A manganese() phthalocyanine under water-oxidation reaction: new findings

Phthalocyanines are a promising class of ligands for manganese because of their high binding affinity. This effect is suggested to be an important factor because phthalocyanines tightly bind manganese and stabilize it under moderate conditions. The strong donor power of phthalocyanine is also sugges...

Full description

Saved in:
Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2019, Vol.48 (32), p.12147-12158
Main Authors: Mousazade, Younes, Najafpour, Mohammad Mahdi, Bagheri, Robabeh, Jagli i, Zvonko, Singh, Jitendra Pal, Chae, Keun Hwa, Song, Zhenlun, Rodionova, Margarita V, Voloshin, Roman A, Shen, Jian-Ren, Ramakrishna, Seeram, Allakhverdiev, Suleyman I
Format: Article
Language:English
Subjects:
Catalysis
Electron microscopy
Energy transmission
Fine structure
Fourier transforms
Infrared analysis
Magnetic measurement
Manganese
Metal phthalocyanines
Microscopy
Oxidation
Structural analysis
X ray absorption
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Phthalocyanines are a promising class of ligands for manganese because of their high binding affinity. This effect is suggested to be an important factor because phthalocyanines tightly bind manganese and stabilize it under moderate conditions. The strong donor power of phthalocyanine is also suggested as a critical factor to stabilize high-valent manganese phthalocyanine. Herein, a manganese( ii ) phthalocyanine, which is stable under moderate conditions, was investigated under harsh electrochemical water oxidation. By scanning electron microscopy, transmission electron microscopy, energy dispersive spectrometry, X-ray diffraction, extended X-ray absorption fine structure analysis, X-ray absorption near edge structure analysis, chronoamperometry, magnetic measurements, Fourier-transform infrared spectroscopy, and electrochemical methods, it is shown that manganese phthalocyanine, a known molecular complex showing good stability under moderate conditions, could not withstand water oxidation catalysis and ultimately is altered to form catalytic oxide particles. Such nanosized Mn oxides are the true catalyst for water oxidation. Besides, we try to go a step forward to find an answer as to how Mn oxides form on the surface of the electrode. The decomposition reaction for a manganese complex under water oxidation was investigated.
ISSN:1477-9226
1477-9234
DOI:10.1039/c9dt01790a