Optical and electrochemical properties of thermostable polymers containing light-emitting units

Damaceanu, Mariana‐Dana; Jarząbek, Bożena; Brumă, Maria

doi:10.1002/pen.23645

Cited by 4 publications

(3 citation statements)

References 34 publications

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“…The absorption spectra of the polymer films P show three absorption maxima at 289, 313, and 338 nm (Figure 6(a)), attributed to three independent chromophores, namely, fluorene (289 nm), 23 oxadiazole (313 nm), 24 and the chromophore resulted by the conjugation of azomethinephenyl-oxadiazole framework (338 nm). 25 The photoluminescence spectrum of P exhibits UV light emission with a maximum that red shifts while the wavelength of exciting light increases (Figure 6(b)).…”

Section: Photophysical Behaviormentioning

confidence: 99%

Organic–inorganic hybrid nanomaterials based on inorganic oxides and a mesomorphic polyazomethine

Perju¹,

Ghimpu²,

Hitruc³

et al. 2015

High Performance Polymers

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Organic-inorganic hybrid materials have been obtained by impregnating a mesomorphic polyazomethine into a porous inorganic matrix of zinc oxide (ZnO), tin dioxide (SnO 2 ), or mixed ZnO/SnO 2 . The porous inorganic matrix has been obtained by magnetron sputtering technique and proved a very high crystallinity degree. The resulting hybrid materials were characterized from morphological and optical points of view by scanning electron microscopy, atomic force microscopy, and ultraviolet-visible and photoluminescence spectroscopy. The inorganic matrix itself exhibited a highly rough surface, which became smoother after polymer impregnation, indicating its complete coverage. The violet emission of the separate inorganic and organic components turned into a blue and green light emission, respectively, of the hybrid materials, suggesting the possibility to modulate the color of emitted light by the simple choice of the inorganic matrix. Considerations with regard of interface phenomena that prompted the photophysical changes of the hybrid materials were done.

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Section: Photophysical Behaviormentioning

confidence: 99%

Organic–inorganic hybrid nanomaterials based on inorganic oxides and a mesomorphic polyazomethine

Perju¹,

Ghimpu²,

Hitruc³

et al. 2015

High Performance Polymers

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“…Some polyoxadiazoles display semiconducting properties, others can be electrochemically doped, thus becoming electroconductors. The electronic and optical properties combined with their high heat resistance made them attractive for applications in microelectronics, optoelectronics, advanced telecommunications or other related fields [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

The Redox and Optical Response of the Electrogrowth Film from a Mixture of 2,5-Bis[4-(<i>p</i>-Aminophenoxy)Phenylene]-1,3,4-Oxadiazole and Fluorene

Damaceanu

2019

KEM

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Electrochemical copolymerization of 2,5-bis[4-(p-aminophenoxy)phenylene]-1,3,4-oxadiazole (Ox) with fluorene (Fl) was carried out via consecutive multisweep cyclic voltammetry. The electrogrowth process was conducted in the potential range between 0 and 1.8 V, at a scan rate of 50 mV/s. The FTIR spectroscopy was used to solve the issues concerning the way of monomers linkage in the copolymer structure. A deep investigation of the electrogenerated copolymer film characteristics was performed by scanning electron microscopy, UV-Vis and fluorescence spectroscopy, and cyclic voltammetry.

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“…On the other hand, aromatic poly(1,3,4-oxadiazole)s have been widely studied owing to their high thermal stability in oxidative atmosphere and specific properties determined by the electronic structure of 1,3,4-oxadiazole ring [26] Besides their outstanding resistance to high temperature, polyoxadiazoles are known to have a combination of many valuable properties, such as good hydrolytic stability, high glass transition temperature, tough mechanical properties, and low dielectric constants [27][28][29][30][31][32]. Polyoxadiazoles exhibit excellent fiber-and film-forming capability, which provides great potential for applications in fields of aerospace, military, protective garments, filtering fabrics and general industry.…”

Section: Introductionmentioning

confidence: 99%

Local and segmental motion in highly transparent and low-k poly(ether-imide) films

Damaceanu

Brumă

2014

J Polym Res

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One series of poly(ether-imide)s containing oxadiazole units have been studied with respect to the relationship between the chains structure and their physical properties, particularly thermal transitions and dielectric behavior with emphasis on the local and segmental motion, and optical clarity. High-temperature solution polycondensation reactions of an oxadiazole-containing diamine with different bis(etheranhydride)s resulted in easy soluble polymers with high molecular weights. The variation of the real and imaginary parts of the dielectric permittivity in a large frequency range, from 10 to 10 6 Hz, and in a wide temperature domain, from −150 to 250°C of the tough free-standing films prepared from these polymers was registered. The dielectric constant values, measured at room temperature and in the frequency domain of 10 Hz −1 MHz, were lower or comparable with those of Kapton HN film measured under similar conditions. The dielectric spectroscopy data were corroborated with the dynamo-mechanical analysis ones to highlight the subglass and glass relaxations encountered in these polymer films. The γ and β sub-glass viscoelastic and dielectric relaxations were explored in order to understand their molecular origins, being discussed in correlation with polymers repeating unit structure. The optical transparency of the poly(ether-imide) films has been also studied, to survey their potential for use as flexible substrates in electronic and optical devices.

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Optical and electrochemical properties of thermostable polymers containing light-emitting units

Cited by 4 publications

References 34 publications

Organic–inorganic hybrid nanomaterials based on inorganic oxides and a mesomorphic polyazomethine

Organic–inorganic hybrid nanomaterials based on inorganic oxides and a mesomorphic polyazomethine

The Redox and Optical Response of the Electrogrowth Film from a Mixture of 2,5-Bis[4-(<i>p</i>-Aminophenoxy)Phenylene]-1,3,4-Oxadiazole and Fluorene

Local and segmental motion in highly transparent and low-k poly(ether-imide) films

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