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采用热重—差热结合变温红外光谱分析N-丁基吡啶氯亚锡酸盐离子液体[Bupy]Cl/n Sn Cl2(n=0,1,2)的热行为,结果表明:离子液体[Bupy]Cl的蒸汽压比另外两种离子液体要大,液程范围较窄;离子液体[Bupy]Cl/Sn Cl2和[Bupy]Cl/2Sn Cl2都几乎没有蒸汽压,都能在有水环境下稳定存在,在氮气保护下分解温度都可达300℃以上,在有氧条件下分解温度都降至280℃左右,说明两种离子液体的液程都较宽,可作为高温反应的溶剂或催化剂,但氧气会降低离子液体的分解温度,都是从阳离子先分解,且温度会影响这两种离子液体的阴离子结构,前者的阴离子在90℃至170℃之间形成,170℃至280℃之间保持稳定,后者的阴离子在100℃至160℃之间形成,160℃至280℃之间保持稳定。
The thermal behavior of [Bupy] Cl / n Sn Cl2 (n = 0,1,2) in N-butylpyridinium chloride stannate ionic liquid was analyzed by TG-DTA and TEM. The results showed that the ionic liquids [ Bupy] Cl has a larger vapor pressure than the other two ionic liquids and has a narrower liquid range. The ionic liquids [Bupy] Cl / Sn Cl2 and [Bupy] Cl / 2Sn Cl2 have almost no vapor pressure, Under the protection of nitrogen under the decomposition temperature up to 300 ℃ above, under aerobic decomposition temperature dropped to about 280 ℃, indicating that the liquid two wide ionic liquid can be used as a high temperature reaction solvent or However, the oxygen will lower the decomposition temperature of the ionic liquid, both decompose from the cation first, and the temperature will affect the anionic structure of the two ionic liquids. The anion of the former forms between 90 ° C and 170 ° C and the temperature between 170 ° C and 280 ° C The latter anion is formed between 100 ° C and 160 ° C and is stable between 160 ° C and 280 ° C.