Rhenium(I) trinuclear rings as highly efficient redox photosensitizers for photocatalytic CO2 reduction: Difference between revisions

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DOI 10.1039/c6sc01913g
Authors Jana Rohacova, Osamu Ishitani,
Submitted 05.07.2016
Published online 2016
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====Photosensitizer ====
====Photosensitizer ====
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   -INDIGO-04202312202D
   -INDIGO-02192415292D


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M  V30 END ATOM
M  V30 END ATOM
M  V30 BEGIN BOND
M  V30 BEGIN BOND

Revision as of 15:29, 19 February 2024


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Abstract

Summary

A photochemical reduction of CO2 to CO or formic acid was shown using the bipyridine-based rhenium, ruthenium and manganese catalysts [Re(bpy)(CO)3(MeCN)][PF6], Ru(dtBubpy)(CO)2Cl2 or [Mn(dtBubpy)(CO)3(MeCN)][PF6] in combination with cyclic rhenium-based trinuclear redox photosensitizers. Turnover numbers (TONs) of up to 290 for formic acid were reached in DMA with the ruthenium complex Ru(dtBubpy)(CO)2Cl2 and photosensitizer Molecule with key KSOIVZAANOLODS-UHFFFAOYSA-T does not exist.. For CO production, TONs of up to 98 were obtained in DMF with the rhenium complex [Re(bpy)(CO)3(MeCN)][PF6] and photosensitizer Molecule with key LOLRMPNEYKEGPF-UHFFFAOYSA-T does not exist.. The experiments were conducted under visible-light irradiation (λ = 436 nm) using TEOA as sacrificial electron donor (see section SEDs below).

Advances and special progress

Re(I)-based trinuclear photosensitizers were developed and allowed for high product selectivities for CO or formic acid in CO2 reduction attempts with different bipyridine-based catalysts.

Additional remarks

Content of the published article in detail

The article contains results for the reduction of CO2 to CO or formic acid under visible-light catalysis using bipyridine-based complexes and rhenium-based trinuclear rings as photosensitizers. The catalytic system performs best in DMA for formic acid production (referring to the TON of formic acid production) and in DMF for CO production.

Catalyst

[Re(bpy)(CO)3(MeCN)][PF6] Ru(dtBubpy)(CO)2Cl2 [Mn(dtBubpy)(CO)3(MeCN)][PF6]

Photosensitizer

Investigation

Investigation-Name: Table 1
catcat conc [µM]PSPS conc [mM]e-De-D conc [M]solvent A..λexc [nm].TON COTON H2TON HCOOH...
1.

Ru(dtBubpy)(CO)2Cl2

0.05

Molecule:100877

0.05


DMF

4362072290
2.

Ru(dtBubpy)(CO)2Cl2

0.05

Molecule:100877

0.05

BI(OH)H

0.03

DMF

4361649280
3.

[Mn(dtBubpy)(CO)3(MeCN)][PF6]

0.05

Molecule:100877

0.05


DMF

4363285
4.

[Mn(dtBubpy)(CO)3(MeCN)][PF6]

0.05

Molecule:100877

0.05

BI(OH)H

0.03

DMF

4368060
Investigation-Name: Table 2

Sacrificial Electron Donor

In this study, the experiments were done with the sacrificial electron donor TEOA (100507).

Additives

In this study, no additives were tested.

Investigations

  • Table 1 (Molecular process, Photocatalytic CO2 conversion experiments)
  • Table 2 (Molecular process, Photocatalytic CO2 conversion experiments)