Near-Infrared Responsive Liquid Crystalline Elastomers Containing Photothermal Conjugated Polymers

2016 ◽  
Vol 49 (11) ◽  
pp. 4023-4030 ◽  
Author(s):  
Wei Liu ◽  
Ling-Xiang Guo ◽  
Bao-Ping Lin ◽  
Xue-Qin Zhang ◽  
Ying Sun ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Liquid Crystalline ◽  
Near Infrared

scholarly journals High-Efficiency Responsive Smart Windows Fabricated by Carbon Nanotubes Modified by Liquid Crystalline Polymers

Crystals ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 440
Author(s):  
Yuan Deng ◽  
Shi-Qin Li ◽  
Qian Yang ◽  
Zhi-Wang Luo ◽  
He-Lou Xie
Keyword(s):  
Carbon Nanotubes ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
High Efficiency ◽  
Polymer Brush ◽  
Light Transmittance ◽  
Smart Window ◽  
Vertical Orientation ◽  
Smart Windows ◽  
Conversion Materials

Smart windows can dynamically and adaptively adjust the light transmittance in non-energy or low-energy ways to maintain a comfortable ambient temperature, which are conducive to efficient use of energy. This work proposes a liquid crystal (LC) smart window with highly efficient near-infrared (NIR) response using carbon nanotubes grafted by biphenyl LC polymer brush (CNT-PDB) as the orientation layer. The resultant CNT-PDB polymer brush can provide the vertical orientation of LC molecules to maintain the initial transparency. At the same time, the smart window shows a rapid response to NIR light, which can quickly adjust the light transmittance to prevent sunlight from entering the room. Different from common doping systems, this method avoids the problem of poor compatibility between the LC host and photothermal conversion materials, which is beneficial for improving the durability of the device.

Low-Band gap Conjugated Polymers with Strong Absorption in the Second Near-Infrared Region Based on Diketopyrrolopyrrole-Containing Quinoidal Units

2021 ◽  
Author(s):  
Xuxia Zhao ◽  
Houji Cai ◽  
Yunfeng Deng ◽  
Yu Jiang ◽  
Zhongli Wang ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Band Gap ◽  
Near Infrared ◽  
Infrared Region ◽  
Strong Absorption ◽  
Low Band Gap ◽  
Near Infrared Region

scholarly journals New Approach in the Application of Conjugated Polymers: The Light-Activated Source of Versatile Singlet Oxygen Molecule

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1098
Author(s):  
Agata Blacha-Grzechnik
Keyword(s):  
Conjugated Polymers ◽  
Singlet Oxygen ◽  
Near Infrared ◽  
Photophysical Properties ◽  
Short Review ◽  
The Novel ◽  
New Approach ◽  
Intermolecular Energy ◽  
Intermolecular Energy Transfer ◽  
High Absorption

For many years, the research on conjugated polymers (CPs) has been mainly focused on their application in organic electronics. Recent works, however, show that due to the unique optical and photophysical properties of CPs, such as high absorption in UV–Vis or even near-infrared (NIR) region and efficient intra-/intermolecular energy transfer, which can be relatively easily optimized, CPs can be considered as an effective light-activated source of versatile and highly reactive singlet oxygen for medical or catalytic use. The aim of this short review is to present the novel possibilities that lie dormant in those exceptional polymers with the extended system of π-conjugated bonds.

