Exciplex formation with distyrylbenzene derivatives and N,N-dimethylaniline

Wang, Shujun; Bazan, Guillermo C.

doi:10.1016/s0009-2614(00)01375-0

Cited by 18 publications

(12 citation statements)

References 24 publications

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“…Such exciplexes have previously been reported for a number of polymer-polymer combinations. [22][23][24] The exciplex emission of the MDMO-PPV: PCNEPV blend can also be observed when the polymer layer is embedded in a device structure with a PEDOT: PSS bottom contact and a LiF/ Al top contact ͑see Sec. II͒.…”

Section: Methodsmentioning

confidence: 99%

“…In heterojunctions of polymer-polymer blends redshifted emission has been observed and attributed to an exciplex state. [22][23][24] Efficient red-emitting LEDs can be made based on exciplex emission from mixtures of donor and acceptor polymers. 22,23 Here we investigate the photophysical processes associated with the exciplex in a MDMO-PPV: PCNEPV bulk heterojunction device.…”

Section: Introductionmentioning

confidence: 99%

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Exciplex dynamics in a blend ofπ-conjugated polymers with electron donating and accepting properties: MDMO-PPV and PCNEPV

et al. 2005

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Exciplex dynamics in a blend ofπ-conjugated polymers with electron donating and accepting properties: MDMO-PPV and PCNEPV

et al. 2005

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“…[15] The orange-emitting regions probably have interchromophore arrangements that favor excimer-type interactions. [12,16,17] Figure 8 shows the green emission from the annealed film of T-6R-OC 8 H 17 . There is no variation in intensity and no emission is observed upon irradiation at 540 nm.…”

Section: Morphologymentioning

confidence: 99%

A Tetrahedral Oligo(phenylenevinylene) Molecule of Intermediate Dimensions: Effect of Molecular Shape on the Morphology and Electroluminescence of Organic Glasses

et al. 2001

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Tetrakis[(4‐(4′‐(2″,5″‐dioctyloxy‐4″‐(4‴‐(2′‴,5′‴‐dioctyloxy‐4′‴‐styryl)styryl)styryl)styryl)styryl)phenyl]methane (T‐6R‐OC8H17) is an organic chromophore that consists of four optoelectronic fragments (“arms”) connected to a tetrahedral point of convergence (carbon). Bulk samples are amorphous as determined by powder diffraction, while differential scanning calorimetry (DSC) is sometimes ambiguous. Film forming properties were studied by atomic force microscopy (AFM) and fluorescence microscopy as a function of casting solvent and heat treatment. The film forming qualities are useful for the fabrication of light‐emitting diodes with low turn‐on voltages. Device performance is also history dependent. The relationship between bulk morphology, film topology, photoluminescence (PL) properties, and light‐emitting diode (LED) performance is discussed. A comparison of these compounds against the parent oligo(phenylenevinylene) arms, with respect to morphology, topology, and PL properties is also presented.

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“…The shift of the emission attributed to the OPV scaffold is rationalized by the change in the local environment from OPV to anthracene neighbors in the disordered g(Col ob ) phase or the helical columnar phase (Figure C). A possible exciplex formation in such structures is known to be disfavored for OPV scaffolds with extended conjugation . Interestingly, the transformation to the soft crystalline phase is accompanied with a hypsochromic shift of the fluorescence maximum to 507 nm, that is, almost to a position of the maximum of the neat host 2 and a broadening of the band.…”

Section: Methodsmentioning

confidence: 99%

“…Ap ossible exciplex formation in such structures is knowntobedisfavored for OPV scaffolds with extended conjugation. [22] Interestingly,t he transformation to the soft crystalline phase is accompanied with ah ypsochromic shift of the fluorescencem aximum to 507 nm, that is, almost to ap osition of the maximum of the neat host 2 and ab roadening of the band. These resultst ogether with the observation of two sets of signals in the solid-state NMR and the hydrogen bonds of the FT-IR studies imply that in the soft crystalline state the OPV scaffold and the anthracenec hromophore are nanosegregated as shown in Figure4C( right).…”

Section: N8mentioning

confidence: 99%

A Star‐shaped Oligo(phenylenevinylene) Liquid Crystal Host with an Anthracene Guest—A Double Nanosegregating Supermesogen

Maier

Grüne

Lehmann

2016

Chemistry A European J

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Hexasubstituted C -symmetric benzenes with three elongated shape-persistent oligo(phenylenevinylene) arms and three pyridyl hydrogen-bond acceptors have been synthesized. These mesogens assemble in a double-helical columnar liquid crystal (LC) structure, owing to the compensation of free spaces between conjugated arms by dimer formation. The void is filled also by up to three anthracene carboxylic acids as guests forming hydrogen bonded supermesogens assembling in columnar LC and soft-crystal phases. Thin film fluorescence and solid-state NMR spectroscopy imply a transition from a disordered columnar LC to an unexpected double nanosegregated morphology of a filled soft columnar crystal phase. An additional intracolumnar separation of anthracene and oligo(phenylenevinylene) chromophores occurs, separate to the general segregation of aliphatic and aromatic building blocks in LC structures. The new type of supermesogens will enable the rational design of host-guest double cables with a wide range of different conjugated building blocks.

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Exciplex formation with distyrylbenzene derivatives and N,N-dimethylaniline

Cited by 18 publications

References 24 publications

Exciplex dynamics in a blend ofπ-conjugated polymers with electron donating and accepting properties: MDMO-PPV and PCNEPV

Exciplex dynamics in a blend ofπ-conjugated polymers with electron donating and accepting properties: MDMO-PPV and PCNEPV

A Tetrahedral Oligo(phenylenevinylene) Molecule of Intermediate Dimensions: Effect of Molecular Shape on the Morphology and Electroluminescence of Organic Glasses

A Star‐shaped Oligo(phenylenevinylene) Liquid Crystal Host with an Anthracene Guest—A Double Nanosegregating Supermesogen

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