Synthesis and characterization of new liquid crystallines containing a mono-aza styrylated indolinobenzospiropyran. Part 6

Keum, Sam‐Rok; Ahn, Su-Mi; Lee, Sung-Hoon

doi:10.1016/s0143-7208(03)00138-4

Cited by 10 publications

(3 citation statements)

References 12 publications

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“…Keum et al have synthesized and studied the LC phase behavior of various spiropyran-based materials 11 − 13 (Scheme ). , These compounds were found to exhibit the metastable monotropic nematic LC phase as studied by DSC and POM.…”

Section: Photochromic Liquid Crystalsmentioning

confidence: 99%

Light-Driven Liquid Crystalline Materials: From Photo-Induced Phase Transitions and Property Modulations to Applications

2016

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Light-driven phenomena both in living systems and nonliving materials have enabled truly fascinating and incredible dynamic architectures with terrific forms and functions. Recently, liquid crystalline materials endowed with photoresponsive capability have emerged as enticing systems. In this Review, we focus on the developments of light-driven liquid crystalline materials containing photochromic components over the past decade. Design and synthesis of photochromic liquid crystals (LCs), photoinduced phase transitions in LC, and photoalignment and photoorientation of LCs have been covered. Photomodulation of pitch, polarization, lattice constant and handedness inversion of chiral LCs is discussed. Light-driven phenomena and properties of liquid crystalline polymers, elastomers, and networks have also been analyzed. The applications of photoinduced phase transitions, photoalignment, photomodulation of chiral LCs, and photomobile polymers have been highlighted wherever appropriate. The combination of photochromism, liquid crystallinity, and fabrication techniques has enabled some fascinating functional materials which can be driven by ultraviolet, visible, and infrared light irradiation. Nanoscale particles have been incorporated to widen and diversify the scope of the light-driven liquid crystalline materials. The developed materials possess huge potential for applications in optics, photonics, adaptive materials, nanotechnology, etc. The challenges and opportunities in this area are discussed at the end of the Review.

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Section: Photochromic Liquid Crystalsmentioning

confidence: 99%

Light-Driven Liquid Crystalline Materials: From Photo-Induced Phase Transitions and Property Modulations to Applications

2016

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“…Photochromic moieties-contained LC mesogens have been synthesized, which could yield light-stimulated phase transition behaviors. [176][177][178][179][180] Typical photochromic moieties include spiropyran, [181] spirooxazine, [182] fulgimide, [183] etc. Alternatively, another design of light-controlled LCs is to introduce photochromic compounds as dopants into the LC systems to regulate the self-assembly of the host.…”

Section: Photo Responsivenessmentioning

confidence: 99%

Liquid Crystal Materials for Biomedical Applications

et al. 2023

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Liquid crystal is a state of matter being intermediate between solid and liquid. Liquid crystal materials exhibit both orientational order and fluidity. While liquid crystals have long been highly recognized in the display industry, in recent decades, liquid crystals provide new opportunities into the cross‐field of material science and biomedicine due to their biocompatibility, multifunctionality, and responsiveness. In this review, the latest achievements of liquid crystal materials applied in biomedical fields are summarized. The start is made by introducing the basic concepts of liquid crystals, and then shifting to the components of liquid crystals as well as functional materials derived therefrom. After that, the ongoing and foreseeable applications of liquid crystal materials in the biomedical field with emphasis put on several cutting‐edge aspects, including drug delivery, bioimaging, tissue engineering, implantable devices, biosensing, and wearable devices are discussed. It is hoped that this review will stimulate ingenious ideas for the future generation of liquid crystal‐based drug development, artificial implants, disease diagnosis, health status monitoring, and beyond.

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“…This behavior is designated as a normal photochromism. [5][6][7] The rate of these reactions depends on the reaction media (i.e., solvent polarity by stabilization/ destabilization of the zwitterionic MC form in polar/ nonpolar solvents). Stabilization of the zwitterionic MC form in polar solvents leads to a larger activation energy and a slower MC→SP transition compared to non-polar solvents.…”

Section: Introductionmentioning

confidence: 99%

Facile Evaluation of Thermodynamic Parameters for Reverse Thermochromism of Indolinobenzospiropyran-6-carboxylates in Aqueous Binary Solvents

Keum¹,

Ma²,

Lim³

et al. 2012

Bulletin of the Korean Chemical Society

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The position of the thermodynamic equilibrium for reverse thermochromic spiropyran 6-carboxylates (SPCOOHs) was easily determined in aqueous binary mixtures, such as water-methanol, water-acetonitrile and water-dimethyl sulfoxide. The existence of more than one type of interconvertible species of the ring-opened form of SP-COOH in aqueous binary solvents enables us to evaluate the molar extinction coefficients of the ring-opened species of SP-COOH and to obtain the thermodynamic parameters.

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Synthesis and characterization of new liquid crystallines containing a mono-aza styrylated indolinobenzospiropyran. Part 6

Cited by 10 publications

References 12 publications

Light-Driven Liquid Crystalline Materials: From Photo-Induced Phase Transitions and Property Modulations to Applications

Light-Driven Liquid Crystalline Materials: From Photo-Induced Phase Transitions and Property Modulations to Applications

Liquid Crystal Materials for Biomedical Applications

Facile Evaluation of Thermodynamic Parameters for Reverse Thermochromism of Indolinobenzospiropyran-6-carboxylates in Aqueous Binary Solvents

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