Abstract
Luminescent liquid crystal materials (LLCMs) have been a hot research topic in the field of fluorescent materials. In this study, we successfully designed and synthesized an intense fluorescence thermotropic liquid crystal material with a fluorescence quantum yield (Φ) of 0.26 in the solid state. Moreover, the alkyl chain attached to the terminus of the chromophore was able to promote the stability of electrochemical and thermal properties, which was beneficial to the device fabrication reproducibility and stability of the device performance.
Highlights
Liquid crystal materials (LCMs) have drawn significant attention due to their wide applications in organic optoelectronic devices, such as optical information displays and storage devices [1,2,3].most of the liquid crystal materials investigated are not fluorescent materials and limit the application of liquid crystal displays
Much research has been devoted to the design and synthesis of new florescent materials that can emit intense fluorescence in the solid state, such as a series of solid-state emissive organic molecules developed by
To evaluate the compound energy levels experimentally, we investigated their electrochemical properties using cyclic voltammetry (CV) and differential pulse voltammetry (DPV) with ferrocene used as an internal standard
Summary
Liquid crystal materials (LCMs) have drawn significant attention due to their wide applications in organic optoelectronic devices, such as optical information displays and storage devices [1,2,3]. Molecules with such types of structure generally have a strong tendency to form π–π stacking in the solid state, resulting in luminescence quenching caused by the dipole-dipole interactions from the donor and acceptor segments; most of the red-emitting materials are susceptible to concentration quenching and become either weakly luminescent or even not emissive at all in the condensed state [20] In this case, the development of red-emitting materials with high fluorescence efficiency (Φ) and liquid crystal properties is highly desired, to the best of our knowledge, only a few examples of LCMs that emit a red light have been reported [16,17,18]. The attached flexible aliphatic hexyl chains provided the molecules with smectic liquid crystal features upon heating
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