scholarly journals Temperaturabhängigkeit der Absorption und Fluoreszenz von Tetracen und Perylen/Tetracen in Flüssigkristallen / The Temperature Dependence of Absorption and Fluorescence of Tetracene and PeryleneI Tetracene in Liquid Crystals

1979 ◽  
Vol 34 (11) ◽  
pp. 1301-1304 ◽  
Author(s):  
G. Ullrich ◽  
A. Schmillen
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystals ◽  
Binary System ◽  
Fluorescence Intensity ◽  
Decay Time ◽  
Wavelength Region ◽  
Fluorescence Decay ◽  
Liquid Crystal Phase ◽  
Clearing Point ◽  
Fluorescence Decay Time

At the clearing point the extinction and the fluorescence intensity of pure tetracene mixtures decrease rapidly. This is explained as due to a forced scattering in the liquid crystal phase. In the binary system perylene/tetracene the polarisation of absorption and emission in the wavelength region of tetracene is inverted and the corresponding fluorescence decay time increases with temperature

Mn4+ non-equivalent doped fluoride phosphor towards a short fluorescence decay time for backlighting

2022 ◽  
Author(s):  
Jie Li ◽  
Xinyi Yang ◽  
Tong Li ◽  
Yan-Qing Ye ◽  
Yayun Zhou ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Fluorescence Lifetime ◽  
Decay Time ◽  
Fluorescence Decay ◽  
Compensation Mechanism ◽  
Exchange Method ◽  
Fluorescence Decay Time ◽  
Ion Exchange Method

The non-equivalent doping of Mn4+ in the red-emitting fluoride phosphors effectively shortens the fluorescence lifetime. Herein, we successfully synthesized Rb2NaInF6:Mn4+ phosphors by an ion-exchange method. The compensation mechanism of Mn4+...

scholarly journals Liquid crystal phase transitions in suspensions of mineral colloids: new life from old roots

2013 ◽  
Vol 371 (1988) ◽  
pp. 20120263 ◽  
Author(s):  
H. N. W. Lekkerkerker ◽  
G. J. Vroege
Keyword(s):  
Phase Transitions ◽  
Liquid Crystal ◽  
Liquid Crystals ◽  
Colloidal Suspensions ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Future Developments ◽  
Mineral Particles ◽  
Crystal Phases ◽  
Liquid Crystal Phases

A review is given of the field of mineral colloidal liquid crystals : liquid crystal phases formed by individual mineral particles within colloidal suspensions. Starting from their discovery in the 1920s, we discuss developments on the levels of both fundamentals and applications. We conclude by highlighting some promising results from recent years, which may point the way towards future developments.

Measurements of the Fluorescence Decay Time in Mixed Solutions Using Pulse Fluorometery

1982 ◽  
Vol 37 (2) ◽  
pp. 197-198
Author(s):  
R. K. Bauer ◽  
R. Twardowski
Keyword(s):  
Malachite Green ◽  
Decay Time ◽  
Rhodamine 6G ◽  
Fluorescence Decay ◽  
Experimental Results ◽  
Mixed Solutions ◽  
Fluorescence Decay Time ◽  
The Mean

Abstract The mean fluorescence decay time for rhodamine 6G (donor) in the presence of malachite green (acceptor) has been investigated using a pulse fluorometer. The experimental results have been compared with theoretical ones obtained earlier [1].

Synthesis and Characterization of Terthiophene-Based Rod-Like Liquid Crystals

2012 ◽  
Vol 532-533 ◽  
pp. 61-65
Author(s):  
Xiao Hui Liu ◽  
Zhong Xiao Li ◽  
Song Ya Zhang ◽  
Jia Ling Pu
Keyword(s):  
Liquid Crystal ◽  
Liquid Crystalline ◽  
Crystal Phase ◽  
Liquid Crystal Phase ◽  
Schiff’S Base ◽  
Thermally Induced ◽  
H Nmr ◽  
Clearing Point ◽  
Temperature Ranges

With 2,2',5',2''-Terthiophene as starting material, two liquid crystalline compounds containing Schiff’s base unit were synthesized in this paper. The structure of the compounds was confirmed by FTIR and 1H NMR. The thermally induced phase transition behaviors were investigated by POM and DSC, and the temperature ranges of liquid crystal phase of the two compounds were compared. Results showed that the symmetric compound exhibited a lower clearing point temperature and broader temperature range of liquid crystal phase.

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