Synthesis and Properties of Light-emitting Liquid Crystals
A special issue of Crystals (ISSN 2073-4352). This special issue belongs to the section "Liquid Crystals".
Deadline for manuscript submissions: closed (1 April 2019)
Special Issue Editor
Interests: organic synthesis; fluorine; liquid crystals; fluorescence; phosphorescence; stimulus-responsive materials
Special Issues, Collections and Topics in MDPI journals
Special Issue Information
Dear Colleagues,
Light-emitting molecules are utilized in daily life, for example, in lighting and optoelectronic devices, as well as sensing materials. To date, most of the developed organic light-emitting molecules only show intense luminescence in dilute solutions. This feature is useful in applications such as fluorescent brightening agents, diagnostic fluorescent markers, and fluorescent indicators. In contrast, because of concentration quenching or aggregation-caused quenching effect, luminescence from organic luminophores is often quenched in the condensed phase, such as the solid state. Since the early 2000s, however, extensive efforts have been devoted to overcome this problem, and various solid-state organic light-emitting molecules that are suitable for use in optoelectronic devices, have been developed.
As one of the condensed phases, liquid-crystalline (LC) phases have attracted enormous attention because a mesophase exists between the crystalline and isotropic liquid phases, and the aggregated structures can be reversibly switched by external stimuli. Currently, applications utilising this switchable LC property are limited to LC display devices, which control the transmittance of the backlight by electric-field stimulation. Owing to the intriguing phase-switching properties of LCs, the discovery of novel liquid-crystalline functional molecules has attracted significant interest in various fields.
Light-emitting liquid crystals possessing both light-emitting and LC properties are promising functional molecules that can switch light-emitting properties by changing their molecular aggregated structures via phase transition, e.g., crystal ⇄ LC ⇄ liquid. This Special Issue, titled “Synthesis and Properties of Light-Emitting Liquid Crystals”, is intended to provide an innovative and broad perspective on light-emitting molecules with liquid-crystalline properties, particularly focusing on molecular design, synthesis, and the light-emitting, as well as liquid-crystalline, properties.
The potential topics include, but are not limited to:
- molecular design of molecules with both light-emitting and liquid-crystalline properties;
- development of efficient synthetic protocols for light-emitting liquid crystals;
- characterisation of the structure, photophysical properties excited by photons or electronic-fields, and liquid-crystalline behavior;
- photoluminescent or electroluminescent properties in liquid-crystalline phases; and
- applications using light-emitting liquid crystals.
Dr. Shigeyuki YAMADA
Guest Editor
Manuscript Submission Information
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Keywords
- light-emitting molecules
- liquid crystal
- photoluminescence
- electroluminescence
- phase transition
- switching property
- stimuli-responsive property
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