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Quadrupole relaxation enhancement and polarisation transfer in DMSO solution of [Bi(NO3)3(H2O)3]*18-crown-6 in solid state |
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| Authors: | Danuta Kruk Elzbieta Masiewicz Evrim Umut Martin Schlögl Roland Fischer Hermann Scharfetter |
| Institution: | 1. Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Polanddanuta.kruk@matman.uwm.edu.pl;3. Faculty of Mathematics and Computer Science, University of Warmia and Mazury in Olsztyn, Olsztyn, Poland;4. Institute of Inorganic Chemistry, Graz University of Technology, Graz, Austria;5. Institute of Medical Engineering, Graz University of Technology, Graz, Austria |
| Abstract: | ABSTRACT1H spin-lattice relaxation studies have been performed for pure Bi(NO3)3(H2O)3]*18-crown-6 in powder and its solution in dimethyl sulfoxide (DMSO). The experiments have been carried out in the frequency range of 10?kHz–30?MHz and the temperature range of 240–277?K; at 277?K the solution is already frozen. The 1H relaxation of pure Bi(NO3)3(H2O)3]*18-crown-6 has been interpreted in terms of three dynamical processes. Quadrupole Relaxation Enhancement effects have been observed in the frozen DMSO solution of Bi(NO3)3(H2O)3]*18-crown-6. The specific mechanisms of the 1H spin-lattice relaxation enhancement have been discussed distinguishing between effects caused by time independent (residual) and fluctuating 1H-209Bi dipole-dipole interactions. |
| Keywords: | NMR relaxation quadrupole peaks polarization transfer |