Novel luminescent liquid crystalline polyazomethines. Synthesis and study of thermotropic and photoluminescent properties

Zabulica, Andrei; Perju, Elena; Brumă, Maria; Marin, Luminița

doi:10.1080/02678292.2013.852258

Cited by 33 publications

(11 citation statements)

References 40 publications

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“…To achieve higher polarised ratio, the same group modified the device structure with the addition of a layer of NPD to improve the hole-injection, inducing polarised EL with R = 21. 39 Poly(p-phenylenevinylene), 77,78 azobenzene derivatives 79,80 and polyacetylene 81 were also investigated for polarised emission. 39,75,76 The devices based on the oriented films of PFO in phase exhibited the best polarisation performance.…”

Section: Polymeric Fluorescent Lc Materialsmentioning

confidence: 99%

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

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Luminescent liquid crystals (LCs) materials have attracted significant interests for organic optoelectronic applications, especially for linearly polarised emission, becaused of their combination of ordered alignment and luminescence property. Since the first polarised organic light-emitting diodes (OLEDs) demonstration in 1995, remarkable progress has been done with polarised electroluminescence because of continuous advances with the design of suitable LC materials. In this Review, we summarize luminescent LC materials with representative examples based on fluorescent materials, phosphorescent materials, and lanthanide complexes. The structure-property relationships for polarised emission and, when available, electroluminescence of these materials are presented and discussed, with a focus on phosphorescent metallomesogens. We also present the rational behind the design and development of luminescent LCs materials for high efficiency polarised OLEDs, along with the challenges ahead to achieve efficient devices.

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Section: Polymeric Fluorescent Lc Materialsmentioning

confidence: 99%

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

et al. 2015

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“…[11] Polyazomethines are known to be π-conjugated polymeric materials, exhibiting good mechanical properties, high chemical resistance, high thermal stability, attractive fluorescence properties and either thermotropic or lyotropic LC behaviour. [12][13][14] They have been investigated by different methods, [12][13][14][15][16][17][18][19][20][21][22] also for their potential application in optoelectronics and non-linear optics [12][13][14][15][16][17][18][19][20] and as fluorimetric sensors. [21,22] Surprisingly, we found only two reports [7,9] on dielectric properties and two reports [16,23] on the dielectric current (DC) conductivity of polyazomethines.…”

Section: Introductionmentioning

confidence: 99%

Polyazomethine with m-tolylazo side groups: thermal, dielectric and conductive behaviour

et al. 2015

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2015): Polyazomethine with mtolylazo side groups: thermal, dielectric and conductive behaviour, Liquid Crystals, Using solution polycondensation, a new polyazomethine with m-tolylazo side groups (PAz) exhibiting thermotropic liquid crystalline phase was synthesised and its chemical structure was characterised with generally accepted methods. Its phase transition temperatures were detected with both polarising optical microscopy and differential scanning calorimetry. Using dielectric spectroscopy method, both real and imaginary parts of the permittivity were investigated in wide regions of temperature (from −100°C to 170°C) and frequency (from 1 Hz to 1 MHz). Analysis of frequency dependent permittivity allowed finding three relaxations (α, β 1 and β 2 ) in PAz. β-relaxations were described with the Arrhenius equation, whereas α-relaxation was described with the Vogel-Fulcher-Tammann equation. The alternating current conductivity (ACC) of PAz was studied in the same regions of temperature and frequency. The frequency dependent ACC was described with an exponent power equation. Presentation of ACC as a function of inverse temperature allowed us to describe ACC with the Arrhenius equation.

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“…Сочетание свойств азо-и азометиновой групп в одном полимере также может помочь в создании многофункциональных материалов. Например, ЖК-полиазометины могут приобрести люминесценцию [121].…”

Section: синтез и свойства полиазометиновunclassified

,Polyazomethines. Synthesis, properties and applications (review)

Ovdenko¹,

Syromyatnikov²,

Kolendo³

2017

polymmattech

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Novel luminescent liquid crystalline polyazomethines. Synthesis and study of thermotropic and photoluminescent properties

Cited by 33 publications

References 40 publications

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

Recent progress in luminescent liquid crystal materials: design, properties and application for linearly polarised emission

Polyazomethine with m-tolylazo side groups: thermal, dielectric and conductive behaviour

,Polyazomethines. Synthesis, properties and applications (review)

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