An Ir3L2 complex with anion binding pockets: photocatalytic E–Z isomerization via molecular recognition

Sunohara, Haruka; Koyamada, Kenta; Takezawa, Hiroki; Fujita, Makoto

doi:10.1039/d1cc03620c

Cited by 17 publications

(4 citation statements)

References 32 publications

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“…Enantiopure C46 cage (a) self-assembly, (b) substrate selectivity of the photocatalytic E – Z isomerization between 111 and 113 by Λ-C46 . (c) Crystal structure of Λ-C46 atoms: C = gray, F = lime green, N = dark blue, P = orange, Ir = navy blue …”

Section: Photoredox Catalysis For the Synthesis Of Complex Moleculesmentioning

confidence: 99%

Supramolecular Coordination Cages for Artificial Photosynthesis and Synthetic Photocatalysis

et al. 2023

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Because sunlight is the most abundant energy source on earth, it has huge potential for practical applications ranging from sustainable energy supply to light driven chemistry. From a chemical perspective, excited states generated by light make thermodynamically uphill reactions possible, which forms the basis for energy storage into fuels. In addition, with light, open-shell species can be generated which open up new reaction pathways in organic synthesis. Crucial are photosensitizers, which absorb light and transfer energy to substrates by various mechanisms, processes that highly depend on the distance between the molecules involved. Supramolecular coordination cages are well studied and synthetically accessible reaction vessels with single cavities for guest binding, ensuring close proximity of different components. Due to high modularity of their size, shape, and the nature of metal centers and ligands, cages are ideal platforms to exploit preorganization in photocatalysis. Herein we focus on the application of supramolecular cages for photocatalysis in artificial photosynthesis and in organic photo(redox) catalysis. Finally, a brief overview of immobilization strategies for supramolecular cages provides tools for implementing cages into devices. This review provides inspiration for future design of photocatalytic supramolecular host−guest systems and their application in producing solar fuels and complex organic molecules.

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Section: Photoredox Catalysis For the Synthesis Of Complex Moleculesmentioning

confidence: 99%

Supramolecular Coordination Cages for Artificial Photosynthesis and Synthetic Photocatalysis

et al. 2023

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“…The Fujita group has developed a cage-based photocatalyst ( Δ/Λ-3 ) using Ir( iii ) as a metal node. 61 The iridium( iii ) complex usually serves as a versatile precursor for this photoresponsive system, yet it is seldom employed as the metal component of the coordinating host. Upon heating a 2 : 3 mixture of 2,4,6-tri(3-pyridyl)benzene and the iridium complex at 60 °C in CD 3 NO 2 , a clear yellow solution was obtained.…”

Section: Application Of Porous Coordination Cages In Photocatalysismentioning

confidence: 99%

Recent advances in porous molecular cages for photocatalytic organic conversions

Peng

Liu

et al. 2023

Dalton Trans.

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“…In nature, the coordination of metal ions with organic substrates has been exploited to create various functional compounds, such as chlorophyll, vitamin B 12 , hemoglobin, etc. Compared to other weak noncovalent interactions, coordination bonds are advantageous in terms of their directionality and predictability. − Inspired by nature, chemists have utilized coordination-driven self-assembly strategies to construct discrete architectures from two-dimensional (2D) rings to three-dimensional (3D) cages with precise sizes and shapes, − which have applications in areas such as catalysis, cancer treatment, and optical materials; , among these architectures, 2,2′:6′,2″-terpyridine (tpy) as a building block has gained widespread attention owing to its remarkable binding ability to different transition-metal ions. ,− Compared to 2D rings, 3D nanocages demonstrate promising applications for anion recognition, − C 60 encapsulation, − and controlled release − because of their regular configuration with fixed-size cavities that can selectively encapsulate guest molecules …”

Section: Introductionmentioning

confidence: 99%

Construction of 1,3,5-Triazine-Based Prisms and Their Enhanced Solid-State Emissions

et al. 2023

Inorg. Chem.

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In this study, two trigonal prisms based on the 1,3,5-triazine motif (SA and SB), distinguished by hydrophobic groups, were prepared by the self-assembly of tritopic terpyridine ligands and Zn(II) ions. SA and SB exhibited high luminescence efficiencies in the solid state, overcoming the fluorescence quenching of the 1,3,5-triazine group caused by π–π interactions. Notably, SA and SB exhibited different luminescence behaviors in the solution state and aggregation state. SB with 12 alkyl chains exhibited extremely weak fluorescence in a dilute solution, but its fluorescence intensity and photoluminescence quantum yield (PLQY) were significantly enhanced in the aggregated state (with the increase in the water fraction), especially in the solid state. Different from the gradually enhanced efficiency of SB, the PLQY of SA gradually decreased with the increase in aggregation but still maintained a high luminescence efficiency. These two complexes exhibited different modes to solve the fluorescence quenching of 1,3,5-triazine in the solid state. The hierarchical self-assembly of SB exhibited nanorods owing to the hydrophobic interactions of alky chains, while SA aggregated into spheres under the influence of π–π interactions.

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An Ir₃L₂ complex with anion binding pockets: photocatalytic E–Z isomerization via molecular recognition

Abstract: A molecular host with photosensitizing centers provides photo-responsive host–guest properties based on its molecular recognition ability. Here, we construct a self-assembled photoactive Ir(III) cage-shaped complex that contains anion binding pockets...

Cited by 17 publications

References 32 publications

Supramolecular Coordination Cages for Artificial Photosynthesis and Synthetic Photocatalysis

Supramolecular Coordination Cages for Artificial Photosynthesis and Synthetic Photocatalysis

Recent advances in porous molecular cages for photocatalytic organic conversions

Construction of 1,3,5-Triazine-Based Prisms and Their Enhanced Solid-State Emissions

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