Editing Photocatalytic CO2 reduction with aminoanthraquinone organic dyes

{{DOI|doi=10.1038/s41467-023-36784-7}}
[[Category:Photocatalytic CO2 conversion to CO]][[Category:Publication]]
{{BaseTemplate}}
===Abstract===
====Summary====
The photochemical reduction of CO<sub>2</sub> to CO was shown using the iron complex {{#moleculelink:|link=JQYRTQVHCKLBTL-YQGGSDPOSA-M|image=false|width=300|height=200}} in combination with the aminoanthraquinone photosensitizers {{#moleculelink: |link=KHUFHLFHOQVFGB-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=AQXYVFBSOOBBQV-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=MSSQDESMUMSQEN-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=QZZSAWGVHXXMID-UHFFFAOYSA-N|image=false|width=300|height=200}}, {{#moleculelink: |link=LRMDXTVKVHKWEK-UHFFFAOYSA-N|image=false|width=300|height=200}} and {{#moleculelink: |link=FBMQNRKSAWNXBT-UHFFFAOYSA-N|image=false|width=300|height=200}}. Turnover numbers (TONs) of up to 21616 and a selectivity of >99.9% for CO were reached in DMF after 48 h of irradiation. The experiments were conducted under visible-light irradiation (λ > 400 nm) with BIH (see section SEDs below) as sacrificial electron donor.
====Advances and special progress====
The authors present an efficient photocatalytic system with naturally abundant photosensitizers and without rare metals in which both the photosensitizer and catalyst show a high activity.

====Additional remarks====
For the most efficient system investigated in this study, a TON of 21616 per mole of catalyst and a TON of 6012 per mole of photosensitizer was obtained.

===Content of the published article in detail===
The article contains results of a study for the reduction of CO<sub>2</sub> to CO using an iron complex and different aminoanthraquinone-based photosensitizers. The catalytic system performs best (referring to the TON of CO production) in DMF with photosensitizer {{#moleculelink: |link=MSSQDESMUMSQEN-UHFFFAOYSA-N|image=false|width=300|height=200}}.
====Catalyst====
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  -INDIGO-05102411192D

  0  0  0  0  0  0  0  0  0  0  0 V3000
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M  V30 BEGIN ATOM
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M  V30 16 C 10.1064 -4.26599 0.0 0
M  V30 17 C 9.95772 -7.65583 0.0 0
M  V30 18 C 10.6294 -6.97212 0.0 0
M  V30 19 C 10.1574 -6.01331 0.0 0
M  V30 20 N 9.16061 -6.23601 0.0 0
M  V30 21 C 8.99071 -7.20052 0.0 0
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M  V30 23 C 10.6136 -5.1532 0.0 0
M  V30 24 C 8.13038 -1.67807 0.0 0
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M  V30 52 O 9.87309 -8.6716 0.0 0
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M  V30 57 O 11.6196 -6.87514 0.0 0
M  V30 58 Cl 8.025 -6.125 0.0 0
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 1 2
M  V30 2 1 2 3
M  V30 3 1 3 4
M  V30 4 2 4 5
M  V30 5 1 1 5
M  V30 6 1 5 11
M  V30 7 2 3 22
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M  V30 26 1 19 23
M  V30 27 2 26 24
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M  V30 35 2 10 30
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M  V30 37 1 28 32
M  V30 38 1 23 33
M  V30 39 1 9 34
M  V30 40 1 34 20
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M  V30 43 2 36 33
M  V30 44 2 37 35
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M  V30 49 1 11 40
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M  V30 END BOND
M  V30 END CTAB
M  END
</chemform>

==== Photosensitizer ====
<chemform smiles="C1C=CC2C(=O)C3C([*])=CC([*])=C(N)C=3C(=O)C=2C=1" inchi="" inchikey="" height="200px" width="300px" float="none" r1="H,H,Br,SO3H,NH2,H" r2="H,OH,OH,Br,H,NH2">
  -INDIGO-05102411112D

  0  0  0  0  0  0  0  0  0  0  0 V3000
M  V30 BEGIN CTAB
M  V30 COUNTS 19 21 0 0 0
M  V30 BEGIN ATOM
M  V30 1 C 4.13485 -3.75007 0.0 0
M  V30 2 C 5.86515 -3.74959 0.0 0
M  V30 3 C 5.00164 -3.24997 0.0 0
M  V30 4 C 5.86515 -4.75053 0.0 0
M  V30 5 C 4.13485 -4.75502 0.0 0
M  V30 6 C 5.00382 -5.25003 0.0 0
M  V30 7 C 6.73201 -5.25103 0.0 0
M  V30 8 C 7.59886 -4.75058 0.0 0
M  V30 9 C 7.59886 -3.74963 0.0 0
M  V30 10 C 6.73201 -3.24914 0.0 0
M  V30 11 O 6.73202 -2.24914 0.0 0
M  V30 12 O 6.73201 -6.25103 0.0 0
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M  V30 14 C 9.33054 -3.75159 0.0 0
M  V30 15 C 8.46951 -5.25291 0.0 0
M  V30 16 C 9.33274 -4.7475 0.0 0
M  V30 17 N 8.46353 -2.25126 0.0 0
M  V30 18 R# 10.1959 -3.25051 0.0 0 RGROUPS=(1 1)
M  V30 19 R# 8.4727 -6.25291 0.0 0 RGROUPS=(1 2)
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 1 2 3 1
M  V30 2 2 4 2
M  V30 3 1 1 5
M  V30 4 1 2 3
M  V30 5 2 5 6
M  V30 6 1 6 4
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M  V30 18 1 16 14
M  V30 19 1 13 17
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M  V30 21 1 15 19
M  V30 END BOND
M  V30 END CTAB
M  END
</chemform>

==== Investigation ====
{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Photocatalytic reduction of CO2 with different photosensitizers|importFile=}}

{{#experimentlist:|form=Photocatalytic_CO2_conversion_experiments|name=Photocatalytic CO2 reduction with varying concentrations of cat and PS|importFile=}}

==== Sacrificial electron donor ====
In this study, the experiments were done with the sacrificial electron donor BIH ([[Molecule:100508|100508]]).

==== Additives ====
In this study, the addition of Hg(0) was tested.