Benzothiazole-Based Bis-azo Cationic Fluorescent Dyes with Extended Conjugated Systems: Synthesis and Properties

Highly efficient single-component white light emitters (SWLEs), are attractive candidates for the simple and cost-effective fabrication of high-performance lighting devices. This study introduced a donor–π–acceptor and a donor–π–donor stilbene-based chromophores, representing pH-responsive fluorescence. The emitters showed yellow and green fluorescence in their neutral form. At the same time, protonation of the chromophores caused blue fluorescence color with a strong hypsochromic shift. The white light emission (WLE) for these chromophores was observed at approximately pH 3 due to the simultaneous presence of the neutral and protonated forms of the chromophores, covering almost all the emission spectra in the visible region (400–700 nm). These chromophores presented exceptional white light quantum yields (Φ) between 31 and 54%, which was desirable for producing white light-emitting devices. Density functional theory (DFT) and time-dependent (TD)-DFT were applied to study the structural and electronic properties of the chromophores.

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“…The solvent effects on fluorescence characteristic of a moleculecan be demonstrated by Lippert–Mataga (LM) formalism 57 : …”

Section: Resultsmentioning

confidence: 99%

New white light-emitting halochromic stilbenes with remarkable quantum yields and aggregation-induced emission

Panahi

Mahmoodi

Ghodrati

et al. 2022

Sci Rep

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show abstract

“…The solvent effects on uorescence characteristic of a molecule can be demonstrated by Lippert-Mataga (LM) formalism 57 :…”

Section: Resultsmentioning

confidence: 99%

New White Light-Emitting Halochromic Stilbenes with Remarkable Quantum Yields and Aggregation-Induced Emission

Panahi¹,

Mahmoodi²,

Ghodrati³

et al. 2021

Preprint

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Highly efficient single-component white light emitters (SWLEs), are attractive candidates for the simple and cost-effective fabrication of high-performance lighting devices. This study introduced a donor–π–acceptor and a donor–π–donor stilbene-based chromophores, representing pH-responsive fluorescence. The emitters showed yellow and green fluorescence in their neutral form. At the same time, protonation of the chromophores caused blue fluorescence color with a strong hypsochromic shift. The white light emission (WLE) for these chromophores was observed at approximately pH=3 due to the simultaneous presence of the neutral and protonated forms of the chromophores, covering almost all the emission spectra in the visible region (400-700 nm). These chromophores presented exceptional white light quantum yields (Φ) between 31-54%, which was desirable for producing white light-emitting devices. Density functional theory (DFT) and time-dependent (TD)-DFT were applied to study the structural and electronic properties of the chromophores.

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Thermal, physical and biological properties of new etheric dyes with chlorine and two azo groups of anthracene

Moanță

Carabet

Palarie

et al. 2023

J Therm Anal Calorim

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Benzothiazole-Based Bis-azo Cationic Fluorescent Dyes with Extended Conjugated Systems: Synthesis and Properties

Cited by 4 publications

References 43 publications

New white light-emitting halochromic stilbenes with remarkable quantum yields and aggregation-induced emission

New white light-emitting halochromic stilbenes with remarkable quantum yields and aggregation-induced emission

New White Light-Emitting Halochromic Stilbenes with Remarkable Quantum Yields and Aggregation-Induced Emission

Thermal, physical and biological properties of new etheric dyes with chlorine and two azo groups of anthracene

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