Charge mobility in discotic liquid crystalline porphyrins and phthalocyanines measured by PR-TRMC

2003 ◽  
Vol 07 (05) ◽  
pp. 342-350 ◽  
Author(s):  
John M. Warman ◽  
Jessica E. Kroeze ◽  
Pieter G. Schouten ◽  
Anick M. van de Craats
Keyword(s):  
Conjugated Polymers ◽  
Carrier Mobility ◽  
Liquid Crystalline ◽  
Alkyl Chain ◽  
Charge Carrier Mobility ◽  
Chain Structure ◽  
Coupling Element ◽  
Time Resolved ◽  
Liquid Crystalline Phases ◽  
Conductive Properties

The pulse-radiolysis time-resolved microwave conductivity technique, “PR-TRMC”, has been used to determine the charge carrier mobility within columnar stacks of mesomorphic discotic porphyrins and phthalocyanines. The influences of temperature, morphology and variations in the primary molecular structure are demonstrated and discussed. Both the mesomorphic and conductive properties are shown to be dramatically influenced by subtle changes in the peripheral alkyl chain structure or the core-to-chain coupling element. Mobilities close to 1 cm2.V−1.s−1 are found in crystalline solids, and well in excess of 0.1 cm2.V−1.s−1 in columnar, liquid crystalline phases. These values which are even larger than those determined by PR-TRMC for conjugated polymers and similar to values found for electrons and holes in organic single crystals.

Near-infrared-emissive π-conjugated polymers based on five-coordinated silicon formazanate complexes

Polymer ◽  
2021 ◽  
pp. 124463
Author(s):  
Shunichiro Ito ◽  
Yoshinori Ito ◽  
Tanaka Kazuo ◽  
Yoshiki Chujo
Keyword(s):  
Conjugated Polymers ◽  
Near Infrared

Morphology and charge recombination effects on the performance of near-infrared photodetectors based on conjugated polymers

2019 ◽  
Vol 64 ◽  
pp. 274-279 ◽  
Author(s):  
Dae Woon Lee ◽  
Yeongkwon Kang ◽  
Bong Hyun Jo ◽  
Gyeong G. Jeon ◽  
Jaehong Park ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Near Infrared ◽  
Charge Recombination ◽  
Infrared Photodetectors

scholarly journals Synthesis, Mesomorphism and the Optical Properties of Alkyl-deuterated Nematogenic 4-[(2,6-difluorophenyl)ethynyl]biphenyls

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4653
Author(s):  
Jakub Herman ◽  
Piotr Harmata ◽  
Michał Czerwiński ◽  
Olga Strzeżysz ◽  
Marta Pytlarczyk ◽  
...  
Keyword(s):  
Molecular Structure ◽  
Mass Spectrometry ◽  
Differential Scanning Calorimetry ◽  
Optical Properties ◽  
Liquid Crystalline ◽  
Near Infrared ◽  
Synthesis And Characterization ◽  
Molecular Approach ◽  
Scanning Calorimetry

The synthesis and characterization of new deuterated liquid crystal (LC) compounds based on phenyl tolane core is described in this paper. The work presents an alternative molecular approach to the conventional LC design. Correlations between molecular structure and mesomorphic and optical properties for compounds which are alkyl-hydrogen terminated and alkyl-deuterium, have been drawn. The compounds are characterized by mass spectrometry (electron ionization) analysis and infrared spectroscopy. They show enantiotropic nematic behavior in a broad temperature range, confirmed by a polarizing thermomicroscopy and differential scanning calorimetry. Detailed synthetic procedures are attached. Synthesized compounds show a significantly reduced absorption in the near-infrared (NIR) and medium-wavelength infrared (MWIR) radiation range, and stand as promising components of medium to highly birefringent liquid crystalline mixtures.

Thermotropic liquid crystalline conjugated polymers, poly(cyclohexylphenoxyacetylenes)-synthesis and properties

1995 ◽  
Vol 71 (1-3) ◽  
pp. 1899-1900 ◽  
Author(s):  
H. Goto ◽  
K. Akagi ◽  
H. Shirakawa ◽  
S.-Y. Oh ◽  
K. Araya
Keyword(s):  
Conjugated Polymers ◽  
Liquid Crystalline

Liquid Crystalline Conjugated Polymers – Synthesis and Properties

2007 ◽  
pp. 249-275 ◽  
Author(s):  
Kazuo Akagi
Keyword(s):  
Conjugated Polymers ◽  
Liquid Crystalline
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