Toward the photoreduction of CO2 with Ni(2,2′-bipyridine)N 2+ complexes

Yukie Mori, David J. Szalda, Bruce S. Brunschwig, Harold A. Schwarz, Etsuko Fujita

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Abstract

When an acetonitrilesolution containingNi(bpy)3 2+ (bpy -2,2′-bipyridine) Methylamine, and CO2 is irradiated at 313 nm, CO is produced with a quantum yield of -0.1% (defined as CO produced/photons absorbed). Flash photolysis, electrochemistry, and pulse radiolysis experiments provide evidence for the formation ofNi'(bpy)2 +, as an intermediate, in the photochemical Nl(bpy)32+-triethylamine-CO2 system. Although Ni°(bpy)2does react with CO2, Nil(bpy)2 + seems unreactive toward CO2 addition. The X-ray structure of (Ni3(bpy)6)(ClO4), which crystallizes as blue-violet needles, reveals the existence of a dimer in the solid. UV-vis spectra also indicate that reduced Ni(bpy)32+ solutions contain Nil(bpy)2 +, [Ni(bpy)2]2, and [Ni(bpy)2]2 complexes in equilibrium.

Original languageEnglish
Pages (from-to)279-292
Number of pages14
JournalAdvances in Chemistry Series
Volume254
Publication statusPublished - 1998

ASJC Scopus subject areas

  • Chemistry(all)

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    Mori, Y., Szalda, D. J., Brunschwig, B. S., Schwarz, H. A., & Fujita, E. (1998). Toward the photoreduction of CO2 with Ni(2,2′-bipyridine)N 2+ complexes. Advances in Chemistry Series, 254, 279-292.