Binary systems with induced smectic phases due to EDA complex formation

1987 ◽  
Vol 22 (8) ◽  
pp. K125-K128 ◽  
Author(s):  
G. Pelzl ◽  
M. Novak ◽  
W. Weissflog ◽  
D. Demus
Keyword(s):  
Complex Formation ◽  
Binary Systems ◽  
Smectic Phases ◽  
Eda Complex ◽  
Induced Smectic Phases

Induced smectic phases

1978 ◽  
Vol 3 ◽  
pp. 403-407 ◽  
Author(s):  
B. Engelen ◽  
G. Heppke ◽  
R. Hopf ◽  
F. Schneider
Keyword(s):  
Smectic Phases ◽  
Induced Smectic Phases

Induced Smectic Phases II. Influence of the Amino Substituent on the Induction of Smectic Phases

1981 ◽  
Vol 36 (10) ◽  
pp. 1086-1091 ◽  
Author(s):  
F. Schneider ◽  
N. K. Sharma
Keyword(s):  
Liquid Crystal ◽  
Electron Donor ◽  
Amino Group ◽  
Donor Property ◽  
Smectic Phases ◽  
Ct Complexes ◽  
Induced Smectic Phases

The diagrams of state have been studied for some liquid crystal mixtures which show the induction of smectic phases. Each of the systems studied contains one component with an amino group which influences the polarity and the electron donor property of the molecules. The discussion of the diagrams of state, of the thickness of the smectic layers and of the colours of the mixtures, which indicate the formation of CT complexes, shows that existing models can not explain the induction of smectic phases.

Induced Smectic Phases I. Polymorphism in Binary Mixtures of Alkyloxybenzylidene-alkylanilines with Alkyl- and Alkyloxy- cyanobiphenyls

1981 ◽  
Vol 36 (1) ◽  
pp. 62-67 ◽  
Author(s):  
F. Schneider ◽  
N. K. Sharma
Keyword(s):  
Chain Length ◽  
Binary Mixtures ◽  
Transition Temperatures ◽  
Mean Values ◽  
Smectic Phases ◽  
The Mean ◽  
Induced Smectic Phases

The diagrams of state of mixtures of 4-n-alkyloxybenzylidene-4'-n-butylanilines with 4-n- alkyl- and 4-n-alkyloxy-4'-cyanobiphenyls are studied. The mixtures form induced smectic phases of type SA, SB and SE. In all three smectic phases the thickness of the smectic layers agrees with the mean values of the molecular lengths. In most cases the induced SA phases do not show uninterrupted miscibility with the SA phases of the pure components. For instance, the system 40 • 4/8 CBP exhibits three separate SA phase areas. The maximum transition temperatures of the induced smectic phases increase with increasing chain length of the azomethines, but remain constant in case of the SA and SB phases or even decrease in case of the SE phases with increasing chain length of the cyanobiphenyls

Induced smectic phases of stoichiometric liquid crystal mixtures

Soft Matter ◽  
2016 ◽  
Vol 12 (12) ◽  
pp. 3103-3109 ◽  
Author(s):  
Shin-ya Sugisawa ◽  
Yuka Tabe
Keyword(s):  
Liquid Crystal ◽  
Smectic Phases ◽  
Induced Smectic Phases

Examination of the inert solvent assumption in the ideal associated solution model. Enthalpy of chloroform–triethylamine complex dissociation

1989 ◽  
Vol 67 (7) ◽  
pp. 1153-1157 ◽  
Author(s):  
John F. Smith ◽  
Loren G. Hepler
Keyword(s):  
Complex Formation ◽  
Binary Mixtures ◽  
Excellent Agreement ◽  
Binary Systems ◽  
Solution Model ◽  
Ideal Associated Solution Model ◽  
Inert Solvent ◽  
Associated Solution Model ◽  
Associated Solution ◽  
The Ideal

We have made new measurements of the enthalpies of adding cyclohexane to mixtures of chloroform + triethylamine + cyclohexane at 25 °C. The results of these measurements have been analysed in terms of the ideal associated solution model to obtain ΔHθ for the dissociation of the chloroform-triethylamine complex. Our value of ΔHθ is in excellent agreement with a published value that was obtained from results of measurements on binary mixtures of chloroform + triethylamine. This agreement indicates that it is usefully accurate to treat mixtures of chloroform + triethylamine + cyclohexane as ideal mixtures of chloroform, triethylamine, cyclohexane, and chloroform-triethylamine complex. This result has important implications for studies of associated systems dissolved in "inert" solvents and helps to provide a connection between complex formation in dilute solutions and in binary systems (A + B, no solvent). Keywords: ideal associated solution model, chloroform, triethylamine, inert solvent, hydrogen bonded complex.

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