Metal-free and visible-light-mediated method enables the synthesis of olefins from ketones DOI Creative Commons
Yu Zhang, Xinyu Han, Rong-Kai Wu

et al.

Green Synthesis and Catalysis, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 1, 2024

Direct synthesis of olefins continues to attract stellar attention due the high importance olefins. In this context, wide availability ketones, directly from ketones provides a straightforward route. Considering this, via formation donor/donor type carbenes has been developed which leads efficient versatile by using metal-free strategy. This approach features mild reaction conditions and exhibits broad substrate scope when biomass-derived solvent as green media is used. The practical utility demonstrated late-stage modifications even scaling up 20 grams scale. At end, mechanistic investigations density functional theory studies clearly proved carbenes, examined necessity all reagents effect light in system.

Language: Английский

Photocatalytic Regeneration of a Nicotinamide Adenine Nucleotide Mimic with Water-Soluble Iridium(III) Complexes DOI Creative Commons

Mirjam R. Schreier,

Björn Pfund,

Debora M. Steffen

et al.

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(20), P. 7636 - 7643

Published: Feb. 2, 2023

Nicotinamide adenine nucleotide (NADH) is involved in many biologically relevant redox reactions, and the photochemical regeneration of its oxidized form (NAD+) under physiological conditions interest for combined photo- biocatalysis. Here, we demonstrate that tri-anionic, water-soluble variants typically very lipophilic iridium(III) complexes can photo-catalyze reduction an NAD+ mimic a comparatively efficient manner. In combination with well-known rhodium co-catalyst to facilitate regioselective these photo-reductants outcompete commonly used [Ru(bpy)3]2+ (bpy = 2,2′-bipyridine) photosensitizer water by up 1 order magnitude turnover frequency. This improved reactivity attributable strong excited-state electron donor properties good chemical robustness tri-anionic sensitizers, their favorable Coulombic interaction di-cationic co-catalyst. Our findings seem greater context photobiocatalysis, which access strong, efficient, robust photoreductants solubility be essential.

Language: Английский

Citations

10
A new family of luminescent iridium complexes: synthesis, optical, and cytotoxic studies DOI Creative Commons
Gonzalo Millán, Mattia Nieddu, Icíar P. López

et al.

Dalton Transactions, Journal Year: 2023, Volume and Issue: 52(19), P. 6360 - 6374

Published: Jan. 1, 2023

A new family of luminescent cyclometalated Ir( iii ) complexes [Ir(C^N) 2 (N^N)] + was prepared. The most cytotoxic complex 2a-Cl locates in lysosomes but acts destroying mitochondria, while 3a-PF6 revelled its potential as photosensitiser PDT.

Language: Английский

Citations

10
Visible‐to‐UV Photon Upconversion: Recent Progress in New Materials and Applications DOI

Masanori Uji,

Till J. B. Zähringer, Christoph Kerzig

et al.

Angewandte Chemie, Journal Year: 2023, Volume and Issue: 135(25)

Published: March 8, 2023

Abstract Ultraviolet (UV, λ <400 nm) light is essential for various photochemical reactions, but its intensity in the solar spectrum very low, and sources that artificially generate high‐energy UV are inefficient environmentally unfriendly. A solution to this problem photon upconversion (UC) from visible (vis, >400 light. Among several mechanisms, UC based on triplet‐triplet annihilation (TTA‐UC) particular has made remarkable progress recent years. The development of new chromophores enabled highly efficient conversion low‐intensity into In review, we summarize visible‐to‐UV TTA‐UC, their production films application processes such as catalysis, bond activation polymerization. Finally, challenges opportunities future material applications will be discussed.

Language: Английский

Citations

9
Photochemically Induced Cyclometalations at Simple Platinum(II) Precursors DOI Creative Commons
Dionisio Poveda, Ángela Vivancos,

Delia Bautista

et al.

Inorganic Chemistry, Journal Year: 2023, Volume and Issue: 62(16), P. 6207 - 6213

Published: April 12, 2023

Photochemical cycloplatinations of 2-arylpyridines and related C∧N ligands, as well terdentate heteroaromatic N∧N∧C, N∧C∧N, N∧C∧C compounds, are demonstrated using (Bu4N)2[Pt2Cl6] or [PtCl2(NCPh)2] precursors at room temperature. Mono- bis-cyclometalated Pt(II) complexes with ligands obtained depending on excitation wavelength precursor. Monitoring experiments show that photoexcitation enables both the N-coordination subsequent C-H metalation. synthetic protocols have been developed, which advantageous respect to established thermal procedures allowed synthesis first ligands.

Language: Английский

Citations

7
Metal-free and visible-light-mediated method enables the synthesis of olefins from ketones DOI Creative Commons
Yu Zhang, Xinyu Han, Rong-Kai Wu

et al.

Green Synthesis and Catalysis, Journal Year: 2024, Volume and Issue: unknown

Published: Feb. 1, 2024

Direct synthesis of olefins continues to attract stellar attention due the high importance olefins. In this context, wide availability ketones, directly from ketones provides a straightforward route. Considering this, via formation donor/donor type carbenes has been developed which leads efficient versatile by using metal-free strategy. This approach features mild reaction conditions and exhibits broad substrate scope when biomass-derived solvent as green media is used. The practical utility demonstrated late-stage modifications even scaling up 20 grams scale. At end, mechanistic investigations density functional theory studies clearly proved carbenes, examined necessity all reagents effect light in system.

Language: Английский

Citations

2