Design of Chemoresponsive Liquid Crystals through Integration of Computational Chemistry and Experimental Studies
Journal Article
·
· Chemistry of Materials
- Univ. of Wisconsin, Madison, WI (United States); DOE OSTI
- Univ. of Wisconsin, Madison, WI (United States)
- Kent State Univ., Kent, OH (United States)
We report the use of computational chemistry methods to design a chemically responsive liquid crystal (LC). Specifically, we used electronic structure calculations to model the binding of nitrile-containing mesogens (4'-n-pentyl-4-biphenylcarbonitrile) to metal perchlorate salts (with explicit description of the perchlorate anion), which we call the coordinately saturated anion model (CSAM). The model results were validated against experimental data. We then used the CSAM to predict that selective fluorination can reduce the strength of binding of nitrile-containing nematic LCs to metal-salt-decorated surfaces and thus generate a faster reordering of the LC in response to competitive binding of dimethylmethylphosphonate (DMMP). We tested this prediction via synthesis of fluorinated compounds 3-fluoro-4'-pentyl[1,1'-biphenyl]-4-carbonitrile and 4-fluoro-4'-pentyl-1,1'-biphenyl, and subsequent experimental measurements of the orientational response of LCs containing these compounds to DMMP. In conclusion, these experimental measurements confirmed the theoretical predictions, thus providing the first demonstration of a chemoresponsive LC system designed from computational chemistry.
- Research Organization:
- Kent State Univ., Kent, OH (United States); Univ. of Wisconsin, Madison, WI (United States)
- Sponsoring Organization:
- National Science Foundation (NSF); USDOE Office of Science (SC), Biological and Environmental Research (BER)
- Grant/Contract Number:
- AC02-05CH11231; AC02-06CH11357
- OSTI ID:
- 1418546
- Journal Information:
- Chemistry of Materials, Journal Name: Chemistry of Materials Journal Issue: 8 Vol. 29; ISSN 0897-4756
- Publisher:
- American Chemical Society (ACS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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