New cyanopyridone based luminescent liquid crystalline materials: synthesis and characterization

2014 ◽  
Vol 13 (11) ◽  
pp. 1496-1508 ◽  
Author(s):  
Ahipa T. N. ◽  
Airody Vasudeva Adhikari
Keyword(s):  
Liquid Crystalline ◽  
Photophysical Properties ◽  
Synthesis And Characterization ◽  
Materials Synthesis ◽  
Crystalline Materials ◽  
Polar Groups ◽  
Liquid Crystalline Materials

A series of new luminescent mesogens carrying cyanopyridone, triazole, and polar groups were successfully synthesized. Also, their liquid crystalline and photophysical properties were investigated.

scholarly journals Advances in the Supramolecular Chemistry of Tetracoordinate Boron-Containing Organic Molecules into Organogels and Mesogens

2021 ◽  
Vol 9 ◽  
Author(s):  
Sanchita Shah ◽  
Parvati Marandi ◽  
P. P. Neelakandan
Keyword(s):  
Supramolecular Chemistry ◽  
Liquid Crystalline ◽  
Photophysical Properties ◽  
Building Blocks ◽  
Crystalline Materials ◽  
Π Interactions ◽  
Collective Attention ◽  
Non Covalent Interactions ◽  
Liquid Crystalline Materials ◽  
Covalent Interactions

Boron-containing organic compounds are well accepted as a class of compounds having excellent photophysical properties. In addition to the unique photophysical properties, the ease of synthesis and structural robustness make tetracoordinate boron complexes ideal for a variety of applications. While significant light has been thrown on their luminescence properties, there is no collective attention to their supramolecular chemistry. In this mini review, we discuss the progress made in the supramolecular chemistry of these compounds which includes their utility as building blocks for liquid crystalline materials and gels largely driven by various non-covalent interactions like H-bonding, CH-π interactions, BF-π interactions and Van der Waals forces. The organoboron compounds presented here are prepared from easy-to-synthesize chelating units such as imines, diiminates, ketoiminates and diketonates. Moreover, the presence of heteroatoms such as nitrogen, oxygen and sulfur, and the presence of aromatic rings facilitate non-covalent interactions which not only favor their formation but also helps to stabilize the self-assembled structures.

Characterization of the first mixed-valent liquid-crystalline materials. Synthesis and structural properties of new binuclear ruthenium carboxylates

1991 ◽  
Vol 9 (6) ◽  
pp. 903-906 ◽  
Author(s):  
Fabio D. Cukiernik ◽  
Pascale Maldivi ◽  
Anne-Marie Giroud-godquin ◽  
Jean-Claude Marchon ◽  
Mohammed Ibn-elhaj ◽  
...  
Keyword(s):  
Structural Properties ◽  
Liquid Crystalline ◽  
Materials Synthesis ◽  
Crystalline Materials ◽  
Liquid Crystalline Materials

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.

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