Fluorescent columnar liquid crystalline 3,4,9,10-tetra-(n-alkoxycarbonyl)-perylenes

Benning, Stephan A.; Kitzerow, Heinz‐S.; Böck, Harald; Achard, M. F.

doi:10.1080/02678290050043842

Cited by 105 publications

(76 citation statements)

References 23 publications

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“…Bock, Kitzerow et al fanden, dass sogar Perylentetracarbonsäuretetraethylester (59 a) eine columnare Mesophase bildet, die über einen Bereich von 70 K stabil ist. [141] Die Orientierung von 59 a in der Mesophase stimmt sehr gut mit der Packung im Kristall überein.…”

Section: Perylenderivateunclassified

Diskotische Flüssigkristalle: Von der maßgeschneiderten Synthese zur Kunststoffelektronik

et al. 2007

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Die meisten Menschen verbinden mit dem Begriff Flüssigkristalle sofort die Displays von Laptop‐Computern, Mobiltelefonen, Digitalkameras und anderen elektronischen Geräten. Im Unterschied zu ihren stäbchenförmigen (calamitischen) Verwandten, die erstmals 1907 von Vorländer beschrieben wurden, bieten aber die 1977 von Chandrasekhar entdeckten scheibenförmigen (diskotischen) Flüssigkristalle andere vielversprechende Verwendungsmöglichkeiten. Ihre einzigartige Anordnung in columnaren Mesophasen macht sie zu idealen Kandidaten für molekulare Drähte in vielen optischen und elektronischen Geräten, beispielsweise in Photokopierern, Laserdruckern, Solarzellen, organischen Leuchtdioden und Feldeffekttransistoren oder zur holographischen Datenspeicherung. Einer Übersicht über die verschiedenen Mesophasentypen und Charakterisierungsmethoden columnarer Flüssigkristalle folgen ausgewählte Beispiele aus den Hauptklassen columnarer Mesogene unter besonderer Berücksichtigung effizienter Syntheseverfahren, mesomorpher Eigenschaften und der für Anwendungen relevanten physikalischen Eigenschaften der Flüssigkristalle. Abschließend werden Anwendungsbeispiele und Perspektiven für einen Einsatz in den Materialwissenschaften und der molekularen Elektronik vorgestellt.

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Section: Perylenderivateunclassified

Diskotische Flüssigkristalle: Von der maßgeschneiderten Synthese zur Kunststoffelektronik

et al. 2007

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“…A shape of the band depends on the length of the alkyl In our previous papers [8][9][10]14,15] we reported about the fluorescence spectra of LB films formed of dyes 2-6, pure and mixed with two liquid crystals, and supposed that the main emitters in LB films are excimers, which originate from interaction of neighbouring molecules after one is excited. Benning et al [2] have found that the maximum of the excimer fluorescence band of 3,4,9,10-tetra-(n-alkoxy--carbonyl)-perylenes in the crystalline state appears at 582-600 nm (depending on the alkyl chain length). However, in LB films of perylene and its derivatives two types of emission were observed, Y-emission, which originates from partially relaxed excited molecular pairs (excimer precursors) [12,13,22] and E-emission, connected with the existence of genuine excimers [12,13].…”

Section: Spectroscopic Studies Of Perylene-derivatives/aa Mixtures Inmentioning

confidence: 99%

“…Because liquid crystals possess the ability to self-organize spontaneously into highly ordered structures, luminescent compounds with liquid crystalline properties are the subject of intensive research in the field of molecular electronics. It was found that some homologues of 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes are able to form a columnar hexagonal liquid crystalline phase over a certain temperature range [2], which in connection with their excellent fluorescent properties [2][3][4] gives opportunity to use these dyes as an active layer in OLEDs. One of the possibilities to obtain active layers is utilization of Langmuir-Blodgett technique, which offers a unique method for fabricating ultrathin ordered layers [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Hertmanowski

Martyński

Stolarski

et al. 2008

Opto-Electronics Review

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Langmuir-Blodgett (LB) films formed of some discotic liquid crystals, namely 3,4,9,10-tetra-(n-alkoxy-carbonyl)-perylenes, mixed with arachid acid have been studied. The absorption and fluorescence spectra were recorded. The results obtained have led to conclusions about formation of self-aggregates of dye molecules both in ground and excited states at the air-solid substrate interface. It was found that some fraction of J-aggregates can be created in the ground state. In the excited state, mostly excimers appear and the number of this kind of aggregates depends on the length of the alkyl chains substituted to the perylene core, as well as on the dye concentration and the number of layers in LB films.

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“…These polymers are required to be uniform and smooth amorphous films without exhibiting pinholes and to be thermally stable without crystallizing [119]. These diodes use two electrodes between which one or more semiconducting organic layers with either fluorescence or phosphorescence capability are placed [120]. The advantages of using, for example, polymer-attached dyes instead of inorganic LEDs are the low costs of production, their good processability and their high chemical and electrical stability.…”

Section: Electrochemical and Optoelectronic Applicationsmentioning

confidence: 99%

Polymers and Dyes: Developments and Applications

2015

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Amongst functional macromolecules, the combination of polymers and dyes is a research field of great potential with regard to high-performance materials. Accordingly, colored polymers have become increasingly important as materials for miscellaneous technical applications in recent years while also being a major part of everyday life. For instance, dye-containing polymers are nowadays widely applied in medicine, painting industries, analytics and gas separation processes. Since these applications are obviously connected to the dye's nature, which is incorporated into the corresponding polymers, the affinity of certain polymers to dyes is exploited in wastewater work-ups after (textile) dyeing procedures. In this review, we wish to point out the great importance of dye-containing polymers, with a comprehensive scope and a focus on azo, triphenylmethane, indigoid, perylene and anthraquinone dyes. Since a large number of synthetic approaches towards the preparation of such materials can be found in the literature, an elaborated overview of different preparation techniques is given as well.

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Fluorescent columnar liquid crystalline 3,4,9,10-tetra-(n-alkoxycarbonyl)-perylenes

Cited by 105 publications

References 23 publications

Diskotische Flüssigkristalle: Von der maßgeschneiderten Synthese zur Kunststoffelektronik

Diskotische Flüssigkristalle: Von der maßgeschneiderten Synthese zur Kunststoffelektronik

Intermolecular interactions in Langmuir-Blodget films of liquid crystalline perylene derivatives

Polymers and Dyes: Developments and Applications

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