Chemistry of Mesomorphic Compounds.
Abstract
This final report summarizes synthetical efforts in the chemistry of cholesteric liquid crystals and the temperature sensitivity of their visible selective reflection spectra. Eleven homologous series of alkanoates, omega-phenylalkanoates, alkyl carbonates, and S-alkyl thiocarbonates of cholesterol, cholest-5-en-3 beta-thiol, and 5 alpha-cholestan-3 beta-o1 were prepared and their mesomorphic properties investigated. In addition, numerous other derivatives of these and other 3 beta-sterols were synthesized in order to study the influence of various parameters, such as modified 17 beta-side chain, double bonds, and polar substituents on the mesomorphic properties. The research culminated with the discovery that S-cholesteryl 14-phenyltetradecanethioate reflects the spectral range of 420-600 nm within 0.07C and thereby allows the detection of temperature variations of 2 x 0.00002C.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1975
- Accession Number
- ADA023526
Entities
People
- Juergen L. W. Pohlmann
- Phillip R. Boyd
- Wolfgang Elser
Organizations
- United States Army Communications-Electronics Command