Biologically synthesized or bioinspired process-derived iron oxides as catalysts for living cationic polymerization of a vinyl ether

Kanazawa, Arihiro; Kanaoka, Shokyoku; Yagita, Naoki; Oaki, Yuya; Imai, Hiroaki; Oda, Mayumi; Arakaki, Atsushi; Matsunaga, Tadashi; Aoshima, Sadahito

doi:10.1039/c2cc36218j

Cited by 21 publications

(17 citation statements)

References 15 publications

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“…The expression control of the mms genes, as well as the other uncharacterized control factors from various magnetotactic bacterial strains, will enable us to synthesize magnetite particles with desired morphology and size to use in bacterial cells. The control of crystal size, shape, and surface structure of magnetite will expand the application of bacterial magnetite to separation technologies (Arakaki et al, 2008), as well as their use as catalysts for polymer synthesis (Kanazawa et al, 2012). …”

Section: Discussionmentioning

confidence: 99%

Co‐ordinated functions ofMmsproteins define the surface structure of cubo‐octahedral magnetite crystals in magnetotactic bacteria

Arakaki

Yamagishi

Fukuyo

et al. 2014

Molecular Microbiology

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SummaryMagnetotactic bacteria synthesize magnetosomes comprised of membrane-enveloped single crystalline magnetite (Fe3O4). The size and morphology of the nano-sized magnetite crystals (< 100 nm) are highly regulated and bacterial species dependent. However, the control mechanisms of magnetite crystal morphology remain largely unknown. The group of proteins, called Mms (Mms5, Mms6, Mms7, and Mms13), was previously isolated from the surface of cubooctahedral magnetite crystals in Magnetospirillum magneticum strain AMB-1. Analysis of an mms6 gene deletion mutant suggested that the Mms6 protein plays a major role in the regulation of magnetite crystal size and morphology. In this study, we constructed various mms gene deletion mutants and characterized the magnetite crystals formed by the mutant strains. Comparative analysis showed that all mms genes were involved in the promotion of crystal growth in different manners. The phenotypic characterization of magnetites also suggested that these proteins are involved in controlling the geometries of the crystal surface structures. Thus, the co-ordinated functions of Mms proteins regulate the morphology of the cubo-octahedral magnetite crystals in magnetotactic bacteria.

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Section: Discussionmentioning

confidence: 99%

Co‐ordinated functions ofMmsproteins define the surface structure of cubo‐octahedral magnetite crystals in magnetotactic bacteria

Arakaki

Yamagishi

Fukuyo

et al. 2014

Molecular Microbiology

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“…Learning the essence of magnetite biomineralization in bacteria Magnetic particles are currently important materials in bioindustries. [64][65][66] They are widely used in medical and diagnostic applications such as magnetic resonance imaging, cell separation, environmental inspections, drug delivery, and hyperthermia. 64,67 The major advantage of magnetic particles in such applications is that they can be easily manipulated by a magnetic force.…”

Section: Iron Oxide Biomineralization and Applicationsmentioning

confidence: 99%

Biomineralization-inspired synthesis of functional organic/inorganic hybrid materials: organic molecular control of self-organization of hybrids

et al. 2015

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Organisms produce various organic/inorganic hybrid materials, which are called biominerals. They form through the self-organization of organic molecules and inorganic elements under ambient conditions. Biominerals often have highly organized and hierarchical structures from nanometer to macroscopic length scales, resulting in their remarkable physical and chemical properties that cannot be obtained by simple accumulation of their organic and inorganic constituents. These observations motivate us to create novel functional materials exhibiting properties superior to conventional materials--both synthetic and natural. Herein, we introduce recent progress in understanding biomineralization processes at the molecular level and the development of organic/inorganic hybrid materials by these processes. We specifically outline fundamental molecular studies on silica, iron oxide, and calcium carbonate biomineralization and describe material synthesis based on these mechanisms. These approaches allow us to design a variety of advanced hybrid materials with desired morphologies, sizes, compositions, and structures through environmentally friendly synthetic routes using functions of organic molecules.

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“…Temperature-dependent sol-gel transitions of these reticulated polymers were also investigated. Highly-controlled polymerization of IBVE was achieved by utilizing an unusual initiating system HCl/LA/base (base = 1,4-dioxane or ethyl acetate) [106]. In this case, the chain-growth process was initiated at the Lewis acidic (LA) centers of Fe…”

Section: Living Cationic Polymerizationmentioning

confidence: 99%

Recent advances in applications of vinyl ether monomers for precise synthesis of custom-tailored polymers

Kirillov

Rodygin

Ananikov

2020

European Polymer Journal

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This review highlights recent progress in the synthesis and application of vinyl ethers (VEs) as monomers for modern homo-and co-polymerization processes. VEs can be easily prepared using a number of traditional synthetic protocols including a more sustainable and straightforward manner by reacting gaseous acetylene or calcium carbide with alcohols. The remarkably tunable chemistry of VEs allows designing and obtaining polymers with well-defined structures and controllable properties. Both VE homopolymerization and copolymerization systems are considered, and specific emphasis is given to the novel initiating systems and to the methods of stereocontrol.

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Biologically synthesized or bioinspired process-derived iron oxides as catalysts for living cationic polymerization of a vinyl ether

Abstract: Fe(3)O(4) synthesized by magnetotactic bacteria and α-Fe(2)O(3) synthesized via a microbial-mineralization-inspired process functioned as catalysts for the controlled cationic polymerization of a vinyl ether.

Cited by 21 publications

References 15 publications

Co‐ordinated functions ofMmsproteins define the surface structure of cubo‐octahedral magnetite crystals in magnetotactic bacteria

Co‐ordinated functions ofMmsproteins define the surface structure of cubo‐octahedral magnetite crystals in magnetotactic bacteria

Biomineralization-inspired synthesis of functional organic/inorganic hybrid materials: organic molecular control of self-organization of hybrids

Recent advances in applications of vinyl ether monomers for precise synthesis of custom-tailored polymers

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