μ-Nitrido-bridged iron phthalocyanine dimer bearing eight peripheral 12-crown-4 units and its methane oxidation activity

2020 ◽  
Vol 44 (44) ◽  
pp. 19179-19183
Author(s):  
Yasuyuki Yamada ◽  
Jyunichi Kura ◽  
Yuka Toyoda ◽  
Kentaro Tanaka
Keyword(s):  
Methane Oxidation ◽  
Iron Phthalocyanine ◽  
Oxidation Activity

A novel μ-nitrido-bridged iron phthalocyanine dimer with eight peripheral 12-crown-4 units was synthesized and its methane oxidation activity was investigated.

scholarly journals Close-Stacking of Iron-Oxo-Based Double-Decker Complex on Graphite Surface Achieved High Catalytic CH4 Oxidation Activity Comparable to that of Methane Monooxygenases

2021 ◽  
Author(s):  
Yasuyuki Yamada ◽  
Kentaro Morita ◽  
Takuya Sugiura ◽  
Yuka Toyoda ◽  
Nozomi Mihara ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methane Oxidation ◽  
Graphite Surface ◽  
Iron Phthalocyanine ◽  
Ch4 Oxidation ◽  
Oxidation Activity ◽  
Phthalocyanine Complex ◽  
Double Decker ◽  
Dinuclear Iron

<div><div><div><p>Herein, we report that the close-stacking of a double-decker-type dinuclear iron phthalocyanine complex on a graphite surface is effective for achieving high methane oxidation activity, comparable to those of certain MMOs, in an aqueous solution. </p></div></div></div>

Synthesis of a Monocationic μ–Nitrido-Bridged Iron Porphycene Dimer and Its Methane Oxidation Activity

2021 ◽  
Author(s):  
Yasuyuki Yamada ◽  
Yusuke Miwa ◽  
Yuka Toyoda ◽  
Tomoo Yamaguchi ◽  
Shigehisa Akine ◽  
...  
Keyword(s):  
Methane Oxidation ◽  
Structural Analog ◽  
Iron Phthalocyanine ◽  
Oxidation Activity

Herein, we report on the synthesis of a monocationic μ-nitrido-bridged iron porphycene dimer, a structural analog of a monocationic μ-nitrido-bridged iron phthalocyanine dimer, which is known to be one of...

High catalytic methane oxidation activity of monocationic μ-nitrido-bridged iron phthalocyanine dimer with sixteen methyl groups

2021 ◽  
Author(s):  
Yasuyuki Yamada ◽  
Jyunichi Kura ◽  
Yuka Toyoda ◽  
Kentaro Tanaka
Keyword(s):  
Methane Oxidation ◽  
Methyl Groups ◽  
Iron Phthalocyanine ◽  
Oxidation Activity ◽  
Catalytic Methane Oxidation

High catalytic methane oxidation activity of a μ-nitrido-bridged iron phthalocyanine dimer was achieved by introducing 16 electron-donating methyl groups onto the phthalocyanine rings.

scholarly journals Close-Stacking of Iron-Oxo-Based Double-Decker Complex on Graphite Surface Achieved High Catalytic CH4 Oxidation Activity Comparable to that of Methane Monooxygenases

2021 ◽  
Author(s):  
Yasuyuki Yamada ◽  
Kentaro Morita ◽  
Takuya Sugiura ◽  
Yuka Toyoda ◽  
Nozomi Mihara ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methane Oxidation ◽  
Graphite Surface ◽  
Iron Phthalocyanine ◽  
Ch4 Oxidation ◽  
Oxidation Activity ◽  
Phthalocyanine Complex ◽  
Double Decker ◽  
Dinuclear Iron

<div><div><div><p>Herein, we report that the close-stacking of a double-decker-type dinuclear iron phthalocyanine complex on a graphite surface is effective for achieving high methane oxidation activity, comparable to those of certain MMOs, in an aqueous solution. </p></div></div></div>

scholarly journals Anaerobic oxidation of methane in grassland soils used for cattle husbandry

2012 ◽  
Vol 9 (10) ◽  
pp. 3891-3899 ◽  
Author(s):  
A. Bannert ◽  
C. Bogen ◽  
J. Esperschütz ◽  
A. Koubová ◽  
F. Buegger ◽  
...  
Keyword(s):  
Methane Oxidation ◽  
Enrichment Culture ◽  
Anaerobic Oxidation Of Methane ◽  
Anaerobic Oxidation ◽  
Incubation Experiment ◽  
Nutrient Source ◽  
Oxidation Activity ◽  
Oxidation Of Methane ◽  
Cattle Husbandry

Abstract. While the importance of anaerobic methane oxidation has been reported for marine ecosystems, the role of this process in soils is still questionable. Grasslands used as pastures for cattle overwintering show an increase in anaerobic soil micro-sites caused by animal treading and excrement deposition. Therefore, anaerobic potential methane oxidation activity of severely impacted soil from a cattle winter pasture was investigated in an incubation experiment under anaerobic conditions using 13C-labelled methane. We were able to detect a high microbial activity utilizing CH4 as nutrient source shown by the respiration of 13CO2. Measurements of possible terminal electron acceptors for anaerobic oxidation of methane were carried out. Soil sulfate concentrations were too low to explain the oxidation of the amount of methane added, but enough nitrate and iron(III) were detected. However, only nitrate was consumed during the experiment. 13C-PLFA analyses clearly showed the utilization of CH4 as nutrient source mainly by organisms harbouring 16:1ω7 PLFAs. These lipids were also found as most 13C-enriched fatty acids by Raghoebarsing et al. (2006) after addition of 13CH4 to an enrichment culture coupling denitrification of nitrate to anaerobic oxidation of methane. This might be an indication for anaerobic oxidation of methane by relatives of "Candidatus Methylomirabilis oxyfera" in the investigated grassland soil under the conditions of the incubation experiment.

scholarly journals Abundance and Activity of Methanotrophic Bacteria in Littoral and Profundal Sediments of Lake Constance (Germany)

2008 ◽  
Vol 75 (1) ◽  
pp. 119-126 ◽  
Author(s):  
M. Rahalkar ◽  
J. Deutzmann ◽  
B. Schink ◽  
I. Bussmann
Keyword(s):  
Methane Oxidation ◽  
Lake Constance ◽  
Type I ◽  
Sediment Depth ◽  
Oxidation Activity ◽  
Oxidation Rates ◽  
Methane Oxidizing Bacteria ◽  
Littoral Sediment ◽  
Sediment Layers

ABSTRACT The abundances and activities of aerobic methane-oxidizing bacteria (MOB) were compared in depth profiles of littoral and profundal sediments of Lake Constance, Germany. Abundances were determined by quantitative PCR (qPCR) targeting the pmoA gene and by fluorescence in situ hybridization (FISH), and data were compared to methane oxidation rates calculated from high-resolution concentration profiles. qPCR using type I MOB-specific pmoA primers indicated that type I MOB represented a major proportion in both sediments at all depths. FISH indicated that in both sediments, type I MOB outnumbered type II MOB at least fourfold. Results obtained with both techniques indicated that in the littoral sediment, the highest numbers of methanotrophs were found at a depth of 2 to 3 cm, corresponding to the zone of highest methane oxidation activity, although no oxygen could be detected in this zone. In the profundal sediment, highest methane oxidation activities were found at a depth of 1 to 2 cm, while MOB abundance decreased gradually with sediment depth. In both sediments, MOB were also present at high numbers in deeper sediment layers where no methane oxidation activity could be observed.

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