Photoswitchable imines: aryliminopyrazoles quantitatively convert to long-lived Z-isomers with visible light

Chemical Science, Journal Year: 2024, Volume and Issue: 15(11), P. 3872 - 3878

Published: Jan. 1, 2024

Simple structural modifications significantly boost the photochromic performance of imine-based photoswitches. This work lays a foundation for exploring new motifs in light-addressable dynamic combinatorial chemistry.

Language: Английский

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Photoresponsive Supramolecular Cages and Macrocycles

ChemPlusChem, Journal Year: 2023, Volume and Issue: 88(12)

Published: Aug. 28, 2023

The utilisation of light to achieve precise manipulation and control over the structure function supramolecular assemblies has emerged as a highly promising approach in development complex, configurable, or multifunctional systems nanoscopic machine-like entities. In this minireview, we highlight recent examples self-assembled covalently bound cages macrocycles with focus on external internal functionalisation photoswitchable unit embedment photoswitch into framework structure. Functionalising interior exterior cage macrocycle photoresponsive group enables different properties, such guest binding assembly solid-state, while overall shape often undergoes no significant change. By directly integrating structure, isomerisation can either induce geometry change, disassembly, disassembly reassembly Historical covered review are based azobenzene, diarylethene, stilbene photoswitches, alkene motors that were incorporated constructed by metal-organic, dynamic covalent, covalent bonds.

Language: Английский

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Photoswitching of Co(ii)-based coordination cages containing azobenzene backbones

Chemical Science, Journal Year: 2024, Volume and Issue: 15(22), P. 8488 - 8499

Published: Jan. 1, 2024

Inclusion of photoswitchable azobenzene units as spacers into ditopic bridging ligands Lm and Lp, containing two chelating pyrazolyl-pyridine termini, allows formation metal complex assemblies with Co(ii) that undergo a range light-induced structural transformations. One notable result is the conversion Co2(Lp)3 dinuclear triple helicate (based on E ligand isomer) to C 3-symmetric Co4(Lp)6 assembly, assumed be an edge-bridged tetrahedral cage, based Z isomer. Another preparation series Co4(Lm)6 complexes, which Co4(E-Lm)6 was crystallographically characterised consists pair Co2(Lm)2 double helicates connected by additional span units, giving cyclic Co4 array in one then alternate around periphery. A set complexes could prepared different ratios : isomers (0 6, 2 4, 4 6 0) Co4(Z-Lm)2(E-Lm)4 particularly stable dominated speciation behaviour, either during switching geometry pre-formed or when were combined proportions preparation. These examples (i) interconversion between Co2L3 (helicate) (ii) Co4L6 (cage) Co4(Z-Lm)n(E-Lm)6-n Lm, constitute significant advances field supramolecular assemblies.

Language: Английский

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Phenolylazoindole scaffold for facilely synthesized and bis-functional photoswitches combining controllable fluorescence and antifungal properties using theoretical methods

Organic & Biomolecular Chemistry, Journal Year: 2024, Volume and Issue: 22(6), P. 1225 - 1233

Published: Jan. 1, 2024

Novel phenolylazoindole photoswitch derivatives can be facilely modified as functional molecules with stationary photoswitching properties.

Language: Английский

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Centennial Isomers: A Unique Fluorinated Azobenzene Macrocyclus with Dual Stability Over 120 Years

Advanced Functional Materials, Journal Year: 2024, Volume and Issue: 34(23)

Published: Feb. 13, 2024

Abstract A macrocyclic azobenzene with unique thermal stability, demonstrating potential for use in optical data storage material is presented: The Z ‐isomer of this novel photoswitch exhibits unparalleled a half‐life surpassing 120 years at 25 °C. This stability attributed to the strategic fluorination two ortho ‐ and both para ‐positions. Comparative analyses involving its non‐fluorinated counterpart, ‐only‐fluorinated variant, open‐chain analog are performed. Employing NMR UV–vis spectroscopy, X‐ray diffraction, alongside Arrhenius, Eyring, DFT calculations, revealed insights into extraordinary stability. Furthermore, when incorporated poly(methylmethacrylate), showcase efficient switching visible light solid state, emphasizing applications.

Language: Английский

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Potential for light-induced separation of critical rare-earth elements

Trends in Chemistry, Journal Year: 2024, Volume and Issue: 6(8), P. 432 - 446

Published: July 20, 2024

Language: Английский

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