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Open AccessArticle

4-Azafluorenone and α-Carboline Fluorophores with Green and Violet/Blue Emission

1
Faculty of Natural Sciences, Institute of Chemistry, Comenius University, Ilkovičova 6, Mlynská dolina CH-2, SK-842 15 Bratislava, Slovakia
2
SYNKOLA, Ltd., Ilkovičova 6, 842 15, Bratislava, Slovakia
3
Institute of Electronics and Photonics, Slovak University of Technology, Ilkovičova 3, SK-81219 Bratislava, Slovakia
*
Author to whom correspondence should be addressed.
Molecules 2019, 24(13), 2378; https://doi.org/10.3390/molecules24132378
Received: 5 June 2019 / Revised: 21 June 2019 / Accepted: 26 June 2019 / Published: 27 June 2019
(This article belongs to the Section Photochemistry)
The emission properties of three 4-azafluorenone and five new α-carboline fluorophores in both solution and thin solid films were investigated. Fluorescence of the azafluorenone is clearly enhanced in thin solid films due to the presence of phenyl/biphenyl rotors, and these derivatives can be classified as green Aggregation-Induced Emission luminogens (AIEgens) with a non-emissive heteroaromatic core structure. Compared to azafluorenones, emission of α-carbolines is hypsochromically shifted to the blue region of the electromagnetic spectrum, and most of these derivatives exhibit strong violet-blue fluorescence in both solution and thin solid film layers. Further, the effective mobility and electroluminescence of new α-carbolines were investigated in prepared organic field-effect transistors and organic light-emitting diodes, respectively. View Full-Text
Keywords: 4-azafluorenone; α-carboline; fluorescence; aggregation-induced emission; organic thin films and thin film devices 4-azafluorenone; α-carboline; fluorescence; aggregation-induced emission; organic thin films and thin film devices
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MDPI and ACS Style

Cigáň, M.; Danko, P.; Brath, H.; Čakurda, M.; Fišera, R.; Donovalová, J.; Filo, J.; Weis, M.; Jakabovič, J.; Novota, M.; Gáplovský, A. 4-Azafluorenone and α-Carboline Fluorophores with Green and Violet/Blue Emission. Molecules 2019, 24, 2378.

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