Thermally activated delayed fluorescence in an optically accessed soft matter environment

Micheva, Maria; Baluschev, Stanislav; Landfester, Katharina

doi:10.1039/d1tc04915a

Cited by 4 publications

(2 citation statements)

References 88 publications

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“…Accurate temperature sensing requires minimal autofluorescence and light scattering from a sample [4] . To overcome this difficulty, triplet‐triplet photon upconversion [5] and two‐photon absorption [6] are useful because of their low‐energy excitation. Recently, room‐temperature phosphorescent (RTP) materials have been shown to exhibit dual emission, based on fluorescence and phosphorescence, as steady‐state emission [7] .…”

Section: Introductionmentioning

confidence: 99%

Thermochromic Afterglow from Benzene‐1,4‐Diboronic Acid‐Doped Co‐crystals

Kawaguchi,

Sugawara,

Ito

et al. 2024

Chemistry A European J

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The accurate thermosensing requires a minimum impact of autofluorescence and light scattering from the samples. In this study, we discovered that benzene‐1,4‐diboronic acid (BDBA) doped co‐crystals with trimethylolpropane (TMP) exhibit excellent thermochromic dual phosphorescence properties over a wide temperature range from ‒132 to 40°C, despite its simple structure that does not have any donor‐acceptor linkage. The dual phosphorescence was consisted of monomeric benzene‐1,4‐diboronate (BDBA ester) and aggregation‐stabilized species. With an increase in temperature, the emission intensity from the monomeric state significantly decreased, whereas that originating from the aggregated state remained almost constant owing to the difference in their thermal stabilities. Further investigation revealed that molecular distortions in singlet excited states enable efficient intersystem crossing, causing efficient phosphorescence from the monomeric state of BDBA ester.

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Section: Introductionmentioning

confidence: 99%

Thermochromic Afterglow from Benzene‐1,4‐Diboronic Acid‐Doped Co‐crystals

Kawaguchi,

Sugawara,

Ito

et al. 2024

Chemistry A European J

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“…Photon upconversion techniques convert lower-energy photons into higher-energy ones and have been successfully applied in many research fields involving optical transduction and energy conversion. [1][2][3] Compared to upconversion techniques using multiphoton absorption, lanthanide nanoparticles and second harmonic nonlinear optical materials, triplet-triplet annihilation (TTA) upconversion has been valued in solar cells, [4][5][6][7] biological applications, 8,9 photocatalysis [10][11][12][13] and many other fields, [14][15][16][17][18] due to its low excitation power density and broad absorption and emission bands. A TTA upconversion system generally includes two parts, a sensitizer (donor) and an annihilator (acceptor).…”

Section: Introductionmentioning

confidence: 99%

Enhancing photon upconversion with thermally activated sensitization and singlet energy collection

et al. 2022

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Design, Synthesis, and Photophysical Characterization of Biocompatible Thermally Activated Delayed Fluorescent Carbazole‐Coumarins for Sensing Applications

Cocco,

Paniziutti,

Olla

et al. 2024

Chemistry A European J

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A series of fluorescent carbazole‐coumarins exhibiting good photoluminescence quantum yields and thermally activated delayed fluorescence (TADF) properties have been designed and synthetized using computer‐aided density functional theory calculations. The TADF characteristics of the carbazole‐coumarins were systematically explored both in solution and in the solid state, utilizing poly(methyl methacrylate) (PMMA) as a matrix. The study revealed that the introduction of carbazole units onto the coumarin benzene ring led to compounds with thermally induced reverse intersystem crossing and delayed fluorescence. The study further demonstrated the potential utility of these compounds in practical applications by incorporating them into a Cmr‐PMMA‐based sensor for molecular oxygen detection. The resulting sensor exhibited promising performance, highlighting the adaptability and efficacy of the synthesized TADF‐carbazole‐coumarin compounds for reversible molecular oxygen sensing.

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Thermally activated delayed fluorescence in an optically accessed soft matter environment

Abstract: Organic material compositions, able to demonstrate bright delayed fluorescence either by electrical excitation, or by optical excitation, are being applied in various fields of research, ranging from sunlight-powered photonic devices...

Cited by 4 publications

References 88 publications

Thermochromic Afterglow from Benzene‐1,4‐Diboronic Acid‐Doped Co‐crystals

Thermochromic Afterglow from Benzene‐1,4‐Diboronic Acid‐Doped Co‐crystals

Enhancing photon upconversion with thermally activated sensitization and singlet energy collection

Design, Synthesis, and Photophysical Characterization of Biocompatible Thermally Activated Delayed Fluorescent Carbazole‐Coumarins for Sensing Applications

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