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Design of Chemoresponsive Liquid Crystals through Integration of Computational Chemistry and Experimental Studies

Journal Article · · Chemistry of Materials

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:
Univ. of Wisconsin, Madison, WI (United States); Kent State Univ., Kent, OH (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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Computational Chemistry-Guided Design of Selective Chemoresponsive Liquid Crystals Using Pyridine and Pyrimidine Functional Groups journal January 2018
Liquid Crystals with Interfacial Ordering that Enhances Responsiveness to Chemical Targets journal May 2018
Redox-Triggered Orientational Responses of Liquid Crystals to Chlorine Gas journal July 2018
Redox-Triggered Orientational Responses of Liquid Crystals to Chlorine Gas journal July 2018
Multi-Scale Responses of Liquid Crystals Triggered by Interfacial Assemblies of Cleavable Homopolymers journal May 2018
The role of anions in adsorbate-induced anchoring transitions of liquid crystals on surfaces with discrete cation binding sites journal January 2018
Molecular simulations of analyte partitioning and diffusion in liquid crystal sensors journal January 2020
The synthesis of [1,2,3]-triazole-based bent core liquid crystals via microwave-mediated ‘Click Reaction’ and their mesomorphic behaviour journal July 2018
Synthesis and properties of hydroxy tail-terminated cyanobiphenyl liquid crystals journal July 2018
The synthesis of 1-biphenyl-4-alkyl-[1,2,3]-triazoles and their mesomorphic behaviour journal March 2019
Biphenylyl-1,2,4-oxadiazole based liquid crystals – synthesis, mesomorphism, effect of lateral monofluorination journal June 2019
New room temperature nematogens by cyano tail termination of alkoxy and alkylcyanobiphenyls and their anchoring behavior on metal salt-decorated surface journal September 2019
The synthesis of [1,2,3]-triazole-based bent core liquid crystals via microwave-mediated ‘Click Reaction’ and their mesomorphic behaviour text January 2018
The synthesis of [1,2,3]-triazole-based bent core liquid crystals via microwave-mediated ‘Click Reaction’ and their mesomorphic behaviour text January 2018
Synthesis and properties of hydroxy tail-terminated cyanobiphenyl liquid crystals text January 2018
Synthesis and properties of hydroxy tail-terminated cyanobiphenyl liquid crystals text January 2018
The synthesis of 1-biphenyl-4-alkyl-[1,2,3]-triazoles and their mesomorphic behaviour text January 2019
The synthesis of 1-biphenyl-4-alkyl-[1,2,3]-triazoles and their mesomorphic behaviour text January 2019
Biphenylyl-1,2,4-oxadiazole based liquid crystals – synthesis, mesomorphism, effect of lateral monofluorination text January 2019
Biphenylyl-1,2,4-oxadiazole based liquid crystals – synthesis, mesomorphism, effect of lateral monofluorination text January 2019
New room temperature nematogens by cyano tail termination of alkoxy and alkylcyanobiphenyls and their anchoring behavior on metal salt-decorated surface text January 2019
New room temperature nematogens by cyano tail termination of alkoxy and alkylcyanobiphenyls and their anchoring behavior on metal salt-decorated surface text January 2019