Luminescence property of poly(1,3-bis(phenyl-1,3,4-oxadiazole))s containing polar groups in the main chain

Huda, Muhsina K.; Dolui, Swapan Kumar

doi:10.1016/j.jlumin.2010.06.027

Cited by 14 publications

(8 citation statements)

References 32 publications

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“…All these compounds are readily soluble in common organic solvents like EtOH, CHCl 3 , DCM and THF etc. Their structural identities and purities were conrmed by 1 H NMR, 13 C NMR, IR and MS and were found to be in good agreement with the proposed structures.…”

Section: Synthesis and Characterizationsupporting

confidence: 72%

“…The most successful and sensible OLEDs are better substitute for liquid crystal-based devices, 1 because of their comparatively low power consumption, compatibility with large area and flexible substrates, and tuneability by molecular structure modification. [13][14][15][16] By employing donor/acceptor strategy one can improve the device efficiency and operational lifetime along with fluorescence properties. [4][5][6][7] Compared to other display technologies, OLEDs show their own unique advantages like, easy processing, self-luminescence, high brightness, high efficiency, low drive voltage, wide viewing angle, high contrast and high-speed response.…”

Section: Introductionmentioning

confidence: 99%

“…In designing OLEDs, a luminescent material is required in which electron and hole are recombined resulting in the emission of light. [13][14][15][16] By employing donor/acceptor strategy one can improve the device efficiency and operational lifetime along with uorescence properties. 17 In order to achieve high uorescence, small bipolar molecules can be designed by incorporating electron-withdrawing groups like 1,3,4-oxadiazole, phosphineoxide, triazine and electron-donating groups like carbazole, diphenylamine etc.…”

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and optoelectronic investigations of bithiophene substituted 1,3,4-oxadiazole derivatives as green fluorescent materials

et al. 2015

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A series of novel unsymmetrical bithiophene substituted oxadiazole derivatives 2(a-e) were designed and synthesised by employing palladium catalysed Suzuki cross coupling reaction. These bipolar molecules consist of bithiophene as an electron donor unit (D) and electron transporting oxadiazole as acceptor unit (A). The structural integrity of all the new compounds was confirmed by 1 H NMR, 13 C NMR and LC-MS analysis. The photo physical and electrochemical properties have been studied in detail using UV-Vis absorption, fluorescence spectroscopy and CV measurements. All compounds emit intense green fluorescence with better quantum yields. Density Functional Theory computations have been carried out for the better understanding of structure-property relationship, the computed values are found to be in good agreement with the experimental results. The results demonstrated that the novel bithiophene containing oxadiazole derivatives could play important role in organic optoelectronics.

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Section: Synthesis and Characterizationsupporting

confidence: 72%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Synthesis, characterization and optoelectronic investigations of bithiophene substituted 1,3,4-oxadiazole derivatives as green fluorescent materials

et al. 2015

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“…It should be mentioned that already early reports on oxadiazole based polymers as electroluminescent devices [21,22] report strong emission in the blue wavelength range and also a relatively stable behavior even under normal ambient conditions [23,24]. Another particular interesting feature of these polymers is the low overlap of emission and absorption spectra, so that the reabsorption is minimized [24], which results in a high overall efficiency, when using this type of polymer as active layer in LEDs [25].…”

Section: Sample Structure and Preparationmentioning

confidence: 99%

Oxadiazole Based Polyether as Sensitive Films for Ratiometric Optical Temperature Detection

et al. 2016

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A new type of polymer, based on the oxadiazole group, has been tested as indicator material for a ratiometric photoluminescence and optical reflection based temperature sensor in the temperature range between 30 ∘ C and 60 ∘ C. Thin films of the new polymer have been deposited by spin-coating on a glass substrate, excited by means of a low-cost near UV-LED. The optical spectrum, as detected by a fiber-based PC-card optical spectrometer, consisted of the reflection peak at the excitation wavelength and two distinct photoluminescence peaks at 430 nm and 480 nm, both in the blue spectral region. The peak amplitudes of all three spectral peaks depend linearly on the exciting light intensity. Changing the sample temperature, all peak amplitude values decrease monotonously with increasing temperature. By using a ratiometric approach, it has been found that the ratio between the two photoluminescence peaks was almost constant with temperature, while the ratio between the main photoluminescence peak at 430nm and the reflection peak around 380 nm scaled nicely with the ambient temperature. Therefore, it has been proposed to use the latter criterion and a simple polynomial fit to the temperature versus peak amplitude relation.

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“…However, fluorescent molecules still have unresolved complications such as operational stability of the devices and color shift after the operation. These problems can be resolved by introducing different substituent to the structure backbone, and hence, the steric functionalization of the core organic moiety is necessary .…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Photophysical and Computational Study of Novel Coumarin‐based Organic Dyes

Kumbar

Sannaikar

Shaikh

et al. 2018

Photochem & Photobiology

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A series of novel coumarin pyrazoline moieties combined with tetrazoles, 3-(1-phenyl-4-(1H-tetrazol-5-yl)-1H-pyrazol-3-yl)-2H-chromen-2-one, 6-chloro-3-(1-phenyl-4-(1H-tetrazol-5-yl)-1H-pyrazol-3-yl)-2H-chromen-2-one, 6-bromo-3-(1-phenyl-4-(1H-tetrazol-5-yl)-1H-pyrazol-3-yl)-2H-chromen-2-one and 6-bromo-3-(1-(4-bromophenyl)-4-(1H-tetrazol-5-yl)-1H pyrazol-3-yl)-2H-chromen-2-one7(a-d), were designed and synthesized. Single crystal X-ray diffraction and their interactions were studied by Hirshfeld surface analysis. Thermal stabilities and electrochemical properties of these compounds were examined from differential scanning calorimetry (DSC), thermogravimetric (TGA) and cyclic voltammetric (CV) studies. Their spectroscopic properties were analyzed in various alcohols and general solvents by UV-Vis absorption, fluorescence and time-resolved spectroscopy. In addition, the ground and excited state electronic properties were investigated using density functional theory (DFT). The calculated highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) and energy band gap (E ) values have revealed the effect of substitution of halogens. The substitution has equally affected the ground and excited states of 7(a-d) compounds. The solvatochromism on absorption, fluorescence spectra and fluorescence lifetimes of these compounds was investigated. All these results showed the chromen-2-one of pyrazoline tetrazole derivatives could play an important role in photonic and electronic devices.

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Luminescence property of poly(1,3-bis(phenyl-1,3,4-oxadiazole))s containing polar groups in the main chain

Cited by 14 publications

References 32 publications

Synthesis, characterization and optoelectronic investigations of bithiophene substituted 1,3,4-oxadiazole derivatives as green fluorescent materials

Synthesis, characterization and optoelectronic investigations of bithiophene substituted 1,3,4-oxadiazole derivatives as green fluorescent materials

Oxadiazole Based Polyether as Sensitive Films for Ratiometric Optical Temperature Detection

Synthesis, Photophysical and Computational Study of Novel Coumarin‐based Organic Dyes

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