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Liquid Crystals Volume 30, 2003 - Issue 12
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Original Articles

Ambient temperature thermotropic liquid crystalline viologen bis(triflimide) salts

Pradip K. Bhowmik Corresponding author Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454 003, Las Vegas, Nevada 89154-4003, USA
,
Haesook Han Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454 003, Las Vegas, Nevada 89154-4003, USA
,
James J. Cebe Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454 003, Las Vegas, Nevada 89154-4003, USA
,
Ronald A. Burchett Department of Chemistry, University of Nevada Las Vegas, 4505 Maryland Parkway, Box 454 003, Las Vegas, Nevada 89154-4003, USA
,
Bharat Acharya Department of Physics, Kent State University, Kent, Ohio 44 242, USA
&
Satyendra Kumar Department of Physics, Kent State University, Kent, Ohio 44 242, USA
Pages 1433-1440 | Received 13 Jun 2003, Accepted 25 Jul 2003, Published online: 07 Jul 2010
 
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Abstract

Two dicationic salts with bis(triflimide) as counterions exhibited crystal-to-smectic liquid crystalline phase transitions (T m=41 and 37°C) and smectic-to-isotropic liquid phase transitions (T i=112, 136°C). They had a broad liquid crystalline phase range (71–99°C) and an excellent range of thermal stability (360–364°C). Their mixtures of various compositions also displayed liquid crystalline properties from r.t. to an extended range of temperatures. They exhibited fluorescence in 1, 2-dimethoxyethane and methanol.

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