Grafting Dendrons onto Pillar[5]Arene Scaffolds

With their ten peripheral substituents, pillar[5]arenes are attractive compact scaffolds for the construction of nanomaterials with a controlled number of functional groups distributed around the macrocyclic core. This review paper is focused on the functionalization of pillar[5]arene derivatives with small dendrons to generate dendrimer-like nanomaterials and bioactive compounds. Examples include non-viral gene vectors, bioactive glycoclusters, and liquid-crystalline materials.

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On resolving fine periodic microstructures in the optical microscope

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153798 ◽

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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Spinodal decomposition in liquid crystalline materials

Journal de Physique II ◽

10.1051/jp2:1991119 ◽

1991 ◽

Vol 1 (8) ◽

pp. 949-958 ◽

Cited By ~ 4

Author(s):

A. Ten Bosch

Keyword(s):

Spinodal Decomposition ◽

Liquid Crystalline ◽

Crystalline Materials ◽

Liquid Crystalline Materials

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Designing Chemically Selective Liquid Crystalline Materials that Respond to Oxidizing Gases

Journal of Materials Chemistry C ◽

10.1039/d1tc00544h ◽

2021 ◽

Author(s):

Nanqi Bao ◽

Jake Gold ◽

Tibor Szilvasi ◽

Huaizhe Yu ◽

Robert Twieg ◽

...

Keyword(s):

Computational Methods ◽

First Principles ◽

Liquid Crystalline ◽

Soft Materials ◽

Crystalline Materials ◽

Liquid Crystalline Materials ◽

Chemically Selective ◽

Kinetics Of

Computational methods can provide first-principles insights into the thermochemistry and kinetics of reactions at interfaces, but this capability has not been widely leveraged to design soft materials that respond selectively...

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