Ordering the amorphous – Structures in PBD LED materials

Emmerling, Franziska; Orgzall, I.; Dietzel, Birgit; Schulz, Burkhard; Larrucea, Julen

doi:10.1016/j.molstruc.2012.04.040

Cited by 5 publications

(3 citation statements)

References 62 publications

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“…The crystal structure of the CAB-and PBD-functionalized CP 2 (Scheme 1) showed that the torsion angles between the central pentagon and phenyl groups at the 3,4-positions were 53° and 48° respectively due to the steric hindrance (see Figure S8). The corresponding angles for the PBD segment in this CP were 30°, 11° and 14° respectively, which were a little higher than the reported bare PBD single crystal results, namely 26°, 8° and 4° [45]. This suggests that the conjugation of the PBD moiety in the CP is somewhat reduced as compared with PBD.…”

Section: Synthesis and Structural Characterizationcontrasting

confidence: 54%

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

et al. 2016

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Two light-emitting polyphenylene dendrimers with both hole and electron transporting moieties were synthesized and characterized. Both molecules exhibited pure blue emission solely from the pyrene core and efficient surface-to-core energy transfers when characterized in a nonpolar environment. In particular, the carbazole-and oxadiazole-functionalized dendrimer (D1) manifested a pure blue emission from the pyrene core without showing intramolecular charge transfer (ICT) in environments with increasing polarity. On the other hand, the triphenylamine-and oxadiazole-functionalized one (D2) displayed notable ICT with dual emission from both the core and an ICT state in highly polar solvents. D1, in a three-layer organic light emitting diode (OLED) by solution processing gave a pure blue emission with Commission Internationale de l'Éclairage 1931 CIE xy = (0.16, 0.12), a peak current efficiency of 0.21 cd/A and a peak luminance of 2700 cd/m 2 . This represents the first reported pure blue dendrimer emitter with bipolar charge transport and surface-to-core energy transfer in OLEDs.

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Section: Synthesis and Structural Characterizationcontrasting

confidence: 54%

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

et al. 2016

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“…There are no hydrogen bondings; however, there is a weak intermolecular interaction N1…C1. An interesting comparison with the crystal structures of structurally related compounds NAXDIZ , IPODEX , and PEDQUM is presented in Figure . The methyl substituent in 7a causes only slight deviation from planarity, similar to the non‐substituted benzene ring in PEDQUM, but surprisingly not as twisted as in the meta‐substituted IPODEX.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of Extended 1,3,4‐Oxadiazole and 1,3,4‐Thiadiazole Derivatives in the Suzuki Cross‐coupling Reactions

Wróblowska

Kudelko

Kuźnik

et al. 2016

Journal of Heterocyclic Chem

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“…Oxadiazole‐containing polymers and organic small molecules are a topic of interest because of their unique properties arising from the presence of nitrogen‐containing heterocyclic aromatic structure. Polymers containing 1,3,4‐oxadiazole rings present a great interest for high performance materials because of their high thermal stability and certain specific properties that are determined by the nature of oxadiazole unit that has a strong electron‐withdrawing character []. Poly(arylene‐oxadiazole)s give easily redox reactions, chemically or electrochemically, and the resulting materials are good candidates for electrochemical sensors or electroluminescent devices, to be used in optoelectronics, microelectronics, or other advanced fields [].…”

Section: Introductionmentioning

confidence: 99%

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

Damaceanu¹,

Jarząbek

Brumă³

2013

Polym Eng Sci

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Two series of polymers and copolymers containing oxadiazole units have been studied with respect to their photo‐optical and electrochemical behavior. Fluorene units were introduced in the macromolecular chain together with oxadiazole rings in order to obtain a better balance between electrons and holes injection and transporting properties. Upon irradiation with UV light the polymers showed photoluminescence maxima in the blue spectral range. Cyclic voltammetry was performed in order to obtain information about the electrochemical stability and reversibility of the redox processes of these polyoxadiazoles. The highest occupied molecular orbital and lowest unoccupied molecular orbital energy levels, and electrochemical and optical band gap values were calculated by using the results of cyclic voltammetry and UV/vis spectroscopy, respectively, showing very good electron injection and transport characteristics. POLYM. ENG. SCI., 54:1126–1133, 2014. © 2013 Society of Plastics Engineers

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Ordering the amorphous – Structures in PBD LED materials

Cited by 5 publications

References 62 publications

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

Blue Light Emitting Polyphenylene Dendrimers with Bipolar Charge Transport Moieties

Synthesis of Extended 1,3,4‐Oxadiazole and 1,3,4‐Thiadiazole Derivatives in the Suzuki Cross‐coupling Reactions

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

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