2O2][TFSI]) and N-ethoxyethyl-N-methylmorpholinium bis(trifluoromethanesulfonyl)imide ([M1,2O2][TFSI]). The results are analysed taking into consideration their ion conformers, electronegativity and hardness, and the IR active vibrations obtained by means of DFT calculations. From the evaluation of Kamlet–Taft parameters, the ether-functionalisation in the cationic ring is found to improve the polarity and hydrogen
基于Kamlet-Taft参数和N-乙氧基乙基-
N-甲基哌啶双(三
氟甲磺酰基)
酰亚胺([P 1,2O2 ] [TFSI] )和N-乙氧基乙基-
N-甲基吗啉双(三
氟甲磺酰基)
酰亚胺([M 1,2O2] [TFSI])。分析结果时要考虑到它们的离子构象,电负性和硬度,以及通过DFT计算获得的IR主动振动。通过对Kamlet-Taft参数的评估,发现阳离子环中的醚官能化可改善IL的极性和氢键酸度。这与计算结果相关,该计算结果表明阳离子环中的氧原子增加了阳离子的电负性。与通过实验和计算获得的IR光谱的比较表明,与[P 1,2O2 ] [TFSI]相比,优选在[M 1,2O2 ] [TFSI]中形成反式- [TFSI]。尽管Kamlet–Taft参数表明[M 1,2O2] [TFSI]具有较高的极性,该IL优选采用反式-[TFSI],其通常被具有较低极性的阳离子稳定。这可能是由于阳离子环中存在氧,这