Optical rotatory power of co-ordination compounds. Part IX. The effect of ring conformation on the circular dichroism of cobalt(III) diamine complexes

1968 ◽  
pp. 1304 ◽  
Author(s):  
A. J. McCaffery ◽  
S. F. Mason ◽  
B. J. Norman ◽  
A. M. Sargeson
Keyword(s):  
Circular Dichroism ◽  
Rotatory Power ◽  
Optical Rotatory ◽  
Ring Conformation ◽  
Circular Dichroïsm ◽  
Optical Rotatory Power

scholarly journals Notizen: Helixinversion in einem binären Mischsystem nematisch/cholesterisch/Helical Inversion of a Binary System of a Nematic and a Cholesteric Mesophase

1973 ◽  
Vol 28 (5) ◽  
pp. 799-800
Author(s):  
H. Finkelmann ◽  
H. Stegemeyer
Keyword(s):  
Circular Dichroism ◽  
Liquid Crystal ◽  
Binary System ◽  
Cholesteric Liquid Crystal ◽  
Rotatory Power ◽  
Optical Rotatory ◽  
Circular Dichroïsm ◽  
Helical Twisting Power ◽  
Optical Rotatory Power

In a binary system of a nematic and a cholesteric liquid crystal an inversion of the helix - sense has been observed at a definite composition xn by measurements of circular dichroism and optical rotatory power. The inversion is accompanied by a decrease of the helical twisting power approaching zero at xn .

Doppelte Helixinversion in einem binären System cholesteriseher Komponenten mit Reehtshelix / Twojolcl Helical Inversion in a Binary System of Cholesterics with Right-handed Helix

1973 ◽  
Vol 28 (6) ◽  
pp. 1046-1047 ◽  
Author(s):  
H. Finkelmann ◽  
H. Stegemeyer
Keyword(s):  
Circular Dichroism ◽  
Liquid Crystals ◽  
Binary System ◽  
Rotatory Power ◽  
Optical Rotatory ◽  
Cholesteric Liquid Crystals ◽  
Left Handed ◽  
Circular Dichroïsm ◽  
Optical Rotatory Power

In a binary system of cholesteric liquid crystals with righthanded sense of helix a twofold helical inversion at two different molar fractions ϰn,1 and ϰn, 2 has been observed by measurements of circular dichroism and optical rotatory power. In the region of composition between ϰn,1 and ϰn, 2 all mixtures exhibit a left-handed cholesteric structure.

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