European Journal of Chemistry 2011, 2(2), 266-268. doi:10.5155/eurjchem.2.2.266-268.227

Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms


Yuuki Nakayama (1) , Kei Unoura (2) , Yasuhiro Igarashi (3) , Md. Jamil Hossain (4) , Hiroshi Sakiyama (5,*)

(1) Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
(2) Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
(3) Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
(4) Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
(5) Department of Material and Biological Chemistry, Faculty of Science, Yamagata University, Kojirakawa, Yamagata 990-8560, Japan
(*) Corresponding Author

Received: 03 Aug 2010, Accepted: 27 Oct 2010, Published: 30 Jun 2011

Abstract


Dimanganese(II) complexes [Mn2(bonp)(PhCO2)2]PF6 (1) and [Mn2(bocp)(PhCO2)2]PF6 (2) were synthesized with p-nitro- and p-chloro-substituted phenol-based dinucleating ligands bonp- [2,6-bis[bis(2-methoxyethyl)aminomethyl]-4-nitrophenolate anion] and bocp- [4-chloro-2,6-bis[bis(2-methoxyethyl)aminomethyl]phenolate anion], respectively, with the aim of controlling the redox potentials of the dimanganese center by changing the p-substituents in the dinucleating ligands. Cyclic voltammograms of 1 and 2 showed quasi-reversible oxidation processes, assigned to MnIIMnII/MnIIMnIII, at 1.17 and 1.00 V vs. Ag/AgCl, respectively. Compared to the previous p-methyl complex [Mn2(bomp)(PhCO2)2]PF6 (3) [bomp: 2,6-bis[bis(2-methoxyethyl)aminomethyl]-4-methylphenolate anion] (0.96 V vs. Ag/AgCl), the order of the potentials was 1(-NO2) > 2(-Cl) > 3(-CH3). Thus, the redox potentials of the dimanganese centers were controlled by the p-substituents in the dinucleating ligands.2_2_266_268_800

Keywords


Dimanganese(II) complex; Dinucleating ligand; Electrochemistry; p-Substituent; DFT; Redox potential

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DOI: 10.5155/eurjchem.2.2.266-268.227

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How to cite


Nakayama, Y.; Unoura, K.; Igarashi, Y.; Hossain, M.; Sakiyama, H. Eur. J. Chem. 2011, 2(2), 266-268. doi:10.5155/eurjchem.2.2.266-268.227
Nakayama, Y.; Unoura, K.; Igarashi, Y.; Hossain, M.; Sakiyama, H. Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms. Eur. J. Chem. 2011, 2(2), 266-268. doi:10.5155/eurjchem.2.2.266-268.227
Nakayama, Y., Unoura, K., Igarashi, Y., Hossain, M., & Sakiyama, H. (2011). Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms. European Journal of Chemistry, 2(2), 266-268. doi:10.5155/eurjchem.2.2.266-268.227
Nakayama, Yuuki, Kei Unoura, Yasuhiro Igarashi, Md. Jamil Hossain, & Hiroshi Sakiyama. "Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms." European Journal of Chemistry [Online], 2.2 (2011): 266-268. Web. 14 Nov. 2019
Nakayama, Yuuki, Unoura, Kei, Igarashi, Yasuhiro, Hossain, Md., AND Sakiyama, Hiroshi. "Synthesis and electrochemistry of dimanganese(II) complexes of phenol-based dinucleating ligands with four methoxyethyl chelating arms" European Journal of Chemistry [Online], Volume 2 Number 2 (30 June 2011)

DOI Link: https://doi.org/10.5155/eurjchem.2.2.266-268.227

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