Liquid Crystalline Oligofluorenes


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  • Product Description

Monodisperse glassy liquid crystalline conjugated oligomer films are promising for application in optics, photonics and electronics. This research has furnished fundamental understanding of the origin of chiroptical effects in glassy-cholesteric oligofluorene films and new insight into the photoalignment of glassy-nematic oligofluorene films. Specifically, cholesteric films, which emerged upon thermal annealing of spin-cast films of chiral oligofluorenes, showed an order-of-magnitude increase in circular dichroism and a handedness reversal in circularly polarized fluorescence compared to the amorphous pristine films. The oligomer chain length played an important role in solid morphology. The orientation of monodisperse glassy-nematic oligofluorenes was characterized on photoalignment layers comprising a polymethacrylate backbone with coumarin pendants. A transition from a parallel to a perpendicular orientation with reference to the polarization axis of UV-irradiation was observed at a high extent of coumarin dimerization. A kinetic model was used to interpret the photodimerization of coumarin and to evaluate the relative importance of the factors affecting the crossover behavior.

Product Specifications
SKU :COC83370
AuthorAnita Trajkovska
Number of Pages184
Publishing Year2011-09-02T00:00:00.000
Edition1 st
Book TypeAerospace & aviation technology
Country of ManufactureIndia
Product BrandVDM Verlag Dr. Müller
Product Packaging InfoBox
In The Box1 Piece
Product First Available On ClickOnCare.com2015-10-08 00:00:00
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