Tuning the fluorescence behavior of liquid crystal molecules containing Schiff-base: Effect of solvent polarity

Satapathy, Alok; Behera, Santosh Kumar; Yadav, Ankit; Mahour, Laxmi Narayan; Yelamaggad, C. V.; Sandhya, K. L.; Sahoo, Balaram

doi:10.1016/j.jlumin.2019.02.056

Cited by 32 publications

(8 citation statements)

References 36 publications

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“…Schiff bases and their complexes with transition metals have been extensively explored in the pursuit of their applications in various areas including nonlinear optics, molecular/metal ion sensing, dye-sensitized solar cells, molecular magnetism and photoluminescence (PL). [33][34][35][36] This group of organic compounds was reported by Hugo Schiff (1834-1915) and was named Schiff bases after him. 37 The condensation reaction between the carbonyl groups and primary amines produces an azomethine group (-N=C-) containing Schiff bases.…”

Section: Schiff Bases and Their Complexesmentioning

confidence: 96%

Schiff Bases and Their Complexes in Organic Light Emitting Diode Application

Kagatikar

Sunil

2021

J. Electron. Mater.

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Optoelectronics is an active area of research and, for few decades, development of different semiconducting materials with a wide emission window has attracted researchers. Organic light emitting diodes (OLEDs) are primarily utilized in displays and light sources that greatly contribute towards the conservation of energy and do not need a backlight for displays. Development in device efficiency, lifetime and stability is now a major concern in this particular application, and designing efficient material for OLEDs has been an active field of research for decades. Metal-organic compounds possess different optical and electronic properties due to metal and organic ligand interactions which are primarily used in OLEDs. This review is mainly focused on the Schiff bases and their metal chelates as a pure emitting layer or as a dopant material for the fabrication of R/G/B/white emitting devices. Moreover, future prospects to explore further to advance research in the OLED arena are also discussed. Graphic Abstract

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Section: Schiff Bases and Their Complexesmentioning

confidence: 96%

Schiff Bases and Their Complexes in Organic Light Emitting Diode Application

Kagatikar

Sunil

2021

J. Electron. Mater.

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“…The synthetic pathways for the synthesis of corresponding compounds were given (3,5,7,9) in Schemes 1 and 2 (11,12). The treatment of 4-amino-1,-5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one…”

Section: Synthesis and Characterizationmentioning

confidence: 99%

“…3.1.6 | (1S,2S,N1,N2)-N1,N2-bis ((2-methyl-1H-indol-3-yl)methylene) cyclohexane-1,2-diamine (12) To a solution of 2-methylindoline-3-carbaldehyde (4) (3.2 g, 20 mmol) in dry methanol (15 ml) was added trans-1,2-cyclohexane diamine 10 (1.1 g, 10 mmol) in dried methanol (10 ml) slowly via micropipette for 120 min. The reaction mixture was stirred for overnight at reflux temperature.…”

Section: Synthesis Of (E)-15-dimethyl-2-phenyl-4-(thiophen-2-ylmetmentioning

confidence: 99%

“…Three new (5,11,12) and three known (3, 7, 9) SBs were synthesized efficiently in high yields. The addition of aldehyde slowly into the reaction medium is important for product yield.…”

Section: Reducing Powermentioning

confidence: 99%

“…[ 9 ] Due to the electron‐donating ability, SBs could be used in the field of coordination chemistry extensively. [ 10 ] SBs are among the most chiefly used organic compounds, revealing a wide range of applications, such as electroluminescent effects, [ 11 ] fluorescence properties, [ 12 ] nonlinear optical properties, [ 13 ] chemosensory. [ 14 ] In addition, SBs and their metal complexes have showed a large variety of biological activity in recent research, including anticancer, antioxidant, [ 15 ] antibacterial, antibiofilm, anti‐inflammatory, hemocompatibility, cytotoxic, [ 16 ] pesticidal, nematicidal activities.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization, and antioxidant activity of heterocyclic Schiff bases

