Editing Photocatalytic CO2 Reduction Using a Robust Multifunctional Iridium Complex toward the Selective Formation of Formic Acid

{{DOI|doi=10.1021/jacs.0c03097}}
[[Category:Photocatalytic CO2 conversion to HCOOH]]
{{BaseTemplate}}
===Abstract===
====Summary====
A photochemical reduction of CO<sub>2</sub> to formic acid and CO was shown using the iridium complex {{#moleculelink:|link=BEUJVGCRFICSDD-UHFFFAOYSA-M|image=false|width=300|height=200}} as a catalyst without any additional photosensitizer. Turnover numbers (TONs) of 2080 and a selectivity of 87% for formic acid were reached in dimethylacetamide/water. The experiments were conducted under visible-light irradiation (λ > 400 nm) using BIH as sacrificial electron donor (see section SEDs below).
==== Advances and special progress ====
The authors have developed a multifunctional catalyst that allows for selective generation of formic acid without the need for an external photosensitizer. 

====Additional remarks ====
The developed catalyst reduces CO2 to CO via inner-sphere catalysis and to formic acid via outer-sphere catalysis.

===Content of the published article in detail===
The article contains results for the reduction of CO<sub>2</sub> to CO and formic acid under visible-light catalysis using an iridium complex. The catalytic system performs best (referring to the TON of formic acid production) in dimethylacetamide/water.
====Catalyst====
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  -INDIGO-05172314302D

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M  V30 2 C 5.44044 -3.84035 0.0 0
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M  V30 4 N 5.18138 -4.80719 0.0 0
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M  V30 7 C 6.83474 -3.84129 0.0 0
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M  V30 9 C 7.54256 -3.13388 0.0 0
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M  V30 12 C 8.06232 -5.06523 0.0 0
M  V30 13 C 3.9613 -6.03267 0.0 0
M  V30 14 P 4.66841 -6.73977 0.0 0
M  V30 15 C 8.32114 -6.03116 0.0 0
M  V30 16 P 7.61404 -6.73827 0.0 0
M  V30 17 C 8.61404 -6.73827 0.0 0
M  V30 18 C 9.11405 -7.6043 0.0 0
M  V30 19 C 10.114 -7.6043 0.0 0
M  V30 20 C 10.614 -6.73827 0.0 0
M  V30 21 C 10.114 -5.87223 0.0 0
M  V30 22 C 9.11401 -5.87223 0.0 0
M  V30 23 C 7.87286 -7.70419 0.0 0
M  V30 24 C 7.16575 -8.41132 0.0 0
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M  V30 26 C 8.39049 -9.63603 0.0 0
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M  V30 41 C 4.28631 -1.45274 0.0 0
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M  V30 43 C 0.940254 -0.566672 0.0 0
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M  V30 48 C 3.16839 -5.87374 0.0 0
M  V30 49 C 2.1684 -5.87374 0.0 0
M  V30 50 C 1.66842 -6.73977 0.0 0
M  V30 51 C 2.16844 -7.60581 0.0 0
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M  V30 53 C 4.40959 -7.7057 0.0 0
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M  V30 57 C 4.85789 -9.3787 0.0 0
M  V30 58 C 5.11671 -8.41278 0.0 0
M  V30 59 Ir 6.15 -5.875 0.0 0 CHG=3
M  V30 60 Cl 6.15 -6.875 0.0 0 CHG=-1
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M  V30 26 1 23 28
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M  V30 31 1 27 28
M  V30 32 1 1 29
M  V30 33 2 31 29
M  V30 34 2 32 30
M  V30 35 1 29 33
M  V30 36 1 30 31
M  V30 37 2 33 34
M  V30 38 1 34 32
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M  V30 40 2 37 35
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M  V30 42 1 35 39
M  V30 43 1 36 37
M  V30 44 2 39 40
M  V30 45 1 40 38
M  V30 46 1 33 41
M  V30 47 1 31 42
M  V30 48 1 32 43
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M  V30 96 1 81 85
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M  V30 99 1 86 84
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform>

====Investigation ====
{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Table 1}}
====Sacrificial Electron Donor====
In this study, the experiments were done with the sacrificial electron donor BIH ({{#moleculelink:|link=VDFIVJSRRJXMAU-UHFFFAOYSA-N|image=false|width=300|height=200}}).
====Additives====
In this study, additional control experiments were conducted with Hg.
__FORCETOC__