Thermal Properties of Macrocyclic Polyethers: Implications for the Design of Crown Ether-Based Ionic Liquids was written by Pawlak, Alan J.;Dietz, Mark L.. And the article was included in Separation Science and Technology (Philadelphia, PA, United States) in 2014.Application In Synthesis of 1,4,7,10-Tetraoxa-13-azacyclopentadecane This article mentions the following:
The most commonly studied classes of ionic liquids (ILs) comprise relatively large and asym. heterocyclic cations (e.g., diakylimidazolium or N-alkylpyridinium) in combination with any of a wide variety of inorganic (e.g., BF4–, Cl–) or organic (e.g., bis[(trifluoromethyl-sulfonyl)imide], Tf2N–) anions. Recently it has been shown that ILs can also be formed by complexation reactions of metal cations (e.g., Li+, as its Tf2N– salt) with various neutral ligands (e.g., cyclohexano-15-crown-5 or alkylamines). Because the upper limit of the useful temperature range of any IL is governed by its thermal stability, and because the thermal stability of a neutral ligand (i.e., its propensity to either volatilize or decompose) is of obvious importance in determining that of an IL prepared from it, a systematic examination of the thermal properties of a series of macrocyclic polyethers of potential utility in the synthesis of new ILs has been undertaken. The results showed that the temperature corresponding to the onset of mass loss upon heating (i.e., evaporation and/or decomposition) varied with the ring size, substitution, nature of the donor atoms, and stereochem. of the macrocycle, but is most strongly influenced by the mol. weight and aromatic content of the compound In the experiment, the researchers used many compounds, for example, 1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3Application In Synthesis of 1,4,7,10-Tetraoxa-13-azacyclopentadecane).
1,4,7,10-Tetraoxa-13-azacyclopentadecane (cas: 66943-05-3) belongs to ethers. Of all the functional groups, ethers are the least reactive ones. Ether bonds are quite stable towards bases, oxidizing agents and reducing agents. At room temperature, ethers are pleasant-smelling colourless liquids. Relative to alcohols, ethers are generally less dense, are less soluble in water, and have lower boiling points. They are relatively unreactive, and as a result they are useful as solvents for fats, oils, waxes, perfumes, resins, dyes, gums, and hydrocarbons. Vapours of certain ethers are used as insecticides, miticides, and fumigants for soil.Application In Synthesis of 1,4,7,10-Tetraoxa-13-azacyclopentadecane
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem