Authors
Stephen V Arehart, Coleen Pugh
Publication date
1997/4/2
Journal
Journal of the American Chemical Society
Volume
119
Issue
13
Pages
3027-3037
Publisher
American Chemical Society
Description
{5-[[[2‘,5‘-Bis[(4‘‘-(n-(perfluoroalkyl)alkoxy)benzoyl)oxy]benzyl]oxy]carbonyl]bicyclo[2.2.1]hept-2-ene}s were polymerized by ring-opening metathesis polymerization in THF at 40 °C using Mo(CHCMe2Ph)(N-2,6-iPr2Ph)(OtBu)2 as the initiator. 2,5-Bis[(4‘-(n-(perfluoroalkyl)alkoxy)benzoyl)oxy]toluenes mimic both the phases formed by the poly{5-[[[2‘,5‘-bis[(4‘‘-(n-(perfluoroalkyl)alkoxy)benzoyl)oxy]benzyl]oxy]carbonyl]bicyclo[2.2.1]hept-2-ene}s and the general temperatures of their transitions, and are therefore excellent models of the polymers. In contrast to their hydrocarbon analogs which exhibit only nematic mesophases, all of the polymers and their low molar mass model compounds exhibit smectic C and smectic A mesophases. In both cases, all of the transition temperatures decrease with increasing hydrocarbon length and increase with increasing fluorocarbon length.
Total citations
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