Schiff base derivative doped chiral nematic liquid crystals with a large wavelength shift driven by temperature and light

Ren, Lei; He, Wanli; Wei, Ming; Luo, Shiguang; Yao, Daipeng; Yang, Zhou; Wang, Dong; Cao, Hui

doi:10.1039/c9tc04609g

Cited by 12 publications

(2 citation statements)

References 37 publications

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“…According to our previous work, the flexible poly(ethylenetere phthalate) (PET) polymer matrix doped with photochromic anil molecules can achieve rapid and reversible photodeformation under the cooperation of intermolecular interactions and photo‐ induced molecular motions, which has been applied to the designable photodeformation as dancing butterflies and switch (Figures 20a—c). [ 130‐132 ] With the application of this strategy to other photochromic molecules, the triphenylethylene with halogen substituents could realize the multi‐photoresponsive properties, including photochromism, photodeformation and room temperature phosphorescence (Figure 20d). [ 133 ] Accordingly, the photoinduced cyclization reaction promoted by bromine substituents is the main reason for photochromism and photodeformation.…”

Section: Opto‐electronic Materials With Multiple Componentsmentioning

confidence: 99%

Molecular Uniting Set Identified Characteristic (MUSIC) of Organic Optoelectronic Material

Huang

2022

Chin. J. Chem.

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Comprehensive Summary Researchers investigated the organic optoelectronic materials and facilitated their development in organic light‐emitting diodes (OLEDs), chemo‐ and biosensors, organic solar cells, data storage, and anticounterfeiting devices. Atoms make up molecules through chemical bonds, and molecular aggregates are formed through weak intermolecular interactions. The opto‐electronic performance of these materials depends on not only the properties of the well‐designed molecules with specific function groups, but also their aggregate states. The molecular aggregates in the form of nanoparticles can be applied in biological imaging, and films can be applied to photovoltaic and photodeformable devices, in which, the alignment of optoelectronic molecules can be either an ordered crystalline or an amorphous state. Generally, the crystalline materials could be deeply investigated by single crystal/powder X‐ray diffraction analysis, which could provide the accurate information about molecular conformations, interactions and packing characteristics. It afforded a convenient way to investigate the possible relationship between molecular aggregates and opto‐electronic properties. Among various opto‐electronic materials, organic room temperature phosphorescence (RTP) materials exhibit the extremely sensitive luminescence property to molecular aggregates, even the dynamic properties can be detected by the tiny change of molecular aggregates. Thus, we selected the organic RTP emission as the output information of molecular aggregates, and afforded typical examples to find the possible relation between RTP effect and molecular packing. Accordingly, molecular packing can be adjusted by the external force as light, mechanical force, temperature, electric field, and so on, as well as the molecular structures as the building blocks, and the systematic investigation in the dynamic and static aggregation structures is of great value to the design of various optoelectronic materials. This review discusses the relationship among molecular structures, aggregation behaviors and corresponding optoelectronic properties by a comprehensive summary of recent research in our group, and the concept of molecular uniting set identified characteristic (MUSIC) is afforded. What is the most favorite and original chemistry developed in your research group? The concept of “Suitable Isolation Group” for molecular design of organic second‐order nonlinear optical (NLO) materials. Molecular packing is highlighted as the key point to opto‐electronic materials, which are partially summarized in this mini review to present “MUSIC” in the molecular world. How do you supervise your students? Discussions. We do discussions for science, interests and other topics related to research together, through which to solve the encountered problems. What is the most important personality for scientific research? Curiosity, desire to advance, persistence, sense of urgency, and team spirit. What are your hobbies? What's your favorite book(s)?? Listening to music...

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Section: Opto‐electronic Materials With Multiple Componentsmentioning

confidence: 99%

Molecular Uniting Set Identified Characteristic (MUSIC) of Organic Optoelectronic Material

Huang

2022

Chin. J. Chem.

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“…The dynamic tuning of CLCs in reflective bands has become a hot topic because of its wider use. In general, common stimulus signals such as heat [8], light [9][10][11] and electric field [12][13][14][15][16] can be used to adjust the central selective wavelength or reflection bandwidth of CLCs. However, relatively speaking, the photo-thermal signal and humidity in the tuning process of LC devices are often accompanied by slow response speeds, low tuning accuracy and other shortcomings.…”

Section: Introductionmentioning

confidence: 99%

Ionic Chiral Ferrocene Doped Cholesteric Liquid Crystal with Electronically Tunable Reflective Bandwidth performance

Zhang

et al. 2022

Materials

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Cholesteric liquid crystals (CLC) were widely used in optical devices as one-dimensional photonic crystals. However, their reflective bands cannot be adjusted, which limits their wide application in many fields. In this paper, a series of ionic chiral ferrocene derivatives (CD-Fc+) as dopants were designed and prepared, and their doping into negative liquid crystal matrix was investigated to develop cholesteric response liquid crystal composites with electrically tunable reflective bands. The effects of electric field frequency, voltage, retention time of voltage and molecular structure on the broadening of reflection bandwidth were investigated in detail.

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Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

Zhang,

Zheng,

2024

Responsive Materials

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For centuries, humans have never stopped exploring the nature of light and manipulating it, since light carries multiple information through its intrinsic wave‐particle dualism, including wavelength, amplitude, phase, polarization, spin/orbital angular momentum, etc., which determines the physical language and basic manners we perceive the objective world. Conventional optical devices, such as lenses, prisms, and lasers, are composed of solid elements that are bulky, making it difficult to manipulate light dynamically with multiple degrees‐of‐freedom. Comparatively, some responsive soft matters, especially represented by liquid crystals (LCs), possess distinctive orientational order and spontaneous self‐assembled superstructures, enabling the digital programming of microstructures and multiple degrees‐of‐freedom manipulation of their optical characteristics. The optical manipulation based on these soft superstructures, that is, the “soft‐matter‐photonics”, is playing an impressive role in integrated functional devices, especially in the present age of information explosion. Herein, we review the latest advances, respectively, in the microstructure configurations, multiple degrees‐of‐freedom manipulations, and the relevant prospective applications. Additionally, scientific issues and technical challenges that hinder the programing operation and optical manipulations are discussed. Toward a four‐dimensional optical manipulation of soft condensed matter, this review may have wide implications on a variety of applications, including the integrated fabrication of compact elements, multi‐channel information processing and high‐capacity optical communications.

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Schiff base derivative doped chiral nematic liquid crystals with a large wavelength shift driven by temperature and light

Abstract: A chiral salicylaldehyde Schiff-base was successfully synthesized and was used to develop responsive chiral liquid crystals with large wavelength shift driven by temperature and UV light irradiation.

Cited by 12 publications

References 37 publications

Molecular Uniting Set Identified Characteristic (MUSIC) of Organic Optoelectronic Material

Molecular Uniting Set Identified Characteristic (MUSIC) of Organic Optoelectronic Material

Ionic Chiral Ferrocene Doped Cholesteric Liquid Crystal with Electronically Tunable Reflective Bandwidth performance

Multiple degrees‐of‐freedom programmable soft‐matter‐photonics: Configuration, manipulation, and advanced applications

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