Autonomous viscosity oscillation by reversible complex formation of terpyridine-terminated poly(ethylene glycol) in the BZ reaction

Ueno, Tomonaga; Bundo, Kaori; Akagi, Yuki; Sakai, Takamasa; Yoshida, Ryo

doi:10.1039/c0sm00788a

Cited by 43 publications

(37 citation statements)

References 34 publications

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“…It is expected that these polymer solutions and microgel dispersions are applied as novel functional fluid. We realized autonomous viscosity oscillations of a polymer solution based on different mechanisms, that is, an autonomous viscosity oscillation of polymer solutions coupled with metal-ligand association/dissociation between Ru and terpyridine (tpy), driven by the BZ reaction [42,43] (Fig. 5.14).…”

Section: Transmittance and Viscosity Oscillation Of Polymer Solution mentioning

confidence: 99%

Self-Oscillating Gels

Yoshida

2014

Soft Actuators

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Stimuli-responsive polymer gels and their application to smart materials have been widely studied. On the other hand, as a novel biomimetic gel, we developed gels with an autonomous self-oscillating function like a heart muscle, which was firstly reported in 1996. We designed the self-oscillating gels by utilizing the oscillating reaction, called the Belousov-Zhabotinsky (BZ) reaction which is recognized as a chemical model of the TCA cycle in organisms. The selfoscillating gel is composed of a poly(N-isopropylacrylamide) network in which the metal catalyst for the BZ reaction is covalently bonded. In a closed solution containing the reactants other than the catalyst, the gel undergoes spontaneous cyclic swelling-deswelling changes without any on-off switching of external stimuli. Their potential applications include several kinds of functional material systems, such as biomimetic soft-actuators and autonomous mass transport systems. Here recent progress on the novel polymer gels is introduced.

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Section: Transmittance and Viscosity Oscillation Of Polymer Solution mentioning

confidence: 99%

Self-Oscillating Gels

Yoshida

2014

Soft Actuators

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“…Different from these systems, the coupling of Ru(II)(tpy) 2 and the BZ reaction has been paid much attention as it provides a new approach to autonomous viscosity oscillation by dynamic interaction upon redox stimuli [18,19]. When the Ru ion is in the oxidized Ru(III) state, it forms a mono-complex (Ru(tpy) 3+ ) with a single terpyridine ligand, while in the reduced Ru(II) state, it forms a biscomplex (Ru(tpy) 2 2+ ).…”

Section: +mentioning

confidence: 99%

Preparation and characterization of poly(NIPAAm-co-AMPS-co-Fe(phen)3) self-oscillating copolymers

Ren

Zhang

et al. 2016

Colloid Polym Sci

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A novel self-oscillating copolymer was prepared by utilizing Fe(phen) 3 as the catalyst of the Belousov-Zhabotinsky (BZ) reaction. In this study, 2-acrylamido-2-methylpropane sulfonic acid (AMPS) was n e w l y i n t r o d u c e d i n t o t h e c o p o l y m e r o f Nisopropylacrylamide (NIPAAm) and Fe(phen) 3 as the H + providing agent for the BZ reaction. The results indicated that the copolymer solution underwent solubleinsoluble self-oscillation only in malonic acid (MA) and potassium bromate(KBrO 3 ) mixture solution, and the amplitudes were much bigger than those of poly(NIPAAm-co-Fe(phen) 3 ). That is to say, the novel copolymer succeeds in self-oscillating under acid-free conditions. Moreover, the oscillating characteristics were closely related to the content of AMPS in the copolymer.

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“…Further, we realized autonomous viscosity oscillations of polymer solutions coupled with metal-ligand association/dissociation between Ru and terpyridine (tpy) (Ueno et al, 2010;, driven by the BZ reaction. The tpy ligand for the Ru catalyst was attached to the terminals of branched poly(ethylene glycol) (PEG) (linear-, tetra-, and octa-PEG) (Figure 9.8).…”

Section: Autonomous Viscosity Oscillation By Reversible Complex Formamentioning

confidence: 99%

Self-oscillating polymer gels as novel biomimetic materials

Yoshida¹

2015

Biomimetic Technologies

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Autonomous viscosity oscillation by reversible complex formation of terpyridine-terminated poly(ethylene glycol) in the BZ reaction

Cited by 43 publications

References 34 publications

Self-Oscillating Gels

Self-Oscillating Gels

Preparation and characterization of poly(NIPAAm-co-AMPS-co-Fe(phen)3) self-oscillating copolymers

Self-oscillating polymer gels as novel biomimetic materials

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