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Abstract
A liquid crystal has some of the order of solids and some of the fluidity of liquids, liquid crystals can exist in one of several possible states between solid and liquid at any moment. Liquid crystals are organic compounds that have long molecules and polar groups (NO2, -OR--CN, -NH2) are available at the end of them, sometimes parts like benzene rings are included in these materials. The molecules of these compounds have a linear structure; But for their central groups, the existence of double bonds between their diatoms is certain. The double bond prevents the rotation and stiffness of the molecules, taking into account their long axis ratio, these molecules contain groups with high polarization, and their dipole moment is high. Molecules in liquid crystal are not necessarily spatially ordered; But they can be oriented freely in three directions. In this review article, features such as their properties, structure and composition have been investigated.
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References
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References
Banqui Wu; Ramana.G. Reddy & Robin D. Rogers (2001). "Novel ionic liquid thermalstorage for solar thermal electric power systems". International Solar Energy Conference.445-451:
Barghi S.H.; Adibi M.; Rashtchian D. (2010). "An experimental study on permeability, diffusivity, and selectivity of CO2 and CH4 through [bmim][PF6] ionic liquid supported on an alumina membrane: Investigation of temperature fluctuations effects". Journal of Membrane Science. 352-346:362. Doi:10 .1016/j.memsci. 2010.06.047.
Ch. Jagadeeswara Rao, R. Venkata krishnan, K. A. Venkatesan, K. Nagarajan, 332 - 334, Feb. 4-6, Sixteenth national symposium on thermal analysis(Thermans 2008).
D. R. MacFarlane; J. Golding; S. Forsyth; M. Forsyth & G. B. Deacon (2001). "Low viscosity ionic liquids based on organic salts of the dicyanamide anion". Chem. Commun. (16): 1430–1431. doi /.1038.10 : b103064g.
E.N. Ramsden B.Sc.,Ph. D. DPhil A- level Chemistry Wolfreton School ,Hull 1988(pp141-145) (322-352)(365-391).
H. L. Chum; V. R. Koch; L. L. Miller; R. A. Osteryoung (1975). "Electrochemical scrutiny of organometallic iron complexes and hexamethylbenzene in a room temperature molten salt". J. Am. Chem. Soc. 97 (11): 3264–3265. doi:10.1021/ja00844a081.
Hegmann, t., qi, h., marx, v.m. "nanoparticles in liquid crystals: synthesis, self-assembly, defect formation and potential applications", journal of inorganic and organometallic polymers and materials, vol. 17, pp. 483-508, (2007).
J. M. Crosthwaite; M. J. Muldoon; J. K. Dixon; J. L. Anderson & J. F. Brennecke (2005). "Phase transition and decomposition temperatures, heat capacities and viscosities of pyridinium ionic liquids". J. Chem. Thermodyn. 37 (6): 559–568. doi:10.1016/j.jct.2005.03.013.
J. S. Wilkes; J. A. Levisky; R. A. Wilson; C. L. Hussey (1982). "Dialkylimidazolium chloroaluminate melts: a new class of room-temperature ionic liquids for electrochemistry, spectroscopy and synthesis". Inorg. Chem. 21 (3): 1263–1264. doi:10.1021/ic00133a078.
James P. Armstrong; Christopher Hurst; Robert G. Jones; Peter Licence; Kevin R. J. Lovelock; Christopher J. Satterley & Ignacio J. Villar-Garcia (2007). "Vapourisation of ionic liquids". PhysicalChemistry Chemical Physics. 9 (8): 982–90. Bibcode: 2007 PCCP .... 9.. 982 A. doi:10.1039/b615137j. PMID 17301888.
K. J. Fraser; D. R. MacFarlane (2009). "Phosphonium-Based Ionic Liquids: An Overview". Aust J. Chem. 62: 309–321. doi:10.1071/ch08558. , https://www. researchgate.net /publication /225089857 _Phosphonium-Based_Ionic_Liquids_An_Overview
Marek Kosmulski; Jan Gustafsson & Jarl B. Rosenholm (2004). "Thermal stability of low temperature ionic liquids revisited". Thermochimica Acta. 412: 47–53. doi:10.1016/ j.tca .2003 .08.022.
Martyn J. Earle; José M.S.S. Esperança; Manuela A. Gilea; José N. Canongia Lopes; Luís P.N. Rebelo; Joseph W. Magee; Kenneth R. Seddon & Jason A. Widegren (2006). "The distillation and volatility of ionic liquids". Nature. 439 (7078): 831–4. Bibcode :2006Natur .439..831E. doi :10.1038/nature 04451 . PMID 16482154.
Mota-Martinez M. T.; Althuluth M.; Berrouk A.; Kroon M.C.; Peters Cor J. (2014). "High pressure phase equilibria of binary mixtures of light hydrocarbons in the ionic liquid 1-hexyl-3-methylimidazolium tetracyanoborate". Fluid Phase Equilibria. 362: 96–101. doi:10 .1016/j .fluid .2013.09.015.
Paul Walden (1914), Bull. Acad. Sci. St. Petersburg, pages 405-422.
Peter Wasserscheid (2006). "Volatile times for ionic liquids". Nature. 439 (7078): 797.Bibcode:2006Natur.439.. 797W. doi:10.1038/439797a. PMID 16482141..
R. J. Gale; R. A. Osteryoung (1979). "Potentiometric investigation of dialuminium heptachloride formation in aluminum chloride-1-butylpyridinium chloride mixtures". Inorganic Chemistry. 18 (6): 1603–1605. doi/10.1021:ic50196a044.
R. M. Barrer (1943). "The Viscosity of Pure Liquids. II. Polymerised Ionic Melts". Trans. Faraday Soc. 39: 59–67. doi:10.1039/tf9433900059.
Reiter, Jakub (2 Sep 2012). "Fluorosulfonyl-(trifluoromethanesulfonyl)imide ionic liquids with enhanced asymmetry". Physical Chemistry Chemical Physics. 15: 2565–2571. Bibcode:2013PCCP... 15.2565R. doi:10.1039/c2cp43066e. Retrieved 2012-12-12.
S. Gabriel; J. Weiner (1888). "Ueber einige Abkömmlinge des Propylamins". Ber. 21 (2): 2669–2679. doi:10.1002/cber.18880210288.
Sugiyama J, Vuong R, Chanzy H. Electron diffraction study of the two crystalline phases occurring in native cellulose from an algal cell wall. Macromol.1991;24:4168–4175. doi.org/10.1016/j.carbpol. 2018.03.003.
Wilkes J. S.; Zaworotko M. J. (1992). "Air and water stable 1-ethyl-3-methylimidazolium based ionic liquids". Chemical Communications (13): 965–967. doi:10.1039/c39920000965.