A new low global warming potential (GWP) fluid hydrochlorofluoroolefin trans-isomer of 1-chloro-3,3,3-trifluoropropene (HCFO-1233zd(E)) has been developed in our laboratory. HCFO-1233zd(E) has a very short atmospheric lifetime of 26 days and a global warming potential (GWP) of less than 5 (Wong et al., http://www.honeywell-solsticelba.com. product-info/environmental-regulatory/#atmospheric-impact, 2012). This makes it an excellent environmentally friendly candidate for many applications including refrigeration, foam expansion agents, and as solvents. In this work we have presented our measurements of physical properties like the boiling point, critical temperature, vapor pressure, liquid density, and surface tension of HCFO-1233zd(E). We have also provided our calculated ideal gas heat capacity at constant pressure using quantum mechanical theory. Temperature-dependent properties are correlated with standard forms of equations and described in the paper.

Ionic liquids (ILs), also referred to as molten salts, have found application as electrolytes for batteries and super-capacitors, in electroplating baths, as designer solvents, and as reaction media. A few of the desired properties of a super-capacitor electrolyte are nonflammability, thermal stability, and electrochemical stability. ILs containing aromatic cations have been shown to have low viscosity which results in a high electrochemical conductivity. There is a delicate balance between increasing the thermal stability, or decreasing the melting point, and increasing the electrochemical conductivity of the IL. This study focuses on pyridinium fluorohydrogenate, [pyridine · H + ][H 2 F 3 ] − . Pyridinium fluorohydrogenate has been synthesized by the reaction of pyridine and anhydrous hydrofluoric acid. This IL has a relatively high electrical conductivity (∼98 mS · cm −1 at 23 • C), a wide electrochemical window, and a boiling point of 186 • C. A stable gel can also be formed by combining [pyridine · H + ][H 2 F 3 ] − and a super absorbent polymer such as polyacrylic acid. The gel adds mechanical stability to the matrix while not greatly affecting the conductivity of the IL.

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