Photoinduced redox reactions of macrocyclic complexes with d7 (nickel(III)) metal ions. Photoredox processes of equatorial and axial ligands

1979 ◽  
Vol 18 (11) ◽  
pp. 3230-3233 ◽  
Author(s):  
G. Ferraudi
Keyword(s):  
Metal Ions ◽  
Redox Reactions ◽  
Macrocyclic Complexes ◽  
Axial Ligands

Effect of Doping Metal Ions on the Structure Transformation of Octahedral Layer Structure Manganese Oxide

2015 ◽  
Vol 723 ◽  
pp. 670-673
Author(s):  
Chen Liang Zhou ◽  
Bin Zheng Fang ◽  
Jian Wei Cao ◽  
Na Zhang ◽  
Jia Li Han ◽  
...  
Keyword(s):  
Metal Ions ◽  
Manganese Oxide ◽  
Powder Diffraction ◽  
Redox Reactions ◽  
Manganese Oxides ◽  
Layer Structure ◽  
Structure Transformation ◽  
Octahedral Layer ◽  
X Ray ◽  
Before And After

The Octahedral layer structure manganese oxides (Buserite and Birnessite) have been synthesized and modified by aging a MnOx gel which was produced from the redox reactions between Mn2+ and MnO4- in the presence of other metal cations (Mg2+, Ni2+, Co2+ or Cu2+). The present study investigates the structure transformation between Buserite and Birnessite using X-ray powder diffraction conducted on cation doped manganese oxides at different stages of before and after hydration. The results indicate that introduction of Mg2+ into the interlayer can completely achieve the structure transformation between Birnessite and Buserite after hydrated at 24h, and Ni2+ can partially reverse.

scholarly journals Biological and Electrochemical Studies of Macrocyclic Complexes of Iron and Cobalt

2020 ◽  
Vol 11 (1) ◽  
pp. 7393-7399
Keyword(s):  
Metal Ions ◽  
Analytical Techniques ◽  
Antimicrobial Activities ◽  
Macrocyclic Complexes ◽  
Oxidation States ◽  
Electron Transfer Rate ◽  
Standard Drug ◽  
E Coli ◽  
Heterogeneous Electron Transfer ◽  
Electron Transfer Rate Constant

In this work, we synthesized two tetraaza [N4] macrocyclic complexes of FeIII and CoII metal ions. The synthesized macrocyclic complexes were fully characterized by using various analytical techniques IR, UV-Vis, and MS. The spectral analysis indicated an octahedral geometry for both macrocyclic complexes. The electrochemical behavior was carried out using cyclic voltammetry on the Pt dish (0.031 cm2) electrode. The complexes were shown to have unusual oxidation states for the metal ions. The “heterogeneous electron transfer rate constant” (Ko) was also calculated using “Nicholson and Kochi’s method” and observed in the order: KoCoII > KoFeIII. The antimicrobial activities of two complexes were computed against E. coli, P. aeruginosa, B. cereus, S. aureus, whereas antifungal activities against C. Albicans and were contrasted with the standard drug “Gentamycin”.

Defect- and phase-engineering of Mn-mediated MoS2 nanosheets for ultrahigh electrochemical sensing of heavy metal ions: chemical interaction-driven in situ catalytic redox reactions

2018 ◽  
Vol 54 (67) ◽  
pp. 9329-9332 ◽  
Author(s):  
Wen-Yi Zhou ◽  
Shan-Shan Li ◽  
Xiang-Yu Xiao ◽  
Shi-Hua Chen ◽  
Jin-Huai Liu ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Metal Ions ◽  
Electrochemical Detection ◽  
Heavy Metal Ions ◽  
Redox Reactions ◽  
Chemical Interaction ◽  
Electrochemical Sensing ◽  
Mos2 Nanosheets ◽  
Phase Engineering

An ultrasensitive electrochemical detection of heavy metal ions is achieved via defect- and phase-engineering of Mn-mediated MoS2 nanosheets.

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