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A 39K NMR study of potassium solution in tetrahydrofuran containing cryptand[2.2.2] |
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| Institution: | 1. Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Beijing 102249, China;2. College of Chemistry and Chemical Engineering, Shaanxi University of Science and Technology, Xian, Shaanxi 710021, China;3. Shaanxi Extend Oil (Group) Co., LTD. Research Institute, Xian, Shaanxi 710075, China;4. School of Mechanical, Materials & Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia;1. CSIRO Manufacturing, PO Box 21, Belmont, VIC 3216, Australia;2. National Gallery of Victoria, 180 St Kilda Rd, Melbourne, VIC 3004, Australia |
| Abstract: | By means of 39K NMR spectroscopy the presence of potassium anions and complexed potassium cations in blue potassium solutions in THF containing cryptand2.2.2] was evidenced. Spin-lattice and spin-spin relaxation was studied in the temperature range 178–238 K. The comparison of relaxation behaviour of the investigated system with that of potassium solutions containing 18-crown-6 or tetraglyme instead of cryptand2.2.2] revealed the major influence of the complexing agent on interactions of K+ with its counterion. |
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