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Sanidic Thermotropic Liquid Crystals

Repasky, Paul J
http://orcid.org/0000-0003-1693-3684
http://rave.ohiolink.edu/etdc/view?acc_num=miami1479939220742374

Abstract Details

2016, Doctor of Philosophy, Miami University, Chemistry and Biochemistry.
Liquid Crystals (LCs) have unique optical and physical properties that have been thoroughly investigated in the last century. The calamitic and discotic mesogens, two subclasses of LCs, are widely-known and studied in this field. A lesser-known and understudied class of liquid crystals, the sanidic mesogens, are board-like hybrids that combine properties between calamitics and discotics. This dissertation will focus on the synthesis, characterization and physical behavior of board-like and thermotropic sanidic liquid crystals. A series of alkoxy- and alkyl-substituted dibenzonaphthacene (DBN) liquid crystals were synthesized and their liquid crystal properties were analyzed. These molecules exhibit thermotropic LC phases. The phase behavior of binary alkoxysubstituted DBN mixtures was explored. Certain alkyl-substituted DBN molecules exhibit a novel thermotropic LC phase, namely, the hexatic-B phase (SmBhex). Extending the core of the DBN with the intent of observing LC phases by synthesizing a tetrabenzanthanthrene (TBAA) core with analogous substituents was attempted. The outcomes of those experiments will also be discussed.
Scott Hartley (Advisor)
Richard Taylor (Committee Member)
Dominik Konkolewicz (Committee Member)
David Tierney (Committee Chair)
Jason Berberich (Committee Member)
127 p.
Chemistry; Materials Science; Organic Chemistry; Physical Chemistry
liquid crystals; sanidic; sanidics; LC; LCs; smectic; smectic phases; dibenzonaphthacene; tetrabenzanthanthrene; DBN; TBAA; SmA; SmB; SmC; XRD; POM; biaxial; hexatic; hexatic-B; phase; crystal; liquid

Recommended Citations

Citations

  • Repasky, P. J. (2016). Sanidic Thermotropic Liquid Crystals [Doctoral dissertation, Miami University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=miami1479939220742374

    APA Style (7th edition)

  • Repasky, Paul. Sanidic Thermotropic Liquid Crystals. 2016. Miami University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=miami1479939220742374.

    MLA Style (8th edition)

  • Repasky, Paul. "Sanidic Thermotropic Liquid Crystals." Doctoral dissertation, Miami University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=miami1479939220742374

    Chicago Manual of Style (17th edition)

miami1479939220742374
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© 2016, all rights reserved.
This open access ETD is published by Miami University and OhioLINK.