Kızılkaya

Dağ

Aral

et al. 2020

J Chinese Chemical Soc

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Schiff base derivatives have gained great importance due to revealing a great number of biological properties. Schiff bases were synthesized by treatment of 4-amino-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (1) with various aldehydes in methanol at reflux. In addition, diamine was reacted with an aldehyde to yield the corresponding Schiff bases. The structures of synthesized Schiff bases were elucidated by spectroscopic methods such as microanalysis, 1 H-NMR, 13 C-NMR, and FTIR. Antioxidant activities of synthesized Schiff bases were carried out using different antioxidant assays such as 1,1-diphenyl-2-picryl-hydrazyl free radical (DPPH •) scavenging, 2,2 0-azino-bis (3-ethylbenzthiazoline-6-sulfonic acid) (ABTS) radical scavenging, and reducing power activity. (E)-4-((1H-indol-3-yl)methyleneamino)-1,5-dimethyl-2-phenyl-1H-pyrazol-3(2H)-one (3), (E)-1,5-dimethyl-4-((2-methyl-1H-indol-3-yl) methyleneamino)-2-phenyl-1H-pyrazol-3(2H)-one (5), (E)-1,5-dimethyl-2-phenyl-4-(thiophen-2-ylmethyleneamino)-1H-pyrazol-3(2H)-one (7), (E)-1,5-dimethyl-2-phenyl-4-(quinolin-2-ylmethyleneamino)-1H-pyrazol-3(2H)-one (9), (1S,2S, N1,N2)-N1,N2-bis((1H-indol-3-yl)methylene)cyclohexane-1,2-diamine (11), and (1S,2S,N1,N2)-N1,N2-bis((2-methyl-1H-indol-3-yl)methylene)cyclohexane-1,2-diamine (12) were synthesized in high yields. Compound 5 displayed a good ABTS •+ activity. Compound 3 revealed the outstanding activity in all assays. Compound 7 has the best-reducing power ability in comparison to other synthesized compounds. Although compounds 5, 11, 12 are new, compounds 3, 7, 9 are known. Due to revealing a good antioxidant activity, the synthesized compounds (3, 5, 7) have the potential to be used as synthetic antioxidant agents.

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Recent Progress in Functional Dye‐Doped Liquid Crystal Devices

Shen

Zhang

Miao

et al. 2022

Adv Funct Materials

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As a typical representative of dopants, organic functional dyes have demonstrated their significant roles in novel smart liquid crystal (LC) devices, and dye-doped LCs have also been a source of inspiration for scientists to design and fabricate stimuli-gated materials or devices for envisioned applications in a wide range of areas. In this review, the focus on dichroic dyes, fluorescent dyes, and photothermal dyes, and the recent progress of the LC devices employing these dyes as dopants are overviewed. The review highlights the developments of the novel LC devices doped with these dyes. The structures, designs, and applications of these devices are outlined. The underlying principles of dichroic dyes, fluorescent dyes, and photothermal dyes which are utilized as functional dopants in LC devices are first introduced. Subsequently, the novel developments of functional dye-doped LC devices in the application fields of smart windows, attenuators for augmented reality (AR) systems, color-changeable textiles, dichroic color filters, dual-mode circular polarizers, chirality detectors, optical limiters, switchable luminescent solar concentrators, multiple information encryption, anti-counterfeiting, photo-addressed transparent displays, circularly polarized luminescence, tunable lasers, and light-driven soft actuators are discussed. Finally, the challenge and the strategies for the future improvement of dye-doped LC devices are also discussed.

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Tuning the fluorescence behavior of liquid crystal molecules containing Schiff-base: Effect of solvent polarity

Cited by 32 publications

References 36 publications

Schiff Bases and Their Complexes in Organic Light Emitting Diode Application

Schiff Bases and Their Complexes in Organic Light Emitting Diode Application

Synthesis, characterization, and antioxidant activity of heterocyclic Schiff bases

Recent Progress in Functional Dye‐Doped Liquid Crystal Devices

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