scholarly journals Perylene bisimide hydrogels and lyotropic liquid crystals with temperature-responsive color change

2016 ◽  
Vol 7 (11) ◽  
pp. 6786-6790 ◽  
Author(s):  
Daniel Görl ◽  
Bartolome Soberats ◽  
Stefanie Herbst ◽  
Vladimir Stepanenko ◽  
Frank Würthner
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Color Change ◽  
Temperature Response ◽  
Lyotropic Liquid Crystals ◽  
Social Self ◽  
Perylene Bisimide ◽  
Temperature Responsive ◽  
Lcst Behavior

Tuning of the temperature response of perylene bisimide hydrogels exhibiting LCST behavior has been achieved by social self-assembly in water.

Self-assembly of dendron-helical polypeptide copolymers: organogels and lyotropic liquid crystals

2006 ◽  
pp. 1372 ◽  
Author(s):  
Kyoung Taek Kim ◽  
Chiyoung Park ◽  
Chulhee Kim ◽  
Mitchell A. Winnik ◽  
Ian Manners
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Lyotropic Liquid Crystals

Temperature-responsive proton-conductive liquid crystals formed by the self-assembly of zwitterionic ionic liquids

RSC Advances ◽  
2015 ◽  
Vol 5 (78) ◽  
pp. 63732-63737 ◽  
Author(s):  
Xinpei Gao ◽  
Fei Lu ◽  
Bin Dong ◽  
Tao Zhou ◽  
Yizhi Liu ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Liquid Crystals ◽  
Self Assembly ◽  
Proton Conduction ◽  
Proton Conductors ◽  
The Self ◽  
Conductive Liquid ◽  
Temperature Responsive ◽  
Conduction Behavior

Nanostructured proton conductors having hexagonal and cubic structures were constructed by the self-assembly of zwitterionic ionic liquids. These nanostructured proton conductors all exhibited an assembled-structure dependent proton conduction behavior.

Self-assembly and polymer-stabilization of lyotropic liquid crystals in aqueous and non-aqueous solutions

2017 ◽  
Vol 5 (1) ◽  
pp. 34-52 ◽  
Author(s):  
Dae-Yoon Kim ◽  
Seok-In Lim ◽  
Daseal Jung ◽  
Joo-Kyoung Hwang ◽  
Namil Kim ◽  
...  
Keyword(s):  
Liquid Crystals ◽  
Aqueous Solutions ◽  
Self Assembly ◽  
Lyotropic Liquid Crystals ◽  
Polymer Stabilization

scholarly journals Organic Acid Regulated Self-Assembly and Photophysical Properties of Perylene Bisimide Derivatives

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1656
Author(s):  
Ying Wang ◽  
Xinguo Yang ◽  
Siyu Li ◽  
Tao Long ◽  
Wei Li
Keyword(s):  
Organic Acids ◽  
Organic Acid ◽  
Self Assembly ◽  
Color Change ◽  
Photophysical Properties ◽  
Blue Color ◽  
Perylene Bisimide ◽  
Acid Type ◽  
Visible Spectra ◽  
Uv Visible

In this work, perylene bisimide derivatives (PBI-1 and PBI-2) with tertiary amine groups were designed and synthesized. To control the final morphologies and properties of their aggregates, seven kinds of organic acids were used to alter the self-assembly environment. The influence of organic acids on the morphology of the aggregates was investigated. Photophysical properties of the aggregates were markedly affected by the kind and concentration of the organic acid. The thermal and gas sensitivities of the PBI-1 aggregates were studied with the use of UV–visible spectroscopy and digital imaging. The shift of the UV–visible spectra varied with time, temperature, acid type and acid concentration. Furthermore, PBI-1 aggregates showed a red-to-blue color change after addition of seven organic acids, whereas the color of the PBI-2 aggregates remained red. These changes of morphologies, photophysical properties and their thermal and gas sensitivities make these aggregates potentially useful in the fields of optoelectronics or sensors.

scholarly journals Colloidal Lyotropic Liquid Crystalline Phases of Two-Dimensional Nanoparticles of Layered Hybrid Organic-Inorganic Metal Halide Perovskites

2021 ◽  
Author(s):  
PEI-XI WANG
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Metal Halide ◽  
Lyotropic Liquid Crystals ◽  
Two Dimensional ◽  
Halide Anion ◽  
Crystalline Phases ◽  
Liquid Crystalline Phases ◽  
Halide Perovskites

Lyotropic liquid crystals are fluids with macroscopic anisotropic structures formed by the self-assembly of nonspherically-symmetric mesogenic molecules or nanoparticles. Here, lyotropic liquid crystalline phases with discotic-nematic orderings were observed in colloidal dispersions of hexagonal-shaped nanoplatelets of two-dimensional layered hybrid organic-inorganic metal halide perovskites (with formula A<sub>2</sub>BX<sub>4</sub> where A<sup>1+</sup> is an organic ammonium cation, B<sup>2+</sup> is a divalent metal cation, and X<sup>1-</sup> is a halide anion) synthesized via microcrystallization by mixing precursor solutions with antisolvents containing surfactants, which showed semiconducting properties such as blue to green photoluminescence. As nanocrystalline perovskites are compositionally (transition metals like manganese, copper or europium as octahedral unit centers, mixed halides, organic spacers with chirality, etc.), microscopic structurally (three-, two-, or one-dimensional), and geometrically (nanosheets or nanorods) adjustable, liquid crystals with different phase behaviors and physical features (e.g., paramagnetism) may be systematically developed using this method.<br>

Enhanced energy transfer efficiency and stability of europium β-diketonate complex in ionic liquid-based lyotropic liquid crystals

2015 ◽  
Vol 17 (31) ◽  
pp. 20322-20330 ◽  
Author(s):  
Sijing Yi ◽  
Jiao Wang ◽  
Xiao Chen
Keyword(s):  
Ionic Liquid ◽  
Energy Transfer ◽  
Liquid Crystals ◽  
Hydrogen Bonds ◽  
Self Assembly ◽  
Energy Transfer Efficiency ◽  
Lyotropic Liquid Crystals ◽  
The Self ◽  
Transfer Efficiency ◽  
Imidazolium Cations

The self-assembly of luminescent lyotropic liquid crystals with europium β-diketonate complex confined within via hydrogen bonds between P123 and imidazolium cations is demonstrated.

scholarly journals Colloidal Lyotropic Liquid Crystalline Phases of Two-Dimensional Nanoparticles of Layered Hybrid Organic-Inorganic Metal Halide Perovskites

2021 ◽  
Author(s):  
PEI-XI WANG
Keyword(s):  
Liquid Crystals ◽  
Self Assembly ◽  
Liquid Crystalline ◽  
Metal Halide ◽  
Lyotropic Liquid Crystals ◽  
Two Dimensional ◽  
Halide Anion ◽  
Crystalline Phases ◽  
Liquid Crystalline Phases ◽  
Halide Perovskites

Lyotropic liquid crystals are fluids with macroscopic anisotropic structures formed by the self-assembly of nonspherically-symmetric mesogenic molecules or nanoparticles. Here, lyotropic liquid crystalline phases with discotic-nematic orderings were observed in colloidal dispersions of hexagonal-shaped nanoplatelets of two-dimensional layered hybrid organic-inorganic metal halide perovskites (with formula A<sub>2</sub>BX<sub>4</sub> where A<sup>1+</sup> is an organic ammonium cation, B<sup>2+</sup> is a divalent metal cation, and X<sup>1-</sup> is a halide anion) synthesized via microcrystallization by mixing precursor solutions with antisolvents containing surfactants, which showed semiconducting properties such as blue to green photoluminescence. As nanocrystalline perovskites are compositionally (transition metals like manganese, copper or europium as octahedral unit centers, mixed halides, organic spacers with chirality, etc.), microscopic structurally (three-, two-, or one-dimensional), and geometrically (nanosheets or nanorods) adjustable, liquid crystals with different phase behaviors and physical features (e.g., paramagnetism) may be systematically developed using this method.<br>

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