Dielectric properties of a strongly polar nematic liquid crystal compound doped with gold nanoparticles

Mishra, Ramanuj; Hazarika, J.; Hazarika, Ankita; Gogoi, B.; Dubey, Rajeev K.; Bhattacharjee, Debanjan; Singh, Keisham Nanao; Alapati, P. R.

doi:10.1080/02678292.2018.1478995

Cited by 31 publications

(12 citation statements)

References 65 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Consequently, this affects the transition phase temperature, kind of mesophase and other physical and geometrical parameters essential for better characteristics of the LC materials. [38][39][40][41] The Schiff base moiety maintains the rigidity as well as the linearity of the molecular geometry, which enhances the mesomorphic stability. More reports of low molecular mass Schiff base systems and twist bend nematic mesophases have been investigated.…”

Section: Introductionmentioning

confidence: 99%

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

et al. 2021

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Generally, as the breadth of the molecule is increased, the thermal transitions of formed mesophases will be reduced [ 22 ]. In such cases, the inclusion of a compact polar lateral group to the main skeleton of the molecule influences the physical properties of the resulting LC material, such as the melting point, phase transition temperatures, morphology, dielectric anisotropy and dipole moment [ 23 , 24 , 25 , 26 ]. The small volume of lateral substituent enables its attachment into the mesomorphic shape of the molecule without being sterically disrupted, and accordingly, the LC mesophases can still be observed.…”

Section: Introductionmentioning

confidence: 99%

Optical and Thermal Investigations of New Schiff Base/Ester Systems in Pure and Mixed States

et al. 2021

View full text Add to dashboard Cite

New mesomorphic series, 4-hexadecyloxy phenyl-imino-4′-(3-methoxyphenyl)-4″-alkoxybenzoates (An), were prepared and investigated with different thermal and mesomorphic techniques. The synthesized homologous series constitutes four members that differ from each other in the terminal length of flexible chain (n) attached to phenyl ester moiety, which varies between n = 6, 8, 10, and 12 carbons. A lateral CH3O group is attached to the central benzene ring in the meta position with respect to the ester moiety. Molecular structures of all newly prepared homologues were elucidated via FT-IR, 1H and 13C NMR spectroscopy. Mesomorphic and thermal properties were examined by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA) and the mesophases identified by polarized optical microscopy (POM). DSC and POM examinations revealed that all members of the present series (An) exhibit a purely enantiotropic nematic (N) phase. Comparative evaluations and binary phase diagrams were established between the present homologues and their corresponding shorter one (Bn). The examination revealed that, the length of the flexible alkoxy chain incorporated into the phenylimino moiety is highly effective on the temperature range and stability of the mesophase observed. With respect to the binary mixtures An/Bn, the exhibited N phase showed to cover the whole composition range with eutectic behavior.

show abstract

“…Insertion of the F-atom, as a lateral group, offers new mesomorphic behavior for the investigated LC derivatives [ 45 , 46 , 47 , 48 ] which is mainly dependent on the position and orientation of the F-atom. The high polarity and small volume of the F-atom enables it to enhance the mesomorphic and geometrical properties of the prepared LC compound such as its melting point, mesophase transitions, dipole moments, and dielectric anisotropy [ 49 , 50 , 51 , 52 ].…”

Section: Introductionmentioning

confidence: 99%

Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives

et al. 2021

View full text Add to dashboard Cite

A new series of laterally fluorinated mesomorphic compounds, namely 2-fluoro-4-((4-(alkyloxy)phenyl)diazenyl)phenyl 4-substitutedbenzoate (Inx) were prepared and evaluated for their mesophase behavior. The synthesized series constitutes five members that possess different terminally attached polar groups (X). Their molecular structures were confirmed by elemental analyses and both FT-IR and NMR spectroscopy. Examination of the prepared derivatives was conducted via experimental and theoretical tools. Mesomorphic investigations were carried by polarized optical microscopy (POM) and differential scanning calorimetry (DSC). DSC and POM measurements indicated that except for the un-substituted analogue, all other derivatives were purely nematogenic, possessing their nematic (N) mesophase enantiotropically. This is to say that insertions of terminal polar substituents on their mesogenic structures induced the N phase. In addition, the location of lateral and terminal polar moieties played a considerable role in achieving good thermal N stability. Computational calculations were investigated to determine the deduced optimized molecular structures. Theoretical data indicated that both size and polarity of the terminal substituent (X) have essential impact on the thermal parameters and optical properties of possible geometries.

show abstract

Dielectric properties of a strongly polar nematic liquid crystal compound doped with gold nanoparticles

Cited by 31 publications

References 65 publications

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

Novel sulphonic acid liquid crystal derivatives: experimental, computational and optoelectrical characterizations

Optical and Thermal Investigations of New Schiff Base/Ester Systems in Pure and Mixed States

Induced Nematic Phase of New Synthesized Laterally Fluorinated Azo/Ester Derivatives

Contact Info

Product

Resources

About