Photochemical Formic Acid Dehydrogenation by Tethered and Untethered Iridium Complexes

Presentation Type

Poster

Presentation Type

Submission

Keywords

Chemistry, inorganic chemistry, catalysis

Department

Chemistry

Major

Chemistry

Abstract

Pentamethylcyclopentadienyl iridium bipyridine complexes have been demonstrated to act as efficient photocatalysts in the dehydrogenation of formic acid for the production of H2 and CO2 . We have explored the influence of halide ligand on the homogenous photochemical formic acid dehydrogenation catalyzed by expanding the catalyst scope to include [Cp*Ir(bpy)Br][Br], [Cp*Ir(bpy)I][I], and [Cp*Ir(bpy-CO2H)Cl][Cl] as well as the original catalyst, [Cp*Ir(bpy)Cl][Cl]. A heterogenous catalysis system was also explored by tethering [Cp*Ir(bpy-CO2H)Cl][Cl] to a silica-based support resin. The tethered system was characterized using attenuated total reflectance (ATR) IR and UV-Vis spectroscopy. This system has advantages over homogenous catalysis in the ease of separation from the reaction mixture and potential for catalyst recyclability.

Faculty Mentor

David Green and Kelsey Brereton

Funding Source or Research Program

Summer Undergraduate Research Program, Undergraduate Research Fellowship

Location

Waves Cafeteria

Start Date

24-3-2023 2:00 PM

End Date

24-2-2023 4:00 PM

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Mar 24th, 2:00 PM Feb 24th, 4:00 PM

Photochemical Formic Acid Dehydrogenation by Tethered and Untethered Iridium Complexes

Waves Cafeteria

Pentamethylcyclopentadienyl iridium bipyridine complexes have been demonstrated to act as efficient photocatalysts in the dehydrogenation of formic acid for the production of H2 and CO2 . We have explored the influence of halide ligand on the homogenous photochemical formic acid dehydrogenation catalyzed by expanding the catalyst scope to include [Cp*Ir(bpy)Br][Br], [Cp*Ir(bpy)I][I], and [Cp*Ir(bpy-CO2H)Cl][Cl] as well as the original catalyst, [Cp*Ir(bpy)Cl][Cl]. A heterogenous catalysis system was also explored by tethering [Cp*Ir(bpy-CO2H)Cl][Cl] to a silica-based support resin. The tethered system was characterized using attenuated total reflectance (ATR) IR and UV-Vis spectroscopy. This system has advantages over homogenous catalysis in the ease of separation from the reaction mixture and potential for catalyst recyclability.