PMID- 18636771 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20080922 LR - 20080807 IS - 1520-6106 (Print) IS - 1520-5207 (Linking) VI - 112 IP - 32 DP - 2008 Aug 14 TI - Quaternary ammonium room-temperature ionic liquid including an oxygen atom in side chain/lithium salt binary electrolytes: ab initio molecular orbital calculations of interactions between ions. PG - 9914-20 LID - 10.1021/jp803866u [doi] AB - Interactions of the lithium bis(trifluoromethylsulfonyl)amide (LiTFSA) complex with N, N-diethyl-N-methyl-N-(2-methoxyethyl) ammonium (DEME), 1-ethyl-3-methylimidazolium (EMIM) cations, neutral diethylether (DEE), and the DEMETFSA complex were studied by ab initio molecular orbital calculations. An interaction energy potential calculated for the DEME cation with the LiTFSA complex has a minimum when the Li atom has contact with the oxygen atom of DEME cation, while potentials for the EMIM cation with the LiTFSA complex are always repulsive. The MP2/6-311G**//HF/6-311G** level interaction energy calculated for the DEME cation with the LiTFSA complex was -18.4 kcal/mol. The interaction energy for the neutral DEE with the LiTFSA complex was larger (-21.1 kcal/mol). The interaction energy for the DEMETFSA complex with LiTFSA complex is greater (-23.2 kcal/mol). The electrostatic and induction interactions are the major source of the attraction in the two systems. The substantial attraction between the DEME cation and the LiTFSA complex suggests that the interaction between the Li cation and the oxygen atom of DEME cation plays important roles in determining the mobility of the Li cation in DEME-based room temperature ionic liquids. FAU - Tsuzuki, Seiji AU - Tsuzuki S AD - National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan. s.tsuzuki@aist.go.jp FAU - Hayamizu, Kikuko AU - Hayamizu K FAU - Seki, Shiro AU - Seki S FAU - Ohno, Yasutaka AU - Ohno Y FAU - Kobayashi, Yo AU - Kobayashi Y FAU - Miyashiro, Hajime AU - Miyashiro H LA - eng PT - Journal Article DEP - 20080718 PL - United States TA - J Phys Chem B JT - The journal of physical chemistry. B JID - 101157530 EDAT- 2008/07/19 09:00 MHDA- 2008/07/19 09:01 CRDT- 2008/07/19 09:00 PHST- 2008/07/19 09:00 [pubmed] PHST- 2008/07/19 09:01 [medline] PHST- 2008/07/19 09:00 [entrez] AID - 10.1021/jp803866u [doi] PST - ppublish SO - J Phys Chem B. 2008 Aug 14;112(32):9914-20. doi: 10.1021/jp803866u. Epub 2008 Jul 18.