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26.4: Invited Paper: Preparation and Spectral quality of Naphthalene Derivatives Dichroic Liquid Crystal Dyes
Author(s) -
LI Xiaolian,
Pan Rouchen,
Wang Zhaofen
Publication year - 2019
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1002/sdtp.13463
Subject(s) - fluorescence , dichroic glass , liquid crystal , naphthalene , melting point , chemistry , analytical chemistry (journal) , absorption (acoustics) , ultraviolet , crystal (programming language) , photochemistry , absorption spectroscopy , mass spectrometry , materials science , organic chemistry , chromatography , optics , nanotechnology , optoelectronics , physics , computer science , composite material , programming language
A series of new dyes based on 4‐bromo‐1, 8‐naphthaliminde had been designed, synthesized and evaluated. Spectroscopic tests of those compounds exhibited that these dyes emitted yellow‐green fluorescence at 490‐520 nm and had high quantum yields 0.76. Those dyes suggested positive fluorescent dichroism, when dispersed in LC E7, SA and S F which were up to 0.51, 0.41, respectively. The dye and LC E7 were mixtured and then did the photoelectric test. Mass spectrometry, NMR and melting point were characterized. Ultraviolet and fluorescence spectra were tested in the isotropic solvents, and the absorption and emission spectra in the anisotropic liquid crystal.