Biogenous iron oxide-immobilized palladium catalyst for the solvent-free Suzuki–Miyaura coupling reaction

Mandai, Kyoko; Korenaga, Takashi; Ema, Tadashi; Sakai, Takashi; Furutani, Mitsuaki; Hashimoto, Hideki; Takada, Jun

doi:10.1016/j.tetlet.2011.11.044

Cited by 55 publications

(24 citation statements)

References 41 publications

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“…As mentioned already, the sheath material of Leptothrix has a variety of attractive functions for industrial purposes [18][19][20][21][22]39,40]. We expect that the biologically created Si-rich sheaths will have additional functions that will be useful as an industrial material.…”

Section: Ed/xrd-results and Crystallinity Of Sheathsmentioning

confidence: 99%

“…To verify this assumption, we prepared modified media that contained various concentrations of sodium silicate in a study focused on the structural and compositional differences between strain OUMS1 grown in an SIGP and the modified Si-rich media. This study aimed to create new functional materials by culturing OUMS1, because natural Leptothrix sheaths have been noted to have a variety of industrial applications such as a lithium ion battery electrode material [18], a catalyst enhancer [19][20][21], and a pottery pigment [22]. Controlling the composition of the sheaths would further increase the usefulness of the material.…”

Section: Introductionmentioning

confidence: 99%

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Silicon-Rich, Iron Oxide Microtubular Sheath Produced by an Iron-Oxidizing Bacterium, Leptothrix sp. Strain OUMS1, in Culture

et al. 2014

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This study aimed to manipulate the texture and elemental composition of the novel sheaths produced by the iron-oxidizing bacterium Leptothrix in culture by altering components of the medium. When previously isolated strain OUMS1 was cultured in media (pH 7.0 throughout incubation) containing various levels of Si on a rotary shaker at 20 °C and 70 rpm for 14 days, the strain was able to reproduce in media with up to 300 ppm Si, and the hollow microtubular architecture of the sheath was maintained even at 300 ppm Si. The constitutional iron oxide phase changed from poorly crystalline lepidocrocite at 0 ppm Si to X-ray diffraction (XRD)-amorphous 2-line ferrihydrite at 100-300 ppm via their mixture phase with intermediate Si content . The results strongly indicate that the chemical character and crystallinity of the sheath texture can be regulated by culture conditions, especially components of the medium.

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Section: Ed/xrd-results and Crystallinity Of Sheathsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silicon-Rich, Iron Oxide Microtubular Sheath Produced by an Iron-Oxidizing Bacterium, Leptothrix sp. Strain OUMS1, in Culture

et al. 2014

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“…To date, a variety of industrial functions such as lithium-ion battery anode material [24,25], catalyst enhancer [26][27][28], and porcelain pigment [29] have been discovered for the sheaths of Leptothrix. Our previous study further indicated that the chemical character and crystallinity of the sheath matrix can be modified depending on the culture conditions for the strains, especially on the components of the medium [30].…”

Section: Introductionmentioning

confidence: 99%

Direct Adherence of Fe(III) Particles onto Sheaths of Leptothrix sp. Strain OUMS1 in Culture

et al. 2016

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“…Biogenic iron oxides have been applied as catalysts in reactions of oxidation 10,[18][19][20] or as an (immobilising) support for catalysts of very high activity. 2,[21][22][23] Investigations in this field are still scarce and concentrated only on a small number of reactions.…”

Section: Introductionmentioning

confidence: 99%

“…These peculiarities create uncertain composition of the materials based on biogenic iron (oxy)hydroxides. Despite some successful attempts to use biogenic materials for catalyst preparation without organics removal, 10,[21][22][23] in any case the synthesis of a catalyst requires known and constant composition of the used material(s) that will define its properties.…”

Section: Introductionmentioning

confidence: 99%

Treatment of Biogenic Iron-Containing Materials

Shopska¹,

Cherkezova‐Zheleva²,

Paneva³

et al. 2014

Croat. Chem. Acta

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Abstract. Biogenic iron oxides could find application in catalysis but their structure and composition should be well characterized. The content of organic rests due to their origin should also be controlled. Samples of natural biomass and biomass obtained after cultivation in Adler's medium of the SphaerotilusLeptothrix group of bacteria were treated by different techniques to reduce or totally remove the organic residues. The aim of the study was to find procedures, which prevent changes in the oxidation state of the iron and of the type of iron-containing compound(s) during treatment. Mössbauer spectroscopy, IRS, DTA, and SEM were used in the study. Chemical treatment with H 2 O 2 or NaOH at room temperature did not significantly change the samples. Thermal treatment in oxidative flow mixture conducted up to 250 °C resulted in a transformation of the iron-containing phases only. The organic matter, which is included in the structure of the particles, cannot easily be affected. DTA revealed that removal of organic rests occurred in the interval of 250-600 °C. However, the transformation of the initial compounds could not be prevented using such a treatment.

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Biogenous iron oxide-immobilized palladium catalyst for the solvent-free Suzuki–Miyaura coupling reaction

Cited by 55 publications

References 41 publications

Silicon-Rich, Iron Oxide Microtubular Sheath Produced by an Iron-Oxidizing Bacterium, Leptothrix sp. Strain OUMS1, in Culture

Silicon-Rich, Iron Oxide Microtubular Sheath Produced by an Iron-Oxidizing Bacterium, Leptothrix sp. Strain OUMS1, in Culture

Direct Adherence of Fe(III) Particles onto Sheaths of Leptothrix sp. Strain OUMS1 in Culture

Treatment of Biogenic Iron-Containing Materials

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