Facilitating the formation of the Grandjean texture in thermotropic chiral nematic side-chain copolymers via modulation of backbone flexibility

1991 ◽  
Vol 24 (15) ◽  
pp. 4472-4474 ◽  
Author(s):  
Sushil Krishnamurthy ◽  
Shaw H. Chen
Keyword(s):  
Side Chain ◽  
Backbone Flexibility ◽  
Chiral Nematic

Helical Sense and Twisting Power in Thermotropic Side–Chain Copolymers

1990 ◽  
Vol 214 ◽  
Author(s):  
Sushil Krishnamurthy ◽  
Shaw H. Chen
Keyword(s):  
Molecular Interactions ◽  
Structural Similarity ◽  
Side Chain ◽  
Backbone Flexibility ◽  
Phenylethyl Alcohol ◽  
Chiral Nematic ◽  
Helical Twisting Power

ABSTRACTThermotropic chiral nematic copolymers containing (S)–(–)–1–phenylethyl alcohol and (R)–(–)–methyl mandelate with methacrylate backbone and those containing (S)–(–)–1–phenylethylamine and cholesterol with acrylate/methacrylate mixed backbone structures have been synthesized and characterized. It is found that the helical sense is dictated by chiral/nematic molecular interactions of a steric nature, and that the helical twisting power (HTP) is favored by the structural similarity between the chiral and nematic components. Furthermore, it is shown that HTP can be optimized with a suitable nematogenic comonomer by regulating the backbone flexibility within the acrylate/methacrylate series, which facilitates supramolecular arrangement without affecting the HTP.

scholarly journals Refinement of Protein Docking with Atom-Atom Contact Potentials, Backbone Flexibility and Side-Chain Repacking

2017 ◽  
Vol 112 (3) ◽  
pp. 54a
Author(s):  
Taras Dauzhenka ◽  
Ivan Anishchenko ◽  
Petras J. Kundrotas ◽  
Ilya A. Vakser
Keyword(s):  
Protein Docking ◽  
Side Chain ◽  
Backbone Flexibility

scholarly journals Thermotropic chiral nematic side-chain polymers and cyclic oligomers

1996 ◽  
Vol 21 (6) ◽  
pp. 1211-1233 ◽  
Author(s):  
Shaw H Chen ◽  
Hongqin Shi ◽  
John C Mastrangelo ◽  
Jane J Ou
Keyword(s):  
Side Chain ◽  
Chiral Nematic ◽  
Cyclic Oligomers

scholarly journals A Simple Model of Backbone Flexibility Improves Modeling of Side-chain Conformational Variability

2008 ◽  
Vol 380 (4) ◽  
pp. 757-774 ◽  
Author(s):  
Gregory D. Friedland ◽  
Anthony J. Linares ◽  
Colin A. Smith ◽  
Tanja Kortemme
Keyword(s):  
Simple Model ◽  
Side Chain ◽  
Backbone Flexibility ◽  
Conformational Variability

THE RELAXATION OF TWISTED CHIRAL NEMATIC LIQUID CRYSTALS WITH SIDE-CHAIN POLYMERIC LAYER

2013 ◽  
Vol 27 (22) ◽  
pp. 1350118
Author(s):  
XUAN ZHOU ◽  
ZHIDONG ZHANG
Keyword(s):  
Relaxation Time ◽  
Relative Motion ◽  
Perturbation Analysis ◽  
Dissipation Function ◽  
Side Chain ◽  
Side Chains ◽  
Analysis Method ◽  
Chiral Nematic ◽  
Nematic Director ◽  
Polymeric Layer

A generalized form of surface dissipation function, for the description of the relative motion of the nematic director with respect to the polymer side chains in twisted chiral nematic samples is proposed, and the relaxation time of such samples are investigated, using the perturbation analysis method proposed by Alexe-Ionescu et al. Our results show that the presence of both the surface dissipation and the polymer side chains increase the relaxation time.

ANCHORING OF TWISTED CHIRAL NEMATIC LIQUID CRYSTALS ON A THIN POLYMERIC FILM

2012 ◽  
Vol 26 (10) ◽  
pp. 1250064 ◽  
Author(s):  
XUAN ZHOU ◽  
ZHIDONG ZHANG ◽  
YANJUN ZHANG ◽  
LI XUAN
Keyword(s):  
Liquid Crystals ◽  
Nematic Liquid Crystals ◽  
Side Chain ◽  
Threshold Field ◽  
Side Chains ◽  
Anisotropic Surface ◽  
Chiral Nematic ◽  
Anchoring Energy ◽  
New Variables ◽  
Anisotropic Surface Energy

A generalized form of anisotropic surface energy for the description of twisted chiral nematic samples with side-chain polymeric layers is proposed, and the anchoring properties of such samples are analyzed, using the equivalent anchoring energy method proposed by Alexe-Ionescu et al. Our results give a more general expression for the equivalent anchoring energy, the new variables included in the expression are determined by the anchoring of the side chains and by the sterical interaction of the side chains with the nematic liquid crystals (NLCs). In addition, the coupling of the polymer side chains with the surface, reduces the equivalent anchoring energy as well as the threshold field.

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