Synthesis, characterization, and OLED application of oligo(p-phenylene ethynylene)s with polyhedral oligomeric silsesquioxanes (POSS) as pendant groups

Ervithayasuporn, Vuthichai; Abe, Junichi; Wang, Xin; Matsushima, Toshinori; Murata, Hideyuki; Kawakami, Yusuke

doi:10.1016/j.tet.2010.10.009

Cited by 58 publications

(41 citation statements)

References 35 publications

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“…The cured samples were subjected to TG analysis. 1 H NMR (300 MHz), 13 C NMR (75 MHz), and 29 Si MNR (59 MHz) spectra were recorded on a Varian XL 300 spectrometer at room temperature using CDCl 3 as solvent. FT-IR spectra were recorded on a Bruker Tensor 27 Fourier Transform spectrometer equipped with a SPECAC Golden Gate diamond ATR unit.…”

Section: Curing Proceduresmentioning

confidence: 99%

“…Their popularity and multifarious applications stem from their useful physicochemical properties, ease of chemical modification, reactivity, and nanometric-size [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. From the point of view of chemical synthesis, particularly important are those with reactive functional groups e.g., hydrogen atoms, vinyl, amino, methacryloxy, or chloralkyl ones.…”

Section: Introductionmentioning

confidence: 99%

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Thiirane functional spherosilicate as epoxy resin modifier

Dutkiewicz

Szołyga

Maciejewski

et al. 2014

J Therm Anal Calorim

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Epoxy resin-based composites, also those containing POSS compounds, have been the subject of extensive research because of their attractive properties and broad practical applications. However, in some applications they suffer from too long curing times or not strong enough adhesion to metals. A solution to this problem is the use of episulfide (thiirane) derivatives or their combination with epoxies. In this paper, the synthesis of new octakis[(3-(thiiran-2-yloxy)propyl)dimethylsiloxy]octasilesquioxane from its 3-glycidoxypropyldimethylsiloxy analog is described. Results of study of its influence on thermal properties as well as curing processes of modified with this compound epoxy resins hardened with maleic, phthalic, and pyromellitic anhydrides are also presented. It is shown that addition of this new thiirane functional POSS compound can significantly increase thermal stability of obtained epoxy resin composites and decrease its curing temperatures.

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Section: Curing Proceduresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thiirane functional spherosilicate as epoxy resin modifier

Dutkiewicz

Szołyga

Maciejewski

et al. 2014

J Therm Anal Calorim

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show abstract

“…Following this strategy, many attempts have also been made to integrate silica and analogous derivatives (SiO 2 /SiOx) onto the CNT surface in the form of nanobeads, nanorods and nanosheets. 15,16 Concerning the SiOx precursor, we have sought to introduce cube-like octa-organsilsesquioxanes (CSQ, [RSiO 1.5 ] 8 ) that consist of eight Si atoms located at the corners of a cage, interconnected with Si−O−Si linkages forming the edges, to hybrid nanocomposites. [8][9][10] In particular, a SiO 2 /SiOx layer is well-known for its large surface area-to-volume ratio and regular pore structure that can allow for achieving a large uptake of active species.…”

Section: Introductionmentioning

confidence: 99%

Construction and electronic properties of carbon nanotube hybrids with conjugated cubic silsesquioxane

Lin

et al. 2015

New J. Chem.

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We herein reprot a hierarchical hybrid preparaed from zero-dimensional cubic silsesquioxane, octa-aminophenylsilsesquioxane, and one-dimensional single-walled carbon nanotubes (SWNT) through Friedel-Crafts acylation and amidation chemistry.We characterized the electronic structure and morphology of the nanohybrid by FT-IR spectra, Raman spectra, electrochemical analysis and field-emission scanning electron microscope. In addition, High resolution TEM results indicated that their average diameter and diameter distribution remained nearly unchanged with respect to that of the pristine, in accordance with the Raman spectroscopic results. The specific 2 capacitance of abtained hybrid was larger than that of the pristine SWNT due to the hierarchical structure and the charge transfer from both SWNT and octa-aminophenylsilsesquioxane. To further study the electronic properties of conjugated functionalized silsesquioxane, the model compounds with a structure similar to that of the nanohybrid were desighed and characterized by photoluminescence UV-vis analysis and density functional theoretical calculations.The analysis indicated the presence of an electron delocalization effect between the octa-aminophenylsilsesquioxane cores and the conjugated group. Such important electronic properties also assisted in the improvement of the performance for hierarchical hybrid.

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“…Within these concerns, significant progress has been made to develop an active material featuring conjugated polymer and small molecule organic semiconductors [3][4][5]. This is due to the fact that these compounds offer unique properties which consist conjugated molecular unit and excellent electronic behaviours.…”

Section: Introductionmentioning

confidence: 99%

Synthesis, Crystal Structure and Electrical Studies of Naphthoyl-Thiourea as Potential Organic Light Emitting Diode

et al. 2015

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A new type of naphthoyl-thiourea derivative namely N-(5-methylpyridine)-N 0 -(1-naphthoyl) thiourea (NT) was successfully synthesized prior to form conductive layer in organic light emitting diode (OLED). The structure of compound was determined via single crystal X-ray crystallography analysis and spectroscopically characterized by infrared spectroscopy, 1 H and 13 C nuclear magnetic resonance, UV-Vis, UV-fluorescence, cyclic voltammetry analysis as well evaluated theoretically via Gaussian 09 software employing DFT approach with set of basis function B3LYP/6-31G (d,p). In turn, the compound was deposited onto ITO substrate through electrochemical deposition method prior the electrical conductivity and performance as OLED was investigated via Four Point Probe and Two Point Probe. From the crystal structure, NT crystallizes as triclinic crystal system in P-1 space group, unit cell parameters a = 7.4916(5) Å , b = 9.4050(7) Å , c = 12.0584(9) Å , a = 69.685 (7)°, b = 82.130 (6)°and c = 71.917 (7)°. The conductivity analysis of NT performed better and exhibited semiconductor material; 0.231 Scm -1 under dark condition which indicates this single molecular system can act as potential OLEDs.Graphical Abstract This contribution reports on the design, preparation, and characterization of new type of naphthoyl-thiourea derivative namely N-(5-methylpyridine)-N 0 -(1-naphthoyl) thiourea (NT) prior acting as potential Organic Light Emitting Diode (OLED).

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Synthesis, characterization, and OLED application of oligo(p-phenylene ethynylene)s with polyhedral oligomeric silsesquioxanes (POSS) as pendant groups

Cited by 58 publications

References 35 publications

Thiirane functional spherosilicate as epoxy resin modifier

Thiirane functional spherosilicate as epoxy resin modifier

Construction and electronic properties of carbon nanotube hybrids with conjugated cubic silsesquioxane

Synthesis, Crystal Structure and Electrical Studies of Naphthoyl-Thiourea as Potential Organic Light Emitting Diode

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