Tetra-Cationic Distibane Stabilized by Bis(α-iminopyridine) and Its Reactivity

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 16, 2025

The work establishes the salt of a tetra-cationic distibane, [L2Sb2][CF3SO3]4 = [1]2[OTf]4 (CF3SO3 OTf), stabilized by bis(α-iminopyridine) ligand L, defying Coulombic repulsion. synthetic approach involved dehydrocoupling reaction when mixture L and Sb(OTf)3 in 1:1 ratio was treated with Et3SiH/LiBEt3H as hydride source. Compound also achieved from [LSbCl][OTf]2 precursor using Et3SiH. Dissolution polar solvents unveiled formation persistent L-stabilized dicationic Sb(II) radical monomer [1][OTf]2, while addition Me3SiOTf regenerated dimer [1]2[OTf]4. homolytic cleavage Sb–Sb bond [1]24+ has manifested exchange reactions between Ph2Ch2 (Ch S, Se), giving [LSb(SPh)][OTf]2 [2][OTf]2 [LSb(SePh)][OTf]2 [3][OTf]2, respectively, acetonitrile. Reaction p-benzoquinone gave [L2Sb2(C6H4O2)][OTf]4 [4][OTf]4. An interesting oxygen atom insertion occurred 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) to give [L2Sb2O][ OTf]4 [5][OTf]4. oxo-bridged compound [5][OTf]4 obtained exposure open air. strong Mn–Mn [Mn2(CO)10] could be cleaved reacting presence pyridine form [LSbMn(CO)5][ OTf]2 [6][OTf]2. On other hand, [Co2(CO)8] oxidative product [L2Sb2Co(CO)3][OTf]3 [7][OTf]3. compounds were characterized both solid solution states. Computational studies comprehensive understanding experimental findings.

Language: Английский

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Manganese Complexes with Consecutive Mn(IV) → Mn(III) Excitation for Versatile Photoredox Catalysis

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(35), P. 24515 - 24525

Published: July 30, 2024

Manganese complexes stand out as promising candidates for photocatalyst design, attributed to their eco- and biocompatibility, versatile valence states, capability facilitating multiple electronic excitations. However, several intrinsic constraints, such inadequate visible light response short excited-state lifetimes, hinder effective photoinduced electron transfer impede photoredox activation of substrates. To overcome this obstacle, we have developed a class manganese featuring boron-incorporated

Language: Английский

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Microenvironment‐Responsive Targeted Nanomedicine for a Collaborative Integration of Tumor Theranostics and Bone Defect Repair

Advanced Healthcare Materials, Journal Year: 2024, Volume and Issue: 13(27)

Published: June 1, 2024

Abstract Despite advancements in breast cancer treatment, bone metastases remain a significant concern for advanced patients. Current theranostics strategies face challenges integrating tumor and formation. Herein, this work develops an activatable targeted nanomedicine AuMnCO@BSA‐N 3 (AMCBN) to enable novel collaborative integration of second near‐infrared (NIR‐II) fluorescence imaging guided precise osteogenic microenvironment remolding. This strategy employs chemical coordination between noble metal complex carbonyl (MnCO), with surface modification azide groups enhance affinity through passive active targeting. The initiated respondent behavior AMCBN by accelerate the degradation coordinated MnCO, resulting rapid release multifunctional agents efficient chemodynamic therapy (CDT)/gas synergistic therapy. Meanwhile, exceptional bone‐binding properties controlled Mn 2+ ions carbon monoxide (CO) microenvironment, thereby facilitating expression osteogenesis‐related proteins establishing synchronous process tumor‐bone repair.

Language: Английский

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Visible-light-induced dual catalysis for divergent reduction of nitro compounds with CO2 radical anion

Chinese Chemical Letters, Journal Year: 2025, Volume and Issue: unknown, P. 110899 - 110899

Published: Jan. 1, 2025

Language: Английский

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AgNO3 catalysed oxidation of aromatic amines in the presence of hydrogen peroxide

Tetrahedron Letters, Journal Year: 2025, Volume and Issue: unknown, P. 155511 - 155511

Published: March 1, 2025

Language: Английский

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Multisubstituted Indoles by a Dual Gold/Silver-Catalyzed Aminoalkynylation of 2-Alkynylanilines

Organic Letters, Journal Year: 2025, Volume and Issue: unknown

Published: March 30, 2025

A straightforward and efficient method for the synthesis of multisubstituted indoles has been developed through a dual gold/silver-catalyzed aminoalkynylation 2-alkynylanilines using hypervalent iodine(III) reagents under open-air conditions. This approach features in situ generation alkynyl Au(III) species, which facilitates with excellent functional group tolerance high yields. Mechanistic studies reveal that gold(III) intermediate plays crucial role reaction pathway. Moreover, protocol is scalable to gram quantities offers potential further transformation into diverse functionalized compounds.

Language: Английский

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Poly(ionic liquid)-Modulated Synthesis of Mesoporous Au–Pd Nanospheres for Catalytic Oxidation of p-Hydroxybenzyl Alcohol

ACS Applied Nano Materials, Journal Year: 2025, Volume and Issue: unknown

Published: May 6, 2025

Language: Английский

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Trinuclear gold-catalyzed site-selective alkylation of peptides

Science China Chemistry, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 14, 2024

Language: Английский

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A robust, versatile, and reusable heterogeneous hydrogenation catalyst based on a simple Ni(II) diimine complex and its application to the syntheses of amines

Tetrahedron Green Chem, Journal Year: 2024, Volume and Issue: 3, P. 100036 - 100036

Published: Feb. 12, 2024

Language: Английский

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14‐Membered Macrocyclic β‐Diiminato Gold(II) – A New Member for the Gold(II) Complex Family?

Chemistry - A European Journal, Journal Year: 2024, Volume and Issue: 30(34)

Published: April 16, 2024

The chemistry of molecular gold compounds is dominated by the oxidation states +I and +III. For intermediate state +II with 5d

Language: Английский

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