Tuning the self-assembly and photophysical properties of bi-1,3,4-thiadiazole derivatives through electron donor–acceptor interactions and their application in OLEDs

Yadav, Abhay Kumar; Pradhan, Balaram; Ulla, Hidayath; Nath, Subrata; De, Joydip; Pal, Santanu Kumar; Satyanarayan, M. N.; Achalkumar, Ammathnadu S.

doi:10.1039/c7tc01420a

Cited by 45 publications

(27 citation statements)

References 40 publications

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“…[ 43 ] The related thiadiazole‐based mesogens TIA‐3 were tested with respect to application in OLEDs as single emissive material or as guest in a polymeric host. [ 44 ] The host guest OLED devices clearly showed a higher efficiency and brightness of the blue emission. In this regard, a device consisting of poly(9‐vinylcarbazole) as host material with 5% of TIA‐3 (R 1 = R 2 = R 3 = OC 10 H 21 ) as emitting layer together with PVK:3T/10 (5 wt%) as the emitting layer together with bathocuproine (hole blocking layer) and tris‐(8‐hydroxyquinoline)aluminum (electron‐transporting layer) showed an external quantum efficiency of 0.63%.…”

Section: Synthetic Approachmentioning

confidence: 99%

Mesogens with aggregation‐induced emission properties: Materials with a bright future

Voskuhl

Giese

2021

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Within the past two decades, chromophores, which show aggregation-induced emission (AIE), have gained considerable attention with respect to the development of luminescent liquid crystals. In contrast to common luminogens, AIE emitters do not suffer from aggregation-caused quenching of the emission in the solid state. In this review, we summarize the recent development in the field of AIE-active liquid crystals and show first model devices, which already prove the application potential of these materials. Currently, three different approaches are followed, to get access to luminescent liquid crystals--namely the synthetic approach yielding luminescent mesogens, the doping approach, and the supramolecular approach, which will be described and discussed in detail in this review.

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Section: Synthetic Approachmentioning

confidence: 99%

Mesogens with aggregation‐induced emission properties: Materials with a bright future

Voskuhl

Giese

2021

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“…Because of their strong electron acceptability, they show attractive optical and electronic properties [24,25] . Similarly, there are many reports in the literature examining the remarkable properties of 1,3,4‐thiadiazole derivatives [26–31] . Especially, the substituted 1,3,4‐thiadiazole compounds have attracted increasingly significant attention due to their broad spectrum of pharmacological properties.…”

Section: Introductionmentioning

confidence: 99%

Studies on Antimicrobial, Antibiofilm, Efflux Pump Inhibiting, and ADMET Properties of Newly Synthesized 1,3,4‐Thiadiazole Derivatives**

et al. 2021

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The novel compounds bearing 1,3,4‐thiadiazole moiety were obtained and their structures were identified using FT‐IR, NMR methods, elemental, and mass analysis. UV‐Vis and fluorescence spectra were obtained in six different polarity solvents. In addition, antimicrobial, antibiofilm, and the efflux pump inhibiting activities of the new compounds on K. pneumoniae, methicillin‐resistant S. aureus (MRSA), E. coli, and C. albicans were investigated. Furthermore, druglikeness and ADMET properties of the compounds were determined. As a result, it was observed that some of the derivatives presented antimicrobial activity against K. pneumoniae, S. aureus, and C. albicans. But the MBC/MFC test showed that all the activities were bacteriostatic. In addition, these derivatives have the potential of using both inhibiting and activating biofilm formation depending on the concentration. 1,3,4‐thiadiazole derivatives also presented good efflux pump inhibition in K. pneumoniae and E. coli. ADMET tests showed that 1,3,4‐thiadiazole derivatives have the potential of being used as therapeutic compounds.

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“…Hence, emitters were only incorporated in simple OLED structures which often required drive voltages >8 V and achieved a maximum luminance of mostly <1000 cd m −2 at voltages higher than 10 V, [27][28][29][30][31] similar to other studies of liquid crystal-based OLEDs. [17,[32][33][34][35] In order to develop more efficient liquid crystalline OLEDs, the knowledge about the self-assembling properties of DLCs that the community has acquired over the past decades needs to be appropriately integrated with state-of-the-art OLED structures and with the functional materials used in these.…”

Section: Introductionmentioning

confidence: 99%

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

Keum

Becker

Archer

et al. 2020

Advanced Optical Materials

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Liquid crystalline materials possess great potential as emitters in organic light‐emitting diodes (OLEDs) due to their self‐assembling property, which may lead to anisotropic films and improved charge transport. Here, the key photophysical properties of the columnar liquid crystalline emitter perylene‐3,4,9,10‐tetracarboxylic tetraethyl ester (PTCTE) are investigated and the material is implemented into OLEDs. It is found that vacuum‐deposited PTCTE films exhibit preferential horizontal orientation of the transition dipole moment. Embedding the emitter into different host materials leads to increased photoluminescence quantum yield but reduces molecular orientation compared to the neat film. OLEDs containing PTCTE doped into an exciplex‐forming co‐host achieve very high luminance exceeding 10 000 cd m−2 at 5.7 V, which is among the best performances of OLEDs based on columnar liquid crystalline emitters reported so far.

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Tuning the self-assembly and photophysical properties of bi-1,3,4-thiadiazole derivatives through electron donor–acceptor interactions and their application in OLEDs

Abstract: Delicate interplay of donor–acceptor interactions in directing the self-assembly and its application.

Cited by 45 publications

References 40 publications

Mesogens with aggregation‐induced emission properties: Materials with a bright future

Mesogens with aggregation‐induced emission properties: Materials with a bright future

Studies on Antimicrobial, Antibiofilm, Efflux Pump Inhibiting, and ADMET Properties of Newly Synthesized 1,3,4‐Thiadiazole Derivatives**

Organic Light‐Emitting Diodes Based on a Columnar Liquid‐Crystalline Perylene Emitter

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