scholarly journals Visualized Polymers. Patterns Formed by Polymeric Systems. II. Side Chain Ferroelectric Liquid Crystalline Conjugated Polymers: Textures under Polarizing Optical Microscope.

1999 ◽  
Vol 56 (12) ◽  
pp. 797-806 ◽  
Author(s):  
X.M. DAI ◽  
H. GOTO ◽  
K. AKAGI ◽  
H. SHIRAKAWA
Keyword(s):  
Conjugated Polymers ◽  
Liquid Crystalline ◽  
Optical Microscope ◽  
Side Chain ◽  
Polymeric Systems

Intertwined Lamello-Columnar Coassemblies in Liquid-Crystalline Side-Chain Π-Conjugated Polymers: Toward a New Class of Nanostructured Supramolecular Organic Semiconductors

2014 ◽  
Vol 47 (5) ◽  
pp. 1715-1731 ◽  
Author(s):  
Danli Zeng ◽  
Ibtissam Tahar-Djebbar ◽  
Yiming Xiao ◽  
Farid Kameche ◽  
Navaphun Kayunkid ◽  
...  
Keyword(s):  
Conjugated Polymers ◽  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Side Chain ◽  
New Class

Processable Thiophene Copolymer With A Chiral Amino Acid Side Chain

1995 ◽  
Vol 413 ◽  
Author(s):  
Srinivasan Balasubramanian ◽  
Kethinni G. Chittibabu ◽  
Jayant Kumar ◽  
Sukant K. Tripathy
Keyword(s):  
Amino Acid ◽  
Conjugated Polymers ◽  
Molecular Electronics ◽  
Optical Rotatory Dispersion ◽  
Side Chain ◽  
Amino Acid Side Chain ◽  
Optical Rotatory ◽  
Polymeric Systems ◽  
Photorefractive Materials ◽  
Uv Visible

ABSTRACTConjugated polymers in general, and polythiophenes in particular have been attracting attention in the field of molecular electronics. Polythiophenes functionalized at the β- position with various groups have resulted in processable, conjugated polymeric systems with applications such as organic electrodes, photorefractive materials, electro-luminescent devices, among others. We report the synthesis of a thiophene copolymer with alkyl and chiral amino acid substituents at the β- position. We have synthesized a solution processable poly[3-octylthiophene-co-(N-1-carboxyl, 2- (4-hydroxy-3-nitrophenyl)ethyl)-3-thiophene acetamide] with 3-nitro-L-Tyrosine as the chiral amino acid side chain. The UV-Visible and optical rotatory dispersion spectra of the new copolymer are discussed.

Side-chain liquid crystalline conjugated polymers, poly (mono-substituted acetylenes)

1994 ◽  
pp. 259-262 ◽  
Author(s):  
K. Akagi ◽  
S.-Y. Oh ◽  
H. Goto ◽  
Y. Kadokura ◽  
H. Shirakawa
Keyword(s):  
Conjugated Polymers ◽  
Liquid Crystalline ◽  
Side Chain ◽  
Substituted Acetylenes

On resolving fine periodic microstructures in the optical microscope

1989 ◽  
Vol 47 ◽  
pp. 364-365
Author(s):  
W.S. Putnam ◽  
C. Viney
Keyword(s):  
Liquid Crystalline ◽  
Numerical Aperture ◽  
Polarized Light ◽  
Normal Incidence ◽  
Optical Microscope ◽  
Angle Of Incidence ◽  
Resolution Limit ◽  
Crystalline Materials ◽  
Periodic Microstructures ◽  
Liquid Crystalline Materials

Many sheared liquid crystalline materials (fibers, films and moldings) exhibit a fine banded microstructure when observed in the polarized light microscope. In some cases, for example Kevlar® fiber, the periodicity is close to the resolution limit of even the highest numerical aperture objectives. The periodic microstructure reflects a non-uniform alignment of the constituent molecules, and consequently is an indication that the mechanical properties will be less than optimal. Thus it is necessary to obtain quality micrographs for characterization, which in turn requires that fine detail should contribute significantly to image formation.It is textbook knowledge that the resolution achievable with a given microscope objective (numerical aperture NA) and a given wavelength of light (λ) increases as the angle of incidence of light at the specimen surface is increased. Stated in terms of the Abbe resolution criterion, resolution improves from λ/NA to λ/2NA with increasing departure from normal incidence.

Discotic columnar liquid-crystalline polymer semiconducting materials with high charge-carrier mobility via rational macromolecular engineering

2017 ◽  
Vol 8 (21) ◽  
pp. 3286-3293 ◽  
Author(s):  
Bin Mu ◽  
Xingtian Hao ◽  
Jian Chen ◽  
Qian Li ◽  
Chunxiu Zhang ◽  
...  
Keyword(s):  
Liquid Crystalline ◽  
Cost Effective ◽  
Crystalline Polymer ◽  
Charge Carrier Mobility ◽  
Optoelectronic Device ◽  
Side Chain ◽  
Liquid Crystal Polymers ◽  
Semiconducting Materials ◽  
Organic Semiconducting Materials ◽  
Device Applications

Well-prepared side-chain discotic liquid crystal polymers with shorter spacers in ordered columnar phases are fascinating and promising cost-effective, solution-processable organic semiconducting materials for various potential optoelectronic device applications.

New side-chain liquid crystalline terpolymers with anhydrous conductivity: effect of azobenzene substitution on light response and charge transfer

2021 ◽  
pp. 110246
Author(s):  
Sakinah Mohd Alauddin ◽  
A. Ramadan Ibrahim ◽  
Nurul Fadhilah Kamalul Aripin ◽  
Thamil Selvi Velayutham ◽  
Osama K. Abou-Zied ◽  
...  
Keyword(s):  
Charge Transfer ◽  
Liquid Crystalline ◽  
Light Response ◽  
Side Chain

scholarly journals A Highly Versatile Polymer Network Based on Liquid Crystalline Dendrimers

2021 ◽  
Vol 22 (11) ◽  
pp. 5740
Author(s):  
Ramón Cervera-Procas ◽  
José-Luis Serrano ◽  
Ana Omenat
Keyword(s):  
Smart Materials ◽  
Liquid Crystalline ◽  
Organic Dyes ◽  
Polymer Network ◽  
Viscoelastic Behavior ◽  
Diverse Range ◽  
Polymeric Systems ◽  
System A ◽  
Porous Microstructure ◽  
Solvent Molecules

Highly functional macromolecules with a well-defined architecture are the key to designing efficient and smart materials, and these polymeric systems can be tailored for specific applications in a diverse range of fields. Herein, the formation of a new liquid crystalline polymeric network based on the crosslinking of dendrimeric entities by the CuI-catalyzed variant of the Huisgen 1,3-dipolar cycloaddition of azides and alkynes to afford 1,2,3-triazoles is reported. The polymeric material obtained in this way is easy to process and exhibits a variety of properties, which include mesomorphism, viscoelastic behavior, and thermal contraction. The porous microstructure of the polymer network determines its capability to absorb solvent molecules and to encapsulate small molecules, like organic dyes, which can be released easily afterwards. Moreover, all these properties may be easily tuned by modifying the chemical structure of the constituent dendrimers, which makes this system a very interesting one for a number of applications.

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.

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