Ruthenium complexes of hexakis(cyanophenyl)[3]radialenes and their di(cyanophenyl)methane precursors: synthesis, photophysical, and electrochemical properties

3]Radialene has a peculiar topology and cross-conjugation system, representing a unique molecular scaffold in organic materials. Herein, we report a special class of stereoisomeric α-cyano triaryl-[3]radialenes (CTRs) that show concentration-caused quenching in solution but emit red-shifted and enhanced luminescence in the crystalline state. Clustering of multiple cyano groups and their through-space interactions with the [3]radialene ring significantly extend π-electron communication meanwhile rigidifying the propeller conformation multivalently, thus playing a key role behind the state-dependent luminescence. These radialenes with a substantial electron affinity undergo a reversible electron transfer transition to anionic radicals with good stability, showing switching of photoabsorption, photoluminescence and electron spin resonance (ESR) signal. We also established proof-of-concept applications of CTRs for multimodal information encryption and chemical sensing.

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α‐Cyano Triaryl[3]radialene: Unsymmetrical Stereo‐configuration, Clustering‐enhanced Excimer Emission, and Radical‐involved Multimodal Information Switching

Liu

Zhou

et al. 2023

Angewandte Chemie

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α‐Cyano Triaryl[3]radialene: Unsymmetrical Stereo‐configuration, Clustering‐enhanced Excimer Emission, and Radical‐involved Multimodal Information Switching

Liu

Zhou

et al. 2023

Angew Chem Int Ed

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Preparation, crystal structures and properties of half-sandwich ruthenium complexes containing salicylbenzoxazole ligands

Sun

Dai

Xue

et al. 2015

Journal of Coordination Chemistry

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Ruthenium complexes of hexakis(cyanophenyl)[3]radialenes and their di(cyanophenyl)methane precursors: synthesis, photophysical, and electrochemical properties

Cited by 3 publications

References 43 publications

α‐Cyano Triaryl[3]radialene: Unsymmetrical Stereo‐configuration, Clustering‐enhanced Excimer Emission, and Radical‐involved Multimodal Information Switching

α‐Cyano Triaryl[3]radialene: Unsymmetrical Stereo‐configuration, Clustering‐enhanced Excimer Emission, and Radical‐involved Multimodal Information Switching

α‐Cyano Triaryl[3]radialene: Unsymmetrical Stereo‐configuration, Clustering‐enhanced Excimer Emission, and Radical‐involved Multimodal Information Switching

Preparation, crystal structures and properties of half-sandwich ruthenium complexes containing salicylbenzoxazole ligands

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