Decay of an Ir(II) complex in aqueous solutions studied by pulse radiolysis. Effect of poly(styrenesulfonate) on the mechanism

Anny Slama-Schwok; Joseph Rabani

doi:10.1021/j100295a069

Decay of an Ir(II) complex in aqueous solutions studied by pulse radiolysis. Effect of poly(styrenesulfonate) on the mechanism

Anny Slama-Schwok, Joseph Rabani^*

^*Corresponding author for this work

Institute of Chemistry

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Abstract

Pulse radiolysis of aqueous solutions containing [Ir(bpy)₂(C³,H(bpy)]^3+1,2 or its basic form (Ir(III)³⁺ and Ir(III)²⁺, respectively) in the presence of 2-propanol produces the reduced Ir(II)²⁺ species (the reduction is at the bpy site). The decay of Ir(II)²⁺ is strongly enhanced by the presence of small concentrations of poly(styrenesulfonate) (PSS). Both intrapolymer and interpolymer bimolecular reactions of Ir(II)²⁺ are observed, followed by the formation of a hydride. Exchange of Ir(II)²⁺ between different polymer molecules is enhanced by Ir(II)²⁺ in the bulk. The effects of [PSS], pulse intensity, and [Ir(III)²⁺] on the decay kinetics are reported and discussed. The overall effect of PSS on Ir(II)²⁺ is the catalyzed formation of hydrogen.

Original language	English
Pages (from-to)	2989-2993
Number of pages	5
Journal	Journal of Physical Chemistry
Volume	91
Issue number	11
DOIs	https://doi.org/10.1021/j100295a069
State	Published - 1987

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title = "Decay of an Ir(II) complex in aqueous solutions studied by pulse radiolysis. Effect of poly(styrenesulfonate) on the mechanism",

abstract = "Pulse radiolysis of aqueous solutions containing [Ir(bpy)2(C3,H(bpy)]3+1,2 or its basic form (Ir(III)3+ and Ir(III)2+, respectively) in the presence of 2-propanol produces the reduced Ir(II)2+ species (the reduction is at the bpy site). The decay of Ir(II)2+ is strongly enhanced by the presence of small concentrations of poly(styrenesulfonate) (PSS). Both intrapolymer and interpolymer bimolecular reactions of Ir(II)2+ are observed, followed by the formation of a hydride. Exchange of Ir(II)2+ between different polymer molecules is enhanced by Ir(II)2+ in the bulk. The effects of [PSS], pulse intensity, and [Ir(III)2+] on the decay kinetics are reported and discussed. The overall effect of PSS on Ir(II)2+ is the catalyzed formation of hydrogen.",

author = "Anny Slama-Schwok and Joseph Rabani",

year = "1987",

doi = "10.1021/j100295a069",

language = "אנגלית",

volume = "91",

pages = "2989--2993",

journal = "Journal of Physical Chemistry",

issn = "0022-3654",

publisher = "American Chemical Society",

number = "11",

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T1 - Decay of an Ir(II) complex in aqueous solutions studied by pulse radiolysis. Effect of poly(styrenesulfonate) on the mechanism

AU - Slama-Schwok, Anny

AU - Rabani, Joseph

PY - 1987

Y1 - 1987

N2 - Pulse radiolysis of aqueous solutions containing [Ir(bpy)2(C3,H(bpy)]3+1,2 or its basic form (Ir(III)3+ and Ir(III)2+, respectively) in the presence of 2-propanol produces the reduced Ir(II)2+ species (the reduction is at the bpy site). The decay of Ir(II)2+ is strongly enhanced by the presence of small concentrations of poly(styrenesulfonate) (PSS). Both intrapolymer and interpolymer bimolecular reactions of Ir(II)2+ are observed, followed by the formation of a hydride. Exchange of Ir(II)2+ between different polymer molecules is enhanced by Ir(II)2+ in the bulk. The effects of [PSS], pulse intensity, and [Ir(III)2+] on the decay kinetics are reported and discussed. The overall effect of PSS on Ir(II)2+ is the catalyzed formation of hydrogen.

AB - Pulse radiolysis of aqueous solutions containing [Ir(bpy)2(C3,H(bpy)]3+1,2 or its basic form (Ir(III)3+ and Ir(III)2+, respectively) in the presence of 2-propanol produces the reduced Ir(II)2+ species (the reduction is at the bpy site). The decay of Ir(II)2+ is strongly enhanced by the presence of small concentrations of poly(styrenesulfonate) (PSS). Both intrapolymer and interpolymer bimolecular reactions of Ir(II)2+ are observed, followed by the formation of a hydride. Exchange of Ir(II)2+ between different polymer molecules is enhanced by Ir(II)2+ in the bulk. The effects of [PSS], pulse intensity, and [Ir(III)2+] on the decay kinetics are reported and discussed. The overall effect of PSS on Ir(II)2+ is the catalyzed formation of hydrogen.

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SN - 0022-3654

VL - 91

SP - 2989

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JO - Journal of Physical Chemistry

JF - Journal of Physical Chemistry

IS - 11

ER -

Decay of an Ir(II) complex in aqueous solutions studied by pulse radiolysis. Effect of poly(styrenesulfonate) on the mechanism

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