Efficient red hybridized local and charge-transfer OLEDs by rational isomer engineering

Zhou, Changjiang; Liu, Yafei; Sun, Zilin; Liu, He; Xu, Lei; Hu, Dehua; Hu, Jun

doi:10.1016/j.dyepig.2022.110488

Cited by 3 publications

(2 citation statements)

References 56 publications

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“…One strategy to potentially improve TADF properties entails the investigation of positional or regio-isomers via ‘isomeric modulation’. 20–31 In the case of red TADF emitters, this generally involves the relocation of donor units and/or auxiliary acceptor groups ( e.g. nitriles) on a rigid acceptor core and assessing how this affects the emission wavelength, PLQY, and TADF efficiency.…”

Section: Introductionmentioning

confidence: 99%

Isomeric modulation of thermally activated delayed fluorescence in dibenzo[a,c]phenazine-based (deep) red emitters

Brebels,

Cardeynaels,

Jackers

et al. 2024

J. Mater. Chem. C

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Section: Introductionmentioning

confidence: 99%

Isomeric modulation of thermally activated delayed fluorescence in dibenzo[a,c]phenazine-based (deep) red emitters

Brebels,

Cardeynaels,

Jackers

et al. 2024

J. Mater. Chem. C

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“…Among them, the non-equivalent hybridization emitter is easy to de-hybridize by external stimulation because of the unbalanced LE and CT components, and thus to exhibit sensing properties with changes in color and emission intensity. [44][45][46][47] It means that the highly efficient fluorescent probe can be expected to achieve through the excited state regulation. [48] What is more, the fluorescence decay of HLCT emitter associates with fast nanosecond process, guaranteeing a high sensitivity and a shortened response time.In this work, we reported a novel fluorescence probe of 4-(acridin-9-yl)-N,N-diphenylaniline (TPA-9AC) to detect propanol isomers with high sensitivity.…”

mentioning

confidence: 99%

An Ultra‐Sensitive Fluorescent Probe Based on Hybridized Local and Charge‐Transfer Materials for Quantitative Detection of Propanol Isomers

Zhou

Liu

Chen

et al. 2023

Advanced Optical Materials

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to distinguish propanol isomers such as Lucas test, silver mirror reaction, nuclear magnetic resonance, and Fourier transformed infrared spectrophotometer are usually complex and costly. [11][12][13][14][15] More importantly, these methods can only qualitatively distinguish two isomer solutions, but not quantitatively give out the proportions of propanol isomers components. Owing to their extremely similar physical and chemical properties, the efficient methods to distinguish propanol isomers remain scarce, let alone the quantitatively detection of n-propanol in isopropanol solvent. [16][17][18] Fluorescence-based sensors exhibit promising potential in biology, pharmacology, and environmental fields due to their low-cost, excellent selectivity and sensitivity, quick detection, and low detection limits. [19][20][21][22][23][24][25][26][27][28][29][30][31] Unfortunately, there are currently no fluorescent probes reported to detect propanol solvents, especially for the distinction of propanol isomers. Considering the difference of electron-withdrawing abilities between isopropanol and n-propanol isomers, one of the promising solutions is to design a fluorescent probe that is sensitive to them due to the change of excited state characteristic.Recently, Ma and Yang reported a series of hybridized local and charge-transfer (HLCT) materials. [32][33][34][35][36][37][38][39][40][41][42][43] These novel HLCT emitters simultaneously exhibited the locally-excited (LE) state character and the charge-transfer (CT) state character, guaranteeing both high photoluminescence quantum yields (PLQYs) and stimuli-responsive functionalization. Among them, the non-equivalent hybridization emitter is easy to de-hybridize by external stimulation because of the unbalanced LE and CT components, and thus to exhibit sensing properties with changes in color and emission intensity. [44][45][46][47] It means that the highly efficient fluorescent probe can be expected to achieve through the excited state regulation. [48] What is more, the fluorescence decay of HLCT emitter associates with fast nanosecond process, guaranteeing a high sensitivity and a shortened response time.In this work, we reported a novel fluorescence probe of 4-(acridin-9-yl)-N,N-diphenylaniline (TPA-9AC) to detect propanol isomers with high sensitivity. Theoretical calculations combined with photophysical experiments show that TPA-9AC exhibits non-equivalent hybridization features and high PLQYs.Isopropanol has been widely applied in various fields as an important chemical solvent, which is produced by direct hydration of propylene accompanied with the byproduct of n-propanol. Herein, an ultra-sensitive fluorescent probe of TPA-9AC, based on a non-equivalent hybridized local and charge-transfer (HLCT) material, is designed and synthesized to quantitatively detect the percentage of n-propanol in propanol isomers. Owing to the stronger electron acceptor ability of n-propanol, the excited state of probe transfers from highly emissive HLCT state to non-emissive charge-transfer s...

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Enhanced π-conjugation in hybridized local and charge transfer state by intramolecular hydrogen bonding to construct efficient red emitters for OLEDs and cellular imaging

Yan

Yao

et al. 2023

Dyes and Pigments

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Efficient red hybridized local and charge-transfer OLEDs by rational isomer engineering

Cited by 3 publications

References 56 publications

Isomeric modulation of thermally activated delayed fluorescence in dibenzo[a,c]phenazine-based (deep) red emitters

Isomeric modulation of thermally activated delayed fluorescence in dibenzo[a,c]phenazine-based (deep) red emitters

An Ultra‐Sensitive Fluorescent Probe Based on Hybridized Local and Charge‐Transfer Materials for Quantitative Detection of Propanol Isomers

Enhanced π-conjugation in hybridized local and charge transfer state by intramolecular hydrogen bonding to construct efficient red emitters for OLEDs and cellular imaging

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