Thermally bandwidth-controllable reflective liquid crystal film from rupture and self-assembly of hydrogen bonds

AbstractWe report a new method of Thin Crystal Film deposition. In the present paper we describe the method of crystallization, structure, and optical properties of Bisbenzimidazo[2,1-a:1',2',b']anthra[2,1,9-def:6,5,10-d'e'f']-diisoquinoline-6,9-dion (mixture with cis-isomer) (abbreviated DBI PTCA) sulfonation product. The Thin Crystal Film has a thickness of 200-1000 nm, with anisotropic optical properties such as refraction and absorption indices. X-ray diffraction data evidences a lyotropic liquid crystalline state in liquid phase and crystalline state in solid film. Anisotropic optical properties of the film make it useful in optical devices, e.g. liquid crystal displays.

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Reversible microscale assembly of nanoparticles driven by the phase transition of a thermotropic liquid crystal

10.26434/chemrxiv.5691169 ◽

2017 ◽

Author(s):

Niamh Mac Fhionnlaoich ◽

Stephen Schrettl ◽

Nicholas B. Tito ◽

Ye Yang ◽

Malavika Nair ◽

...

Keyword(s):

Phase Transition ◽

Liquid Crystal ◽

Self Assembly ◽

Nematic Phase ◽

Hierarchical Control ◽

Building Blocks ◽

Model System ◽

Microscopic Level ◽

Reversible Process ◽

Thermotropic Liquid Crystal

The arrangement of nanoscale building blocks into patterns with microscale periodicity is challenging to achieve via self-assembly processes. Here, we report on the phase transition-driven collective assembly of gold nanoparticles in a thermotropic liquid crystal. A temperature-induced transition from the isotropic to the nematic phase leads to the assembly of individual nanometre-sized particles into arrays of micrometre-sized aggregates, whose size and characteristic spacing can be tuned by varying the cooling rate. This fully reversible process offers hierarchical control over structural order on the molecular, nanoscopic, and microscopic level and is an interesting model system for the programmable patterning of nanocomposites with access to micrometre-sized periodicities.

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Orientational self-assembly of nanoparticles in nematic droplets

Nanoscale Advances ◽

10.1039/d1na00089f ◽

2021 ◽

Author(s):

Natália Tomašovičová ◽

Marianna Batkova ◽

Ivan Batko ◽

Veronika Lacková ◽

Vlasta Zavišová ◽

...

Keyword(s):

Liquid Crystal ◽

Self Assembly

The interplay between the anchoring of liquid crystal (LC) molecules at the substrate and at the surface of nanoparticles (NPs) results in an orientational self-assembly of nanoparticles in sessile nematic droplets.

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Development of reverse dispersion liquid crystal film to improve “halo” of high‐dynamic‐range LCDs

Journal of the Society for Information Display ◽

10.1002/jsid.1016 ◽

2021 ◽

Author(s):

Tatsuya Iwasaki ◽

Yuki Nakamura ◽

Toshikazu Sumi ◽

Katsufumi Ohmuro ◽

Masaaki Suzuki ◽

...

Keyword(s):

Liquid Crystal ◽

Dynamic Range ◽

High Dynamic Range ◽

Crystal Film ◽

High Dynamic

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1,2,3-Triazole lamellar liquid crystal and its non-covalent palladium complex dimer: structure, mesomorphism and self-assembly properties

Liquid Crystals ◽

10.1080/02678292.2021.1944358 ◽

2021 ◽

pp. 1-13

Author(s):

Meihao Xia ◽

Yao Chen ◽

Ziran Chen ◽

Wenhao Yu ◽

Haomin Cheng ◽

...

Keyword(s):

Liquid Crystal ◽

Self Assembly ◽

Palladium Complex ◽

Lamellar Liquid Crystal ◽

Dimer Structure

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47‐5: Distinguished Paper: Development of Reversed‐Dispersion Liquid‐Crystal Film to Improve the Display Quality of HDR‐IPS Panels

SID Symposium Digest of Technical Papers ◽

10.1002/sdtp.14766 ◽

2021 ◽

Vol 52 (1) ◽

pp. 650-653

Author(s):

Tatsuya Iwasaki ◽

Yuki Nakamura ◽

Toshikazu Sumi ◽

Katsufumi Ohmuro ◽

Masaaki Suzuki ◽

...

Keyword(s):

Liquid Crystal ◽

Crystal Film ◽

Display Quality

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Taming nitroformate through encapsulation with nitrogen-rich hydrogen-bonded organic frameworks

Nature Communications ◽

10.1038/s41467-021-22475-8 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Jichuan Zhang ◽

Yongan Feng ◽

Richard J. Staples ◽

Jiaheng Zhang ◽

Jean’ne M. Shreeve

Keyword(s):

Thermal Stability ◽

Hydrogen Bonds ◽

Self Assembly ◽

Energetic Materials ◽

Decomposition Temperature ◽

High Oxygen Content ◽

The Poor ◽

Simple Preparation ◽

First Time ◽

Hydrogen Bonded

AbstractOwing to its simple preparation and high oxygen content, nitroformate [−C(NO2)3, NF] is an extremely attractive oxidant component for propellants and explosives. However, the poor thermostability of NF-based derivatives has been an unconquerable barrier for more than 150 years, thus hindering its application. In this study, the first example of a nitrogen-rich hydrogen-bonded organic framework (HOF-NF) is designed and constructed through self-assembly in energetic materials, in which NF anions are trapped in pores of the resulting framework via the dual force of ionic and hydrogen bonds from the strengthened framework. These factors lead to the decomposition temperature of the resulting HOF-NF moiety being 200 °C, which exceeds the challenge of thermal stability over 180 °C for the first time among NF-based compounds. A large number of NF-based compounds with high stabilities and excellent properties can be designed and synthesized on the basis of this work.

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