Divalent Intermediates in Lanthanide-Based Photocatalysts: Spectroscopic Characterization and Reactivity DOI Creative Commons
Monika Tomar, Anders Thapper, Andreas Orthaber

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 594 - 605

Published: Dec. 23, 2024

The reduction of stable trivalent lanthanide species (Ln(III)) by the excited states organic chromophores is basis photocatalytic divalent lanthanide-mediated reactions. While indirect evidence photochemical formation reactive Ln(II) abundant, direct spectroscopic their presence scarce. Here, nine with absorptions covering near UV and visible ranges were systematically investigated in Ln(III) ions to evaluate ability reduce Eu(III) upon excitation light catalytically active Eu(II) species. Irradiated mixtures characterized using UV–vis absorption emission EPR spectroscopy. Several chromophore-Eu(III) combinations competent photocatalysts N,N-diisopropylethylamine or Zn terminal reductants. These results demonstrate that a variety visible-absorbing can efficiently generate from catalyze Ln(II)-mediated

Language: Английский

Successors of SmI2: Next Generation Metal, Photo and Electro‐Catalysis for Reductive Organic Synthesis DOI
Samarpita Senapati,

Subhendu Jena,

Manwar Box

et al.

European Journal of Organic Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Abstract Electron transfer plays a pivotal role in generating radical intermediates which are pillars of constructing complex molecular structure. Since the introduction by Kagan, SmI 2 played key single electron mediated reductive transformations. Despite significant applications high profile synthesis natural products, usage was discoursed due to weight reagent, less solubility and most importantly stoichiometric nature reactions. Recent years have witnessed renaissance photo‐and electro‐catalytic reactions more sustainable nature. A handful these showed potential replace as greener alternative. This prospective article aims demonstrate reducing systems use .

Language: Английский

Citations

0
Trendbericht Photochemie 2025 DOI
Thorsten Bach, Alexander Breder, Tanja Gulder

et al.

Nachrichten aus der Chemie, Journal Year: 2025, Volume and Issue: 73(4), P. 56 - 67

Published: March 31, 2025

Abstract Dieser Trendbericht erläutert Erkenntnisse der letzten beiden Jahre aus Sicht von Wissenschaftlerinnen und Wissenschaftlern des interdisziplinären, durch die DFG geförderten Konsortiums Transregio 325. Die Autorinnen Autoren forschen vor allem zu chemischer Photokatalyse beleuchten besonders Themen mit molekülchemischer Komponente.

Citations

0
Photocatalyst for Visible-Light-Driven Sm(II)-Mediated Reductions DOI Creative Commons
Monika Tomar,

Caroline Bosch,

Jules Everaert

et al.

Organic Letters, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 11, 2024

Commercially available coumarin 343 in combination with reducible Sm(III) ions catalyzed divalent lanthanide-mediated C═O, C-halogen, P-Cl, and N═N reductions at ambient temperature aqueous solvent mixtures. The catalyst absorbs visible light efficiently. active species is formed by photoinduced electron transfer from to the stable trivalent precursor, could be regenerated strictly 1 equiv of ascorbic acid.

Language: Английский

Citations

1
Divalent Intermediates in Lanthanide-Based Photocatalysts: Spectroscopic Characterization and Reactivity DOI Creative Commons
Monika Tomar, Anders Thapper, Andreas Orthaber

et al.

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 64(1), P. 594 - 605

Published: Dec. 23, 2024

The reduction of stable trivalent lanthanide species (Ln(III)) by the excited states organic chromophores is basis photocatalytic divalent lanthanide-mediated reactions. While indirect evidence photochemical formation reactive Ln(II) abundant, direct spectroscopic their presence scarce. Here, nine with absorptions covering near UV and visible ranges were systematically investigated in Ln(III) ions to evaluate ability reduce Eu(III) upon excitation light catalytically active Eu(II) species. Irradiated mixtures characterized using UV–vis absorption emission EPR spectroscopy. Several chromophore-Eu(III) combinations competent photocatalysts N,N-diisopropylethylamine or Zn terminal reductants. These results demonstrate that a variety visible-absorbing can efficiently generate from catalyze Ln(II)-mediated

Language: Английский

Citations

1