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Vibrational Spectroscopic Study on Ion Solvation and Association of Lithium Perchlorate in 4‐Methoxymethyl‐ethylene Carbonate
Author(s) -
Qiao HongWei,
Luan HeLin,
Zhou ZhiMing,
Yao Wen
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790087
Subject(s) - chemistry , solvation , lithium perchlorate , ethylene carbonate , perchlorate , ion association , solvation shell , ion , lithium (medication) , inorganic chemistry , raman spectroscopy , molecule , photochemistry , electrolyte , organic chemistry , medicine , physics , electrode , optics , endocrinology
Solvation interaction and ion association in solutions of lithium perchlorate/4‐methoxymethyl‐ethylene carbonate (MEC) have been studied by using Infrared and Raman spectra as a function of concentration of lithium perchlorate. The splitting of ring deformation band and ring ether asymmetric stretching band, and the change of carbonyl stretching band suggest that there should be a strong interaction between Li + and the solvent molecules, and the site of solvation should be the oxygen atom of carbonyl group. The apparent solvation number of Li + was calculated by using band fitting technique. The solvation number was decreased from 3.3 to 1.1 with increasing the concentration of LiClO 4 /MEC solutions. On the other hand, the band fitting for the ClO − 4 band revealed the presence of contact ion pair, and free ClO − 4 anion in the concentrated solutions.