Electron-transfer reaction of macromolecular cobalt(III) complex with [Ru(NH3)6]2+. Effect of microenvironment occupied by polymer backbone

Kurimura, Yoshimi; Kikuchi, Takashi; Tsuchida, Eishun

doi:10.1021/ma00194a025

Cited by 3 publications

(1 citation statement)

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“…(Refs. [4][5][6][7][8][9][10] The conformational transition in poly(methacry1ic acid) (PMA) has been investigated using spectroscopy and potentiometric titration techniques. (Refs.…”

Section: Introductionmentioning

confidence: 99%

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Kurimura¹,

Sairench²,

Nakayama³

1992

Makromolekulare Chemie. Macromolecular Symposia

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The effects of the conformation of polymer chains on the electron transfer reactions and on the luminescence behavior of Ru(bpy)32+ in aqueous solutions of cis‐Co(A)PAA and cis‐Co(A)PMA ((A) = (en)2(OH2), en = ethylenediamine, PAA = poly(acrylic acid), and PMA = poly(methacrylic acid)) have been investigated by means of several spectrophotometric techniques. The results of the electron‐transfer reactions of the polymer Co(III) complexes with Cr(bpy)32+ and Fe(edta)2− revealed that, at low pH, part of the Co(III) complex moieties could hardly be reduced even in the presence of a large excess of the reducing agents when the degree of coordination of the Co(III) complex is very low. The magnitude of the degree of reduction of the Co(III) complex and the rate constants of the electron‐transfer reactions of Co(A)PMA are considerably affected by the conformational transition of the polymer chains. The luminescence behavior of Ru(bpy)32+ in aqueous solutions of these polymer complexes at around pH 5 are essentially explained by the spontaneous luminescence decay of the ex cited state of Ru(bpy)32+ ions which are localized in the compact form of the polymer chains and that of the non‐shielded ones which have a similar lifetime as in water. Effects of the conformational transition of Co(A)PMA chain on the luminescence intensity and the lifetime of the excited state of Ru(bpy)32+ are discussed in the light of the results obtained.

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“…(Refs. [4][5][6][7][8][9][10] The conformational transition in poly(methacry1ic acid) (PMA) has been investigated using spectroscopy and potentiometric titration techniques. (Refs.…”

Section: Introductionmentioning

confidence: 99%

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Kurimura¹,

Sairench²,

Nakayama³

1992

Makromolekulare Chemie. Macromolecular Symposia

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Effect of the Conformation of Polymer Chain on the Reduction Rate of Polyacrylatopentaamminecobalt(III) by Polymer-Bound Ferrous Chelates and the Excited State of Tris(Bipyridine)Ruthenium(Ii)

Kurimura

Saito

Hiramatsu

et al. 1990

Journal of Macromolecular Science: Part A - Chemistry

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POLYMER SUPPORTED N,N′-BIS(SALICYLIDENE) HYDRAZINE Co(II) SCHIFF BASE COMPLEX AND ITS CATALYTIC ACTIVITY

Gupta

Kadir

Chand

2002

Journal of Macromolecular Science, Part A

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Electron-transfer reaction of macromolecular cobalt(III) complex with [Ru(NH3)6]2+. Effect of microenvironment occupied by polymer backbone

Cited by 3 publications

References 4 publications

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Effect of the Conformation of Polymer Chain on the Reduction Rate of Polyacrylatopentaamminecobalt(III) by Polymer-Bound Ferrous Chelates and the Excited State of Tris(Bipyridine)Ruthenium(Ii)

POLYMER SUPPORTED N,N′-BIS(SALICYLIDENE) HYDRAZINE Co(II) SCHIFF BASE COMPLEX AND ITS CATALYTIC ACTIVITY

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Electron-transfer reaction of macromolecular cobalt(III) complex with [Ru(NH3)6]2+. Effect of microenvironment occupied by polymer backbone

Cited by 3 publications

References 4 publications

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)3a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)3a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Effect of the Conformation of Polymer Chain on the Reduction Rate of Polyacrylatopentaamminecobalt(III) by Polymer-Bound Ferrous Chelates and the Excited State of Tris(Bipyridine)Ruthenium(Ii)

POLYMER SUPPORTED N,N′-BIS(SALICYLIDENE) HYDRAZINE Co(II) SCHIFF BASE COMPLEX AND ITS CATALYTIC ACTIVITY

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Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes

Conformational effects of polymer chains on the electron‐transfer reactions and luminescence behavior of Ru(bpy)₃^a+ in aqueous solutions of poly(acrylic acid)‐ and poly(methacrylic acid)‐bound Co (III) complexes