative to/in agreement with analogous reported systems. 17,18,25,26…”

Section: Uv-vis Spectra Of Complexes 1 Andmentioning

confidence: 99%

“…12 Iron selenocarboxylates show antifungal, antibacterial effects and are active substrates against cancer cells. 14,15 In the past two decades, we have developed a synthetic methodology for iron complexes of the general formula CpFe(CO) 2 EQ (E= S, Se, Q= COR, 16,17 SO 2 R, 18,19 COCO 2 R, 20 CO 2 R, 21,22 C(S)OR, 23,24 C(O) SR, 25,26 CS 2 R 27 ). This methodology involves the interaction of iron sulfides or selenide bridged dimers (l-E x )[CpFe(CO) 2 ] 2 (E = S, x = 2-4; E = Se, x = 1) with the corresponding chlorides (QCl).…”

Section: Introductionmentioning

confidence: 99%

“…This methodology involves the interaction of iron sulfides or selenide bridged dimers (l-E x )[CpFe(CO) 2 ] 2 (E = S, x = 2-4; E = Se, x = 1) with the corresponding chlorides (QCl). [16][17][18][19][20][21][22][23][24][25][26][27] The dicarbonyl complexes underwent photolytic substitution with AR 3 to give the substituted products CpFe(CO)(AR 3 )EQ (A= P; R= OEt, Ph. A= As, Sb; R= Ph).…”

Section: Introductionmentioning

confidence: 99%

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Cyclopentadienyl iron dicarbonyl styrene chalcogenosulfonates: synthesis and structure of CpFe(CO)2SeSO2CH=CHPh

et al. 2022

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In this contribution, we report the preparation of iron thiosulfonato complex CpFe(CO) 2 SSO 2 CH=CHPh (1) and its selenosulfonato analogue CpFe(CO) 2 SeSO 2 CH=CHPh (2) featuring styrene moiety. 1 and 2 are obtained by electrophilic attack of (l-E x )[CpFe(CO) 2 ] 2 (E = S; x = 2-4, E = Se; x = 1) on the sulfur atom of styrene sulfonyl chloride ClSO 2 CH=CHPh. The new compounds, 1 and 2 have been characterized by elemental analyses, IR, 1 H-, 13 C{ 1 H}-NMR, UV-Vis spectroscopy and the structure of 2 is determined by X-ray crystallography.

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Towards the synthesis of piano-stool iron complexes mediated by S-alkyl selenothiocarbonato ligands and their substitution reactions

et al. 2019

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Synthesis, characterization and electrochemical investigations of heterocyclic-selenocarboxylate iron complexes

Cited by 9 publications

References 46 publications

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

Cyclopentadienyl iron dicarbonyl styrene chalcogenosulfonates: synthesis and structure of CpFe(CO)2SeSO2CH=CHPh

Towards the synthesis of piano-stool iron complexes mediated by S-alkyl selenothiocarbonato ligands and their substitution reactions

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