Synthesis of magnetically active poly(phenylenediamine)s in reversed micellar systems

Ichinohe, Daigo; Akagi, K.; Kise, Hideo

doi:10.1016/s0379-6779(97)80391-8

Cited by 15 publications

(15 citation statements)

References 5 publications

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“…The peak located at 335 cm À1 can be assigned to the p À p Ã transition of the benzenoid rings, and the band at 468 cm À1 suggests the existence of quinoid imine units (-C --N-). [27] The absence of peaks between 500 and 600 nm also indicates that there are no gold nanoparticles present in these polymer microparticles.…”

Section: Characterization Of the Pppd Polymer Microparticlesmentioning

confidence: 99%

Uniformly Shaped Poly(p‐phenylenediamine) Microparticles: Shape‐controlled Synthesis and Their Potential Application for the Removal of Lead Ions from Water

Wang

Jiang

et al. 2008

Adv Funct Materials

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A novel method for the shape‐controlled synthesis of uniformly‐shaped poly(p‐phenylenediamine) (PpPD) microparticles with different morphologies under ambient condition has been developed using HAuCl4 as an oxidant and poly(N‐vinylpyrrolidone) (PVP) as a surfactant. The results demonstrate that the morphologies of these microparticles can be varied from symmetrical spindle‐like to diamond‐like, centrosymmetric leaf‐like, and parallelogram‐like by tuning the concentration of reactants and their molar ratios. The length of these microparticles varies from 6 to 8 µm while the width can be tuned from 2 to 4 µm. The results demonstrate that PVP as a surfactant only plays a role in controlling the morphology of the polymer particles but has no influence on the polymer structures. UV‐Vis absorption spectroscopy shows the formation of a complex between polymer ligands and lead ions by detection of new absorption peaks. Even though the as‐prepared PpPD microparticles are only partly soluble, they still show an adsorptive affinity for lead ions.

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Section: Characterization Of the Pppd Polymer Microparticlesmentioning

confidence: 99%

Uniformly Shaped Poly(p‐phenylenediamine) Microparticles: Shape‐controlled Synthesis and Their Potential Application for the Removal of Lead Ions from Water

Wang

Jiang

et al. 2008

Adv Funct Materials

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“…Moreover, such compounds, with ortho nitro group, are starting materials for a convenient synthesis of carbazoles by cyclization of diarylamines (18). Solubilization of aromatic amines in reverse micelles is being used currently to prepare magnetically active organic materials such as polyaniline and polyphenylene diamine (19).…”

Section: Introductionmentioning

confidence: 99%

Binding of Nitrodiphenylamines to Reverse Micelles of AOT inn-Hexane and Carbon Tetrachloride: Solvent and Substituent Effects

Correa

Durantini

Silber

1998

Journal of Colloid and Interface Science

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“…Previously, we reported the oxidative polymerization of o-, m-, and p-phenylenediamines (PDA) by HRP in reversed micellar systems. 7 It was found that the obtained polymers were attracted to a permanent magnet at room temperature in the air. Analysis of the polymers by inductively coupled plasma (ICP) emission spectroscopy revealed that the polymers contained small amounts of Fe and Ni.…”

Section: Introductionmentioning

confidence: 98%

Oxidative polymerization of phenylenediamines by enzyme and magnetic properties of the products

Ichinohe

Muranaka

Kise

1998

J. Appl. Polym. Sci.

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Oxidative polymerization of m-phenylenediamine was carried out using H 2 O 2 as an oxidant and horseradish peroxidase as a catalyst in mixtures of aqueous buffer solution and 1,4-dioxane or in reversed micellar solutions. When the reaction mixture was brought into contact with a stainless steel stick, the obtained polymer responded to a permanent magnet at room temperature in the air. From the ICP emission spectroscopic analysis, it was found that these polymers contained small amounts of transition metals, such as Fe and Ni. The magnetic properties of the obtained polymers were studied with a superconducting quantum interference device (SQUID). The M (magnetization)-H (magnetic field) curves showed sigmoid behavior at 300 K, but did not exhibit a residual magnetization and a coercive force. These properties resembled those of soft ferromagnetic materials. The ferromagnetic behavior was indicated even at 800 K. Polymers of o-and p-phenylenediamines exhibited lower values of saturation magnetization than polymers of m-phenylenediamine.

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Synthesis of magnetically active poly(phenylenediamine)s in reversed micellar systems

Cited by 15 publications

References 5 publications

Uniformly Shaped Poly(p‐phenylenediamine) Microparticles: Shape‐controlled Synthesis and Their Potential Application for the Removal of Lead Ions from Water

Uniformly Shaped Poly(p‐phenylenediamine) Microparticles: Shape‐controlled Synthesis and Their Potential Application for the Removal of Lead Ions from Water

Binding of Nitrodiphenylamines to Reverse Micelles of AOT inn-Hexane and Carbon Tetrachloride: Solvent and Substituent Effects

Oxidative polymerization of phenylenediamines by enzyme and magnetic properties of the products

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