Unconventional Luminescence Polymer with Color‐Tunability based on Solvent‐induced Electrostatic Potential Distribution of Fluorophore

Angewandte Chemie, Journal Year: 2024, Volume and Issue: 136(47)

Published: Aug. 13, 2024

Abstract Tuning full‐color emission of polymers holds significant promise. However, preparing unconventional luminescence with color‐tunability in dilute solution and understanding the relationship between non‐covalent interactions luminescent behavior remains a great challenge. We report two emitters (P1 P2) incorporating tetracoordinate boron. The P1 non‐conjugated D‐π‐A structure, exhibited red delayed fluorescence at 645 nm quantum yield 9.15 % aggregates. Notably, wavelength can be tuned from 418 to 588 different solvent. Similarly, P2 also adjusted by manipulating solvent fluorophore. Experimental characterization theoretical calculations indicate that B←N bond electronic fluorophore significantly regulate equilibrium electrostatic potential (ESP) intramolecular O⋅⋅⋅O P1, thereby modulating its wavelength. Additionally, these showed excellent fluoride ions detection. This work provides new insights into complex effects intermolecular on properties.

Language: Английский

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3‐Ethoxysalicylaldimine‐based symmetrical azine‐linked luminogen exhibiting ESIPT and bright orange colour AIE behaviour with live cell bioimaging application

Luminescence, Journal Year: 2024, Volume and Issue: 39(9)

Published: Sept. 1, 2024

Abstract Herein, we describe the design and development of a new cell‐permeable aggregation‐induced emission (AIE) active 3 ‐ethoxysalicylaldimine‐based symmetrical azine molecule HDBE . The synthesized compound underwent comprehensive investigation different spectroscopic methods, like NMR, mass single crystal X‐ray diffraction analysis. fluorophore exhibited bright orange colour AIE behaviour in THF–H 2 O mixture. drastic enhancement was achieved upon adding water to THF solution , with concentration 90%. Along dynamic light scattering (DLS) quantum yield measurements, formation aggregates also verified by scanning electron microscopy (SEM) transmission (TEM) Further, demonstrated excited state intramolecular proton transfer (ESIPT) characteristics polarity solvents, which corroborated absorption, lifetime spectroscopical investigations. detailed scrutiny structure displayed two strong hydrogen bonding interactions, while solid‐state fluorescent spectra showed dual that corresponds enol keto form confirming ESIPT feature. non‐toxic cell‐permeable, making it easy label as biomarker live HeLa cells via bioimaging. These studies offer quick way develop both ESIPT‐coupled molecules for cell bioimaging applications.

Language: Английский

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Pyrazine‐Based Chiral AIE Electronic Acceptors for Real‐Time Monitoring Hierarchical Self‐Assembly and Tuning Emissions through Intermolecular Charge‐Transfer Effects

Advanced Optical Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 3, 2024

Abstract Development of chiral aggregation‐induced emission (AIE) materials toward hierarchical self‐assembly is crucial to reveal the origin and evolution life. In this work, a pair AIE enantiomers fabricated by attaching typical units binaphthyl core via single bond linkage. The behavior inherited from introduced unit while can not only improve photo‐physical properties but also provide whole molecules with chirality. Moreover, as driven dipolar structure chirality AIEgens, different morphologies such spheres, ribbons or fibers, flowers, even bigger structures various sizes be dynamically monitored assembled time, which provided favorable evidence study structural molecular level higher‐level structure. On other hand, these AIEgens act strong electronic acceptors due unit. By complexing them donors, resulting intermolecular charge transfer induce remarkable red emissions tunable much their individuals. This enabled it facile, economic, flexible approach develop organic photoelectric materials.

Language: Английский

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