Electroluminescence from two new ruthenium(II) complexes as phosphorescent dopant: Positive effect of swallow-tail bipyridyl ligand

Öner, Ilker; Şahın, Çiğdem; Varlıklı, Canan

doi:10.1016/j.dyepig.2012.02.017

Cited by 19 publications

(11 citation statements)

References 48 publications

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“…This route is followed for the determination of highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) levels of organic semiconductors as well [30][31][32]. The equations used in calculating the I p and E a values are as follows:…”

Section: Optical and Electrochemical Studiesmentioning

confidence: 99%

Efficiency enhancement in a single emission layer yellow organic light emitting device: Contribution of CIS/ZnS quantum dot

et al. 2015

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Section: Optical and Electrochemical Studiesmentioning

confidence: 99%

Efficiency enhancement in a single emission layer yellow organic light emitting device: Contribution of CIS/ZnS quantum dot

et al. 2015

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“…Due to presence of double bond chain conjugation its have potential application blue emitting fluorescence fluorescent dyes with high florescence quantum yield [4,5] and photonics materials such as optical switching, electrochemical sensing, langmuir films and photoinitiated polymerization [6][7][8]. Therefore quinoline derivatives have widely been used as whitening or brightening reagents for synthetic fibers, for recognition of hole-transport materials in the electroluminescence fields [9,10]. Bifungsional group conation quinoline derivatives dramatically increase the blue emitting fluorescence fluorescent dyes and also increase the optical properties [11,12].…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis, Spectroscopic and Physicochemical Studies of Quinoline Based Blue Emitting Donor—Acceptor Chromophores with Their Biological Application

2015

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Blue emitting cyano substituted isoquinoline dyes were synthesized by one-pot multicomponent reactions (MCRs) of aldehydes, malononitrile, 6-methoxy-1,2,3,4-tetrahydro-naphthalin-1-one and ammonium acetate. Results obtained from spectroscopic (FT-IR, (1)H-NMR, (13)C-NMR, EI-MS) and elemental analysis of synthesized compounds was in good agreement with their chemical structures. UV-vis and fluorescence spectroscopy measurements proved that all compounds are good absorbent and fluorescent. Fluorescence polarity study demonstrated that these compounds were sensitive to the polarity of the microenvironment provided by different solvents. In addition, spectroscopic and physicochemical parameters, including electronic absorption, excitation coefficient, stokes shift, oscillator strength, transition dipole moment and fluorescence quantum yield were investigated in order to explore the analytical potential of synthesized compounds. The anti-bacterial activity of these compounds were first studied in vitro by the disk diffusion assay against two Gram-positive and two Gram-negative bacteria then the minimum inhibitory concentration (MIC) was determined with the reference of standard drug chloramphenicol. The results displayed that compound 3 was better inhibitors of both types of the bacteria (Gram-positive and Gram-negative) than chloramphenicol. Graphical Abstract ᅟ.

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“…One of the most studied classes of ruthenium(II) complexes are polypyridine complexes [11][12][13][14][15]. In these species, strong emission in ambient temperature solutions is attributed to 3 MLCT states, but the photophysics and photochemistry of cationic polypyridine complexes depend also on the accessibility of short lived (s = 5 -20 ns or less) 3 MC states [1]. However, the coordination environments of this metal based on the precursor complex [RuHCl(CO)(PPh 3 ) 3 ] have been little described with respect to their photophysical and photochemical properties.…”

Section: Introductionmentioning

confidence: 99%

“…However, the coordination environments of this metal based on the precursor complex [RuHCl(CO)(PPh 3 ) 3 ] have been little described with respect to their photophysical and photochemical properties. Phosphine complexes of ruthenium(II) based on [RuHCl(CO)(PPh 3 ) 3 ] have recently been studied as effective and selective catalysts in organic synthesis, but are much less known as luminophores.…”

Section: Introductionmentioning

confidence: 99%

“…Luminescent ruthenium(II) complexes are of interest of due to their applications in photochemical molecular devices (PMD) such as OLED devices, dye-sensitized solar cells (DSSC), photosensitizers in artificial photosynthesis, sensors, DNA dynamic probes, lipid probes and fluorescence polarization immunoassays (FPI) [1][2][3][4][5][6][7][8][9][10][11]. Recent descriptions of the photochemistry of coordination compounds of ruthenium(II) indicate that they can fulfill many of the functions necessary for these devices [1].…”

Section: Introductionmentioning

confidence: 99%

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Spectroscopic characterization of chloride and pseudohalide ruthenium(II) complexes with 4-(4-nitrobenzyl)pyridine

Maroń

Małecki

2014

Transition Met Chem

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Chloride, isocyanate and isothiocyanate hydride carbonyl ruthenium(II) complexes of 4-(4-nitrobenzyl)pyridine were synthesized from the precursor complex [RuHCl(CO)(PPh 3 ) 3 ] and characterized by IR, NMR, UV-Vis spectroscopy and X-ray crystallography. The electronic structures of the complexes were investigated by means of DFT calculations, based on their crystal structures. The spinallowed singlet-singlet electronic transitions of the complexes were calculated by time-dependent DFT, and the UVVis spectra are discussed on this basis. The emission properties of the complexes were studied at ambient temperature, and the quantum yields of fluorescence, the lifetimes and nature of the excited states are discussed. The chloride and isothiocyanate complexes are practically nonemissive, with quantum yields under 0.01 %. Interpretation of spectra, supported by TD-DFT calculations, indicates that in this energy region, the transitions have MLCT character with admixture of LLCT (chloride and isothiocyanate complexes). The dominant LLCT character was visible in the case of the most emissive (isocyanate) complex. The low values of the lifetimes and quantum yields for these complexes indicate the influence of the metal center in the emission process.

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Electroluminescence from two new ruthenium(II) complexes as phosphorescent dopant: Positive effect of swallow-tail bipyridyl ligand

Cited by 19 publications

References 48 publications

Efficiency enhancement in a single emission layer yellow organic light emitting device: Contribution of CIS/ZnS quantum dot

Efficiency enhancement in a single emission layer yellow organic light emitting device: Contribution of CIS/ZnS quantum dot

One-Pot Synthesis, Spectroscopic and Physicochemical Studies of Quinoline Based Blue Emitting Donor—Acceptor Chromophores with Their Biological Application

Spectroscopic characterization of chloride and pseudohalide ruthenium(II) complexes with 4-(4-nitrobenzyl)pyridine